ZXWM M920 Product Description

ZXWM M920 (V4. 10) Product Description

ZXWM M920 Product Description

ZXWM M920 Product Description Version

Date

Author

Approved By

Remarks

R1.0

Feb.,6,2009

Fang Huanhuan

Xia Yan

Not open to the Third Party

 2009 ZTE Corporation. All ri ghts reserved.

ZTE CONFIDENTIAL: This CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE. Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.

ZTE Confidential Proprietary

reserved.  2009 ZTE Corporation. All rights reserved.

I


TABLE OF CONTENTS 1

Overview ...................... ......................... ......................... ......................... ............... 1

2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11

Highlight Features ...................... ......................... ......................... ......................... 2 Large Capacity and Easy Upgrade ........................ ......................... ......................... 2 Single 40Gbit/s system........................................ ......................... ......................... .. 3 Super-long-haul Transmission........................... ......................... ......................... .... 3 Multi-service Access Mode ......................... ......................... ......................... ........... 3 Flexible networking modes ........................ ......................... ......................... ............ 4 Wavelength Add/Drop Functions ...................... ......................... ......................... ..... 4 Reliable Protection Functions ...................... ......................... ......................... .......... 4 Performance Monitoring Technologies....................................... ......................... ..... 4 Power Management Technology ......................... ......................... ......................... .. 4 Powerful NM ........................................................................................................... 5 WSON .................................................................................................................... 5

3 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.11 3.1.12 3.1.13 3.1.14 3.1.15 3.1.16 3.1.17 3.1.18 3.1.19 3.2 3.2.1 3.2.2 3.3

Functionality ......................... ......................... ......................... ......................... ...... 5 Functions ...................... ......................... ......................... ......................... ............... 6 Large Transmission Capacity ......................... ......................... ........................ ........ 6 Ultra-long-haul Distance Optical Source ......................... ......................... ................ 6 Optical Amplifier ......................... ......................... ......................... ......................... .. 7 Power Management ........................ ......................... ......................... ...................... 8 Performance Detection Function.......................................... ......................... ........... 9 OTN Description.................................. ......................... ......................... ................ 10 Dispersion Management......................... ......................... ......................... ............. 15 Service Functions....................... ......................... ......................... ......................... 15 Wavelength Add/Drop Function....................... ......................... ......................... .... 16 Communication and Monitoring Functions ...................... ......................... .............. 16 Alarm Input/Output Function....................................... ......................... .................. 17 System Level Protection............................... ......................... ......................... ....... 17 Network level Protection................................. ......................... ......................... ..... 18 Network management channel backup ....................... ......................... .................. 21 Supervision Subsystem...................... ......................... ........................ .................. 22 L0/L1/L2 integrated transport technologies ...................... ......................... ............. 23 ROADM Function ...................... ......................... ......................... ......................... . 24 Electrical Cross-Connect Function..................................... ......................... ........... 25 Wavelength Tuning Function ...................... ......................... ......................... ......... 26 Networking........................ ........................ ......................... ......................... .......... 27 System Applications ....................... ......................... ......................... ..................... 27 Networking Modes................................ ........................ ......................... ................ 32 Transmission Codes Supported................... ......................... ......................... ........ 34

4 4.1 4.1.1 4.1.2 4.1.3 4.1.4 4.1.5 4.1.6 4.2 4.2.1 4.2.2

System Architecture ......................... ......................... ......................... ................. 37 Description of System Functional Platform......................... ......................... ........... 37 Optical transfer platform ...................... ......................... ......................... ................ 38 Service convergent platform ....................... ......................... ......................... ......... 38 OM/OD platform........................ ......................... ......................... ......................... . 39 Add/drop platform................................ ......................... ......................... ................ 39 Optical amplifying platform ........................ ......................... ......................... .......... 39 Monitoring platform................................... ......................... ......................... ........... 39 Hardware Architecture............... ......................... ......................... ......................... . 40 Sub-rack ............................................................................................................... 40 Board Description..................... ......................... ......................... ......................... .. 40

II

 2009 ZTE Corporation. All rights reserved.



4.3 4.3.1 4.3.2 4.4 4.4.1 4.4.2 4.4.3

The NM Software System Structure.......................... ......................... .................... 44 Hierarchical structure ............................................................................................ 45 2Interface description...................................... ......................... ........................ .. 46 System Configuration ......................... ......................... ......................... ................. 47 Optical Terminal Multiplexer (OTM) ........................ ......................... ...................... 47 Optical Add/Drop Multiplexer (OADM) ........................ ......................... .................. 47 Optical Line Amplifier (OLA) ....................... ......................... ......................... ......... 50

5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.13.1 5.13.2 5.13.3 5.14 5.14.1 5.14.2 5.14.3 5.14.4 5.14.5 5.14.6 5.14.7 5.14.8 5.15 5.15.1 5.15.2

Technical Specifications ...................... ......................... ......................... ............. 51 Working Wavelength Requirements................................ ......................... .............. 51 System Component Indices............................ ......................... ......................... ..... 59 OMU/ODU Performance Parameters........................... ......................... ................. 61 WSUA/WSUD & WBU Performance Parameters ....................... ......................... ... 67 OADM Performance Parameters ....................... ......................... ......................... .. 69 OA Parameters ...................... ......................... ......................... ......................... .... 69 OTU Interface Indices.......................................... ......................... ......................... 84 Tributary overhead processing of convergence board................. ......................... .. 94 Service Convergence parameters......................................... ......................... ........ 95 OS Channel (SOSC) Performance Indices ...................... ......................... ........... 108 Supervision interfaces indices ...................... ......................... ......................... ..... 108 Dispersion compensation parameters................... ......................... ...................... 109 Physical Performance....................................... ......................... ......................... . 109 Structure Indices ......................... ......................... ......................... ...................... 109 Bearing Requirements of the Equipment Room ....................... ........................ .... 110 Power Supply Indices........................ ......................... ......................... ................ 110 Environment Conditions ...................................................................................... 112 Grounding Requirements...................... ......................... ......................... ............. 112 Temperature and Humidity Requirements................................... ........................ . 113 Requirements for Cleanness ........................ ........................ ......................... ...... 113 Dustproof and Corrosion-Proof Requirements ....................... ......................... ..... 114 Environment for Storage....................... ......................... ......................... ............. 114 Environment for Transportation ........................ ......................... ......................... . 114 Electronic Static Discharge (ESD) ....................... ......................... ....................... 115 Safety requirements ....................... ......................... ......................... ................... 117 Introduction to Interfaces ....................... ......................... ......................... ............ 119 Interface on SEIA board ......................... ......................... ......................... ........... 119 Interface on SPWA board............................. ........................ ......................... ...... 122

6

Appendix A Abbreviation ........................ ......................... ......................... ........ 124

7

Appendix B Followed Standards and Recommendations ........................ ....... 127



III


FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40

!

Rack Diagram of Unitrans ZXWM M920................................ ......................... .......... 1 ZTE"s New-Generation Digital Transmission Product Family......................... ............. 2 Principles of RA....................... ......................... ......................... ......................... ....... 7 Power management sub-system......................................... ......................... .............. 9 OTN description ....................... ......................... ......................... ......................... .... 10 OTN section....................... ......................... ......................... ......................... .......... 11 Interconnection at SDH level ...................... ......................... ......................... ........... 12 Explanation of SM byte................................... ......................... ......................... ....... 12 Dispersion management.......................... ......................... ......................... .............. 15 The Block Diagram of Optical Path 1: N Protection Function.................................... 18 Optical Path Layer 1+1 Protection (Chain Networking)............................ ................. 19 Ring Networking................................... ......................... ......................... ................. 19 Functional Block Diagram for MS 1+1 Protection ....................... ......................... ..... 20 Schematic diagram of 2-fiber bidirectional path shared protection.......................... .. 21 Network management through supervisory channel....................................... .......... 22 Network management through backup supervisory channel..................................... 22 The position of supervision subsystem ....................... ......................... .................... 23 Electrical Cross-Connect System Structural Diagram............................ ................... 25 Whole Network Application with the ZXWM M920 (the System less than 48Wavelength)..................................... ......................... ......................... ..................... 27 Whole Network Application with the ZXWM M920 (the System with 80/96Wavelength)..................................... ......................... ......................... ..................... 28 Whole Network Application with the ZXWM M920 (160/176- Wavelength) ............... 29 Whole Network Application with the ZXWM M920 (the System with 192-Wavelength)31 Point-to-Point Networking (Short-Haul) ....................... ......................... .................... 32 Point-to-Point Networking (Long-Haul)....................... ......................... ..................... 32 Application of Chain Networking ........................ ......................... ......................... .... 33 Application of Ring Networking ......................... ......................... ......................... ..... 33 Ring-with-Chain Networking ......................... ......................... ......................... ......... 34 Cross Connection Networking ...................... ......................... ......................... ......... 34 Functional Blocks of the ZXWM M920 ......................... ......................... ................... 38 Board Slot Arrangement of OTU Sub-rack ...................... ......................... ................ 40 The Hierarchical Structure of the Element Management Software............................ 45 Functional Blocks of the OTM.......................................... ......................... ............... 47 Functional Blocks of the FOADM............................... ......................... ..................... 48 Optical Connection of ROADM Equipment with WBU Boards................................... 49 Optical Connection of ROADM Equipment with WBM Boards ......................... ......... 49 Optical Connection of ROADM Equipment with WSU Boards................................... 50 Functional Blocks of the OLA.................................. ......................... ........................ 50 Schematic Diagram of the DWDM System.................................. ......................... .... 60 Common Interface Area of the OTU Sub-rack..................................... ................... 119 Interfaces on the SPWA board ....................... ........................ ......................... ...... 122

IV




TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6

Characteristics of dual/single pump source.............................. ......................... ......... 7 The application modes ........................ ......................... ......................... .................. 14 Functions of board in supervision subsystem....................................... .................... 22 ZTE Networking Scheme And Application Environment ........................................... 24 ZTE/ ROADM Solutions............................. ......................... ......................... ............ 24 Boards Supporting Wavelength Tuning Function ....................... ......................... ..... 27

Table 7 Table 8 Table 9

The Transmission Codes Supported by 40 ×2.5 Gbit/s System ................................ 35 The Transmission Codes Supported by 40 /48× 10 Gbit/s System ........................... 35 The Transmission Codes Supported by 80/96 × 10 Gbit/s System ........................... 36

Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16

The Transmission Codes Supported by 192 × 10 Gbit/s System .............................. 36 The Transmission Codes Supported by 40/48 × 40 Gbit/s System ........................... 36 The Transmission Codes Supported by 80/96 × 40 Gbit/s System ........................... 37 Board Description................... ......................... ......................... ......................... ...... 40 The Wavelength Allocation based on C band 40 CH/100 GHz Spacing.................... 51 The Wavelength Allocation based on C/C+ band 192 CH/ 25 GHz Spacing ............. 52 The Wavelength Allocation based on C/C+ band 48/96 CH/100 GHz/50 GHz Spacing....................................... ......................... ......................... ......................... . 55 The Wavelength Allocation based on C/C+ band 80 CH/100 GHz Spacing .............. 57 The Wavelength Allocation based on L/L+ band 80 CH/100 GHz Spacing ............... 58 Meaning of Components and Interfaces of the DWDM System ...................... .......... 60 OMU Performance Parameters ...................... ......................... ......................... ....... 61 The VMUX Performance Parameters....................................... ......................... ....... 62 ODU Performance Parameters....................................... ......................... ................ 62 50 GHz / 100 GHz Inter-leaver Performance Parameters................................ ......... 63 25 GHz /50 GHz Inter-leaver Performance Parameters......................... ................... 64 C/L Band OMU/ODU Performance Parameters ...................... ......................... ........ 64 ODU80 & OMU40!coupler "Performance Parameters .......................................... 65 The performance parameters of PDU-4-X are listed in following table........... ........... 65 The performance parameters of PDU-5-X are listed in following table........... ........... 66 The performance parameters of PDU-8-X are listed in following table........... ........... 66 The performance parameters of PDU-9-X are listed in following table........... ........... 66 The performance parameters of PDU-16-X are listed in following table.................... 67 WBU Performance Parameters ........................ ......................... ......................... ..... 67 WSUA/WSUD Performance Parameters.................................... ......................... ..... 68 WBM Performance Parameters ........................ ......................... ......................... ..... 68 OADM Performance Parameters ...................... ......................... ......................... ..... 69 C/L band EOBA Performance Parameters of the 40-channel ...................... ............. 70 C/L band EOBA Performance Parameters of the 80-channel ...................... ............. 71 C band EOBA Performance Parameters of the 48-channel.......................... ............ 72 C band EOBA Performance Parameters of the 96-channel.......................... ............ 73 EOLA Performance Parameters of the 40/80-channel System ...................... ........... 74 Optical Preamplifier Performance Parameters of the 40-channel System................. 76 Optical Preamplifier Performance Parameters of the 80-channel System................. 77 Optical Preamplifier Performance Parameters of the 48-channel System................. 78

Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 Table 34 Table 35 Table 36 Table 37 Table 38 Table 39 Table 40 Table 41 Table 42 Table 43



V


Table 44 Table 45 Table 46 Table 47 Table 48 Table 49 Table 50 Table 51 Table 52 Table 53 Table 54 Table 55 Table 56 Table 57 Table 58 Table 59 Table 60 Table 61 Table 62 Table 63 Table 64 Table 65 Table 66 Table 67 Table 68 Table 69 Table 70 Table 71 Table 72 Table 73 Table 74 Table 75 Table 76 Table 77 Table 78 Table 79 Table 80 Table 81 Table 82 Table 83 Table 84 Table 85 Table 86 Table 87 Table 88

Optical Preamplifier Performance Parameters of the 96-channel System................. 79 EONA Performance Parameters of the 40/80-channel System................................. 80 EONA Performance Parameters of the 48/96-channel System................................. 81 Performance Parameters of EDFA+RAMAN Amplifier ......................... .................... 83 Performance Parameters of RAMAN amplifier .............................................. ........... 83 Performance Parameters of RPOA amplifier...................... ......................... ............. 84 The Interface Indices of 2.5 Gbit/s OTU at the Transmitting End of the ZXWM M920 84 The Interface Indices of 2.5 Gbit/s OTU for the Regenerator.............. ...................... 85 The Interface Indices of 2.5 Gbit/s OTU at the Receiving End of the ZXWM M920 ... 86 The Interface Indices of 10 Gbit/s OTU at the Transmitting End of the ZXWM M920 86 The Interface Indices of 10 Gbit/s OTU for the Regenerator................................... .. 87 The Interface Indices of 10 Gbit/s OTU at the Receiving End....................... ............ 88 The Interface Indices of 40 Gbit/s OTU(DPSK) at the Transmitting End of ZXWM M920........................... ......................... ......................... ......................... ................. 89 The Interface Indices of 40 Gbit/s OTU(DPSK) for the Regenerator ......................... 90 The Interface Indices of 40 Gbit/s OTU(DPSK) at the Receiving End....................... 91 The Interface Indices of 40 Gbit/s OUT (DQPSK) at the Transmitting End of ZXWM M920........................... ......................... ......................... ......................... ................. 92 The Interface Indices of 40 Gbit/s OUT(DQPSK) for the Regenerator.................... 92 The Interface Indices of 40 Gbit/s OTU (DQPSK) at the receiving End............ ......... 93 Tributary overhead processing of convergence board.................... ......................... . 94 The parameters of SRM41 ...................... ......................... ......................... .............. 95 Specification of SRM42 Board....................... ......................... ......................... ........ 97 The parameters of MQT3(DPSK)............................. ......................... .................... 98 The parameters of MQT3 !DQPSK"............................................................... 100 Specification of GEM2/GEMF Board....................................... ......................... ...... 101 Specification of GEM8 Board......................... ......................... ......................... ...... 102 Specification of DSA Board ........................ ......................... ......................... ......... 103 Specification of DSAF Board ....................... ......................... ......................... ........ 104 Specification of DSAE Board ......................... ......................... ......................... ...... 105 Specification of SMU Board................................... ........................ ........................ 106 Specification of FCA Board ....................... ......................... ......................... ........ 107 Main Performance Indices of SOSC ......................... ......................... .................... 108 Functions and parameters of supervision interface at boards................................. 108 Parameters of dispersion compensation equipment......................... ...................... 109 Dimensions and Weight of ZXWM M920................................. ......................... ...... 109 Power Consumption of Commonly Used Boards/Units of ZXWM M920.................. 110 Temperature and Humidity Requirements..................................... ......................... 113 Requirements for Harmful Gases in the Equipment Room ....................... .............. 113 Climate requirement........................ ......................... ......................... .................... 114 Requirements for mechanical stress....................... ......................... ...................... 114 Climate requirement........................ ......................... ......................... .................... 115 Static discharge anti-interference...................................... ......................... ............ 115 RF electromagnetic radiated susceptibility ...................... ......................... .............. 115 Electrical fast transient burst susceptibility at the DC power port ....................... ..... 115 Electrical fast transient burst susceptibilities at the signal cable and control cable ports........................ ......................... ......................... ......................... ................... 116 Surge susceptibility of DC power ...................... ......................... ......................... ... 116

VI




Table 89 Table 90 Table 91 Table 92 Table 93 Table 94 Table 95 Table 96

Surge susceptibility of the outdoor signal cable.................. ......................... ........... 116 Surge susceptibility of the indoor signal cable.............................. ......................... . 116 Conductivity susceptibility of RF field........................ ......................... .................... 116 Conductive emission electromagnetic interference at the direct current port........... 117 Radio active emission electromagnetic interference..................... ......................... . 117 Definitions and Description for the Common Interface on SEIA1........................ .... 120 Definitions and Description for the Common Interface on SEIA2........................ .... 121 Definitions and Description for the Common Interface on SPWA.......................... .. 123



VII


1

Overview Unitrans ZXWM M920 Dense W avelength Division Multiplexing Optical Transmission Equipment is a large-capacity ultra-long-haul transmission system. It can multiplex up to 192 wavelengths (uni-direction) in a single-core fiber, with total transmission capacity of 1920Gb/s in 10G system and 3840Gb/s in 40G system. It offers full-rate optical access capability from STM-1/OC-3 to STM-256/OC-768, as well as complete access capability for other services, such as POS, ATM, GbE and PDH. ZXWM M920 rack i s illustrated in Figure 1. Figure 1

!

Rack Diagram of Unitrans ZXWM M920

Based on the development idea of #creating free, powerful and scalable optical transmission networks$, ZTE develops its new-generation of digital transmission products including Unitrans ZXWM M920 DWDM equipment which provides large bandwidth and



1


long-haul transmission at the backbone layer, ZXMP M820 DWDM equipment, ZXMP M720 DWDM equipment, ZXMP M600 CWDM equipment. The new-generation digital transmission products of ZTE can satisfy all applications from the backbone network to end user access, and provide users with future-oriented overall transmission solutions.Figuer2 shows the applications of ZTE"s optical transmission products. Figure 2

ZTE"s New-Generation Digital Transmission Product Family

M920

M920

M920

DWDM/ROADM

Backbone

M920

Backbone Layer GSR

M820

RNC

M820

GSR

DWDM/ROADM

Metro Core

M720

M720

BRAS

M720 M600 M600

CWDM

M720

M600

M600

DWDM

M720

M720

Broad

Triple

PSTN

Metro Edge

Node B B

ZXWM M920 is mainly applied to the national backbones and provincial backbones.

2

Highlight Features This chapter introduces the salient features of ZXWM M920.

2.1

Large Capacity and Easy Upgrade ZXWM M920 can provide 1920/3840 Gbit/s transmission capacity, fully satisfying the ever-growing requirements on bandwidth. The system is designed with modular structure and multi-rack management technology. It can be smoothly upgraded to 192-wavelength. Its good scalability and expansibility can protect user "s investment maximally

2




2.2

Single 40Gbit/s system ZXWM M920 can supports single 40Gbit/s system, and has f ollowing features: 1

Support 96 wavelengths

Support 80/96*40G transmission and the capacity of at most 3.84T; 2

P-DPSK and RZ-DQPSK modulation for ULH transmission

Improved DPSK coding has good OSNR tolerance and can restrain the non-linear effect well. It can reach 1500KM without the REG with 50GHZ spacing. RZ-DQPSK coding has good PMD tolerance and can restrain the non-linear effect well. It can reach 2000KM without the REG with 50GHZ spacing. 3

Embedded TODC and EDFA and the same dispersion tolerance & power budget as 10G system.

OTU board is embedded with TODC and EDFA, the system allows the biggest dispersion tolerance of -700ps/nm ~+700ps/nm, and the dispersion tolerance & power budget are the same as 10G system. 4

Ultra high integration

40G board only needs 2 slots, with high integration and low power consumption. Single rack supports 21%40G wavelengths. 5

Smooth network upgrade

The 40G board can plug and play in the legacy equipment because the system is developed on the existing WDM platform. It supports smooth upgrade from 10G to 40G without any service interruption.

2.3

Super-long-haul Transmission With different optical transponder units (OTU), EDFA, FEC and AFEC technologies, RZ coding technology, P-DPSK coding technology, distributed Raman amplifier and dispersion management technology, ZXWM M920 can perform super long non-electric relay transmission from several kilometers up to thousands of kilometers.

2.4

Multi-service Access Mode ZXWM M920 adopts an open design. The accessed optical signals can be converted to ITU-T G.692 recommendation compliant wavelength signals for output by employing optical/electric/optical conversion technology. It supports transparent transmission of optical signals in multiple f ormats, such as STM-N (N=1, 4, 16, 64,256), POS, GbE/10GE, ATM, ESCON, FICON and FC, which protect users" benefit and provide an ideal means for network expansion.



3


ZXWM M920 also can multiplex low-rate services into 40G10G or 2.5G rates transparently to improve the availability of system wavelength.

2.5

Flexible networking modes Functionality of ZXWM M920 can be changed from OLA to OADM to OTM by choosing different combination of functional modules, making i t more flexible for complicated network topologies, such as chain, star, cross, tangent-ring and m esh networks.

2.6

Wavelength Add/Drop Functions Filters in the ZXWM M920 can be configured flexibly to implement the adding/dropping of 1 to 80 wavelengths. With this kind of design, the ZXWM M920 supports both the FOADM and the ROADM functions. FOADM: This function is to implement the adding/dropping of fixed wavelengths. ROADM: With this function, wavelengths to be added/dropped can be reconfigured. Besides, add/drop ports can be assigned to these wavelengths flexibly, that is, the port assignment function. ZXWM M920 support ROADM function based on WB, PLC and WSS technologies.

2.7

Reliable Protection Functions ZXWM M920 can provide multi ple and effective protection modes: Optical subnet connection protective switchover (OSNCP); Unidirectional optical li ne protective switchover (ULSR); Unidirectional optical channel protective switchover (UPSR); Bidirectional optical line share protective switchover (BLSR); Bidirectional optical channel share protective switchover (BPSR); 1: N tributary protection etc. which with the switching time shorter than 50 ms. When ZXWM M920 is configured as OADM node on a ring network, route protection of channels can be accomplished.

2.8

Performance Monitoring Technologies ZXWM M920 uses a board performance monitoring unit to capture board performance data, which can be viewed to accurately l ocate a fault via NMS.

2.9

Power Management Technology ZXWM M920 adopts excellent power management technology to adjust and control the power and power spectrum at each point i n the system. ZXWM M920 system supports LAC (line attenuation control), APC (automatic power control), AGC (automatic gain control) etc. technologies. The gain adjustment range of LAC card is: 2-26dB; the gain adjustment range of general optical amplifier is &5dB which can both be adjusted via NM.

4




APC and AGC technologies can control the launched power/gain on MS level to ensure hitless in-service insertion or removal of channels.

2.10

Powerful NM ZXONM E300, adopted by ZXWM M920, can manage CWDM, DWDM and SDH equipments. It employs three-layer C/S structure of GUI/Manager-DB/Agent. Due to flexible networking, it offers the remote NM and hierarchical NM, easily synchronizes the data of multi-NMS or active/standby NM and actualizes the automatic and manual switching. Based on OSPF algorithm, the NMS has ECC automatic route function, that is to say the ECC route between NEs can be set up automatically without manual configuration, which could make the networking application easily and f ast. In addition, the NMS supports remote and online upgrade of NE software and board software, provides management at multiple layers, i.e. NE layer, NE management layer and network management layer, and offers the fault management, performance management, security management, configuration management, maintenance management and system management. The NMS also provides the northbound interfaces, e.g. CORBA, Q3, SNMP and MML, so as to access the higher-lever NM easily.

2.11

WSON ZXWM M920 supports GMPLS/WSON control plane load, and has f ollowing features:

3

1

Rapid automatic route discovery

2

Strong ability for automatic resource discovery

3

Versatile resource management functions

4

Fast end-to-end service provisioning

5

Multi-level SLA

6

Standard technology and open platform

7

Flexible equipment upgradeability

8

Highly operable and maintainable

Functionality This chapter introduces the functions of ZXWM M920 in detail, i ncluding transmission, ultra-long-haul distance transmission, power management, performance test, dispersion management, service capability, communication monitoring, alarm input/output and protection.



5


3.1

Functions

3.1.1

Large Transmission Capacity

3.1.2

•

Transmission system less than 48-wavelength employs on the C band with 100 GHz channel spacing.

•

80/96-wavelength transmission system employs on the C band via inter-leaver technology with 50 GHz channel spacing.

•

192- wavelength transmission system employs on the C band via inter-leaver technology with 25 GHz channel spacing.

Ultra-long-haul Distance Optical Source ZXWM M920 employs the ultra-long-haul distance optical source technologies including forward error correction (FEC) coding, advanced out band FEC coding, RZ code pattern and self-adaptive receiving. 1

FEC technique i

Description

FEC is a signal data processing technique. At the transmitting end, it sends the data with the redundant code generated by the specific algorithm, while, at the receivi ng end, according to the relevant algorithm, it checks and corrects the bit errors occurring during transmission with the redundant codes, and restores the original signals. ii

Features

Improve the error tolerance capability of the transmission signals to reduce signal/noise ratio required by the system, and extend t he transmission distance. The conventional FEC based on G.709 can increase the OSNR tolerance about 5~6 dB, and the advanced FEC technique adopting more effective coding algorithm can increase the OSNR tolerance about 7~9dB. 2

Return to zero (RZ) technique

RZ code allows higher peak value of power than NRZ code, and the mean transmitting optical power of RZ and NRZ c ode are on the same level, so it improves the signal/noise ratio for receiving signals of the system. And RZ code reduces signal power spectral density to effectively suppress non-linear impact during transmission, so RZ code is more suitable f or ultra-long-haul transmission. 3

Self-adaptive receiving technology

The receiver adjusts the judgment point level and phase automatically according to the signal receiving conditions, in order to obtain a higher Q v alue and lower bit error rate.

6




3.1.3

Optical Amplifier Optical fiber amplifier of ZXWM M920 system is based on single-stage mode or doublestage mode. Enhanced Optical Booster Amplifier (EOBA)#Enhanced Optical Line Amplifier (EOLA) and Enhanced Optical Preamplifier (EOPA) is based on single-stage mode , and Enhanced Optical Node Amplifier(EONA) is based on double-stage mode. EOBA#EOLA and EONA use dual pumps, and EOPA use single pump or dual pumps. The wavelength of single pump source is 980nm, and the wavelengths of dual pump sources are 980nm and 1480nm. Gain flatness is &1dB. Extra metal ion and Gain Flattening Filter (GFF) can be added to ensure OA gain flatness. Characteristics of dual/single pump source of EDFA are shown as below:

Table 1

Characteristics of dual/single pump source

Quantity of pump source Dual pumps Single pump

Wavelengt h

Output power

Power stability

Power stableness technique

980nm

100-150mW

&0.02dB

Automatic gain control

1480nm

200-350mw

&0.02dB


980nm

100-150mW

&0.02dB


ZXWM M920 employs ultra-long-haul distance technologies, such as RAMAN amplifier and large power EDFA. Working principles of Raman amplifier (RA) are shown as following: Figure 3

Principles of RA

Compared with EDFA, the RAMAN fi ber amplifier enjoys low noise merit. The equivalent noise factor of the distributed RAMAN amplifier board (DRA) of ZXWM M920 is 0 dB, and switching gain is 10 dB. ZXWM M920 also provides large power EDFA, which directly improves OSNR to extend the transmission distance.



7


3.1.4

Power Management To guarantee the network performance, ZXWM M920 adopts power management technology to adjust and control the power and power spectrum at each point in the system. 1

Intelligent Power Management

The intelligent power management is im plemented by the line attenuation card (LAC), optical amplifier board and EMS. It can detect the changing state of the optical li ne power and make relevant adjustments accordingly, so as to maintain the receiving power and OSNR ratio at the normal value during ZXWM M920"s operation. Attenuation of LAC can be adjusted form 2dB to 26dB. And attenuation of LAC with attenuation slope compensation can be adjusted form 5dB to 26dB. The gain of optical amplifier in ZXWM M920 system can be adjusted via NM, and the typical range is &5dB. ZXWM M920 can provide APR or APSD protection process, that is, the EDFA automatically reduces the power or switches off the power in c ase of no input light, so as to make operator safety. Protection process is fulfilled as follows: •

Optical power supervision device detects signal loss at active optical channel.

•

Reversing pump of RA shuts down.

•

Codirectional EDFA output at downstream node of breakpoint remains (APR) or shuts down (APSD).

•

Inverse EDFA at downstream node of breakpoint shuts down and automatically checks system recovery in intervals specified.

•

Inverse EDFA output at upstream node of breakpoint remains (APR) or shuts down (APSD).

•

Codirectional EDFA at upstream node of breakpoint shuts down and automatically checks system recovery in intervals specified.

•

After bidirectional fibers of the system recover, the output of EDFA and RA at the transmission section of breakpoint returns to normal.

In ZXWM M920 system, RA can automatically shut down and manually restart. 2

Auto Performance Optimization

When APO (Auto Performance Optimization) is adopted, the power management subsystem plane can intelligently adjust LAC and EDFA gain to automatically optimize and manage DWDM system parameters such as optical power and OSNR.

8




The power management subsystem is composed of controller, executor, monitor, communication (within a NE or between NEs) interface and protocols, as shown in the following figure: Figure 4

Power management sub-system

Optical board

Optical board

Monitor Executor

Monitor Executor

Backplane Interface

Backplane Interface Boardcontrol/management backplaneinterface(across subracksandracks)



SNCP

Communication control interfacebetweenNEs

SOSC

CommunicationcontrolinterfacewithinaNE

EMS

SNMS

Power management functions are at SNMS level. The controller is embedded in Manager. •

It takes the data from EMS database and analyzes it according to system service and network topology.

•

It makes the management scheme (comprising the setting states of the power adjustment executors of the NEs) in accordance with the power management algorithm.

•

It supplies the scheme to the operator to view, and then sends it to the NEs to optimize the power.

The network power optimization starts under the command of auto performance optimization. After the automatic optimization completion, it can be executed with the operator "s approval. The automatic power management starts after operation, and monitors the system performances. It can handle a fault automatically, store and display the r esult.

3.1.5

Performance Detection Function 1

ZXWM M920 systems can provide OPM to supervise optical parameters at each optical channel, e.g., optical channel power, central wavelength and OSNR. It can supervise active optical channel in real time without disconnecting services, send



9


related data to NMS and check t he associated physical quantity at NM in two vi ew modes: illustration and data. Measurement precision of central wavelength is &0.1nm, power &1.0dB and OSNR &1.5dB. OPM functions are shown as f ollowing: •

Supervise path wavelength, optical power and OSNR of WDM signals in real-time.

•

Automatic self-calibration.

•

Supervise four channels of input optical signals (with optical switch);

•

Process data on boards, and find out power, wavelength and OSNR at peak points.

If OPM is not configured, NMS can supervise OA and OTU i nput and output power. Precision of optical power is &1dB.

3.1.6

2

The OTU part has performance monitoring and overhead processing functions, which can accurately locate faulty point and type by layer.

•

OTN layer: Monitor loss of frame alarm (OTUk-LOF) and bit interleaver parity check (OTUk-BIP8), and process overhead SM-TTI.

•

SDH signal: Monitor and check B1, B2 and J0 bytes.

•

GbE signal: Monitor and collect error packets and error packet rate statistics.

3

ZXWM M920 equipment provides monitoring port in each board for the carrier to test and monitor the signal quality by accessing the apparatus.

OTN Description 1

The functions supporting OTN i

ZTE DWDM product provides the FEC function for STM-16, STM-64, GbE, 10GbE LAN, STM-256, and the FEC satisfies the coding/decoding mode of G.709 standard.

ii

Provides overhead test and process functions, which can test and manage optical channel in optical domain flexibly.

iii

By adopting the standard RS (255,239) coding/decoding specified in G.709, it can relax OSNR by 5~6dB depending upon requirement.

iv

It is very convenient for testing various services on optical layer, and clarifying network structure.

v

In traditional mode, it can access and test SDH services, which are shown as following:

vi Figure 5

10

OTN description




SDH/SONET Equipment

WDM

WDM

WDM WDM $% NETWROK

OTU

SDH/SONET Equipment

OTU

SDH/SONET Performance monitor

SDH/SONET Performance monitor

Note: For brief explanation, it is only required to il lustrate the unidirectional network application in above figure. Such modes are only applied to SDH services tests, and both SDH equipments and WDM equipments carry out the tests on SDH services. With G.709 standard OTN, the network hierarchy may be very clear. It applies the rich overhead sources in OTN to test and manage network, and performs corresponding test for customer services if necessary. Figure 6

OTN section

OTN SECTION

CLIENT Equipment SDH/SONET ETHERNET SAN...

WDM

WDM WDM NETWORK

OTN

CLIENT Equipment

OTN

OTN Performance monitor

OTN Performance monitor

Client service Performance monitor

Client service Performance monitor

Provides services inter-working and interconnection on OTN conveniently and cuts the cost down. With standard G.709 interface, it may actualize the network inter-working and interconnection of different equipment manufacturers on OTN, and avoid the unnecessary investment. The figure below shows that Site A, B and C adopt the transmission equipments from two different manufacturers, and the inter-working and interconnection are at SDH l evel.



11


Figure 7

Interconnection at SDH level

SITE A

SITE B

STM64

STM64+FEC Provider_1's STM64 FEC Transmitter

SITE C

Provider_1's STM64 FEC Receiver

STM64+FEC

Provider_2's STM64 FEC Transmitter

Provider_2's STM64 FEC Receiver

In above figure, Site B requires the equipments of two manufacturers to stand in the back-to-back mode, which increases the cost. However, as the equipments on OTN have uniform interfaces, it will save much money. vii

Allowable network test on OTN

•

Judges LOF via FAS.

•

Offers the loss of multi-frame (LOM) signal for the overhead signals of some OTU and ODU spanning over multiple frames.

•

Tests the SM (section monitor) overhead in OTUk

Following figure is the explanation of SM byte. Figure 8

Explanation of SM byte

SM 1

2

TTI

BIP-8

3

0 15 16

SAPI BEI

BDI

IAE

RES

DAPI

31 32

Reserved for network operator

63

The TTI is used to transfer a 64-byte message (similar to the J0 byte function in SDH/SONET domain), the message contains a source address and a destination

12




address flag, which OTU signal applies to select r oute via network; in addition, other bytes are applied for the special purposes of operator. In SM, it defines one BIP-8 byte, similar to the B1 of SDH/SONET. 2

Introduction to corresponding supported bytes i

rocess of frame alignment

OTUk frame alignment OTUk frame alignment should be established by searching the OA1, OA2 FAS bytes in OTUk frame (please refer to G.709 recommendation). An OTUk LOF alarm works via monitoring the FAS bytes of OTUk frame. On reset, the frame aliagner goes into out of frame state. In out of frame state, the frame aligner goes into in-frame state when there are 24 c onsecutive valid frame patterns. In in-frame state, the frame aligner goes into out of frame state when there are 24 consecutive invalid frame patterns. The OTUk LOF alarm arises in in-frame state and disappears in out of frame state. OTUk multi-frame alignment OTUk multi-frame alignment should be established on the basis of MFAS byte contained in OTUk frame (please refer to G.709 recommendation). When the received MFAS does not match the expected number of multi-frame during 5 continuous OTUk frames, it should be regarded as out of multi-frame. When a MFAS error is not f ound in 2 continuous OTUk frames, it should be regarded as multi-frame alignment recovery and turned into multi-frame synchronous state. For the new frame alignment requirement, it needs to add two relevant alarms: OTUk out of frame alignment OTUk-LOF (k=1,2) OTUk out of multi-frame alignment (LOM) ii

Functions of TTI

All OTS, OTUk and ODUk layers have their own TTI. Currently, only the TTI test function of OTUk is considered, and the test items make use of the TTI in SM byte. The TTI mismatching is based on the comparison between the expected value and the input one of APIs (i.e. SAPI and DAPI). The APIs is a part of 64-bit TTI signal defined by G.709 recommendation. Both SAPI and DAPI must be under consideration. In order to enhance the flexibility, the test items can be set via NM (only SAPI, only DAPI, both, both not, 4 test modes). The following are the application modes:



13


Table 2

The application modes

Test item

SAPI comparison result

DAPI comparison result

Alarm state

Both not test

Not considered

Not considered

No alarm

Both test

Both matched

No alarm

Both test

One not matched at least

TIM alarm

Only test SAPI

Matched

Not considered

No alarm

Only test SAPI

Not matched

Not considered

TIM alarm

Only test DAPI

Not considered

Matched

No alarm

Only test DAPI

Not considered

Not matched

TIM alarm

The following functions are available: •

Alarm:

OTU1 and OTU2 have the OTUk TTI mismatching (TIM). The alarm only exists at the receiving side of the line. •

Setting command:

The test configuration of the received OTUk TTI has four modes: SAPI, DAPI, SAPI&DAPI, or no SAPI&DAPI. The configuration is rate independent, and only exists at the receiving side of the line. The TTI of OTUk can be configured. SAPI and DAPI can be set at the tr ansmitting end of the line, and the expected values of SAPI and DAPI can be set at the receiving end of the line. •

BIP-8 test

Both OTUk and ODUk layers have their own BIP-8. Currently, only BIP-8 test f unction of OTUk is considered, and the test items make use of the BIP-8 in SM byte. The following functions are available: •

Performance:

OTUk BIP-8 bit error statistics is required by both OTU1 and OTU2. •

Alarm:

The threshold-crossing alarm of 15-minute OTUk BIP-8 bit error is provided.

14




3.1.7

Dispersion Management Dispersion restrictions must be taken into consideration in long-haul t ransmission. Certain amounts of the dispersion compensation modules are configured in the dispersion compensation plug-in box (DCM) of ZXWM M920 on actual demands. By configuring the values of line compensation, precompensation and post-compensation reasonably, the system could actualize the balance compensation, as shown in Figure 9. Figure 9

3.1.8

Dispersion management

Service Functions 1

Service Access Function

ZXWM M920 can access the following services: •

SDH services including STM-1/4/16/64/256

•

SONET services including OC-3/12/48/192/768

•

ATM or POS services including VC4, VC4-4c and VC4-16c

•

Ethernet services including FE, GbE, 10GbE

•

Enterprise intranet services such as ESCON, FICON, and FC.

•

Any rate services between 34 Mbit/s ~ 2.7 Gbit/s

2

Service Convergence Function

ZXWM M920 can converge and de-multiplex the low rate signals. •

Each SRM42 board converge 4 STM-1/4 SDH signals or ATM signals to STM-16 signal.

•

Each SRM41 board converge 4 STM-16 SDH signals or ATM signals to STM-64 signal.



15


3.1.9

•

Each MQT3 board converge 4 STM-64/OC-192/10GbE/OTU2 signals to OTU3 signal.

•

Each GEM2/GEMF board converge 2 GbE signals to 2.5 Gbit/s rate.

•

Each GEM8 board converge 8 GbE signals to 10 Gbit/s rate.

•

DSA board implements the multiplexing/demultiplexing between eight data service signals at tributary side and two STM-16 signals at aggregate side.

•

It is applicable to different networking conditions by selecting tributary modules and aggregation module type.

Wavelength Add/Drop Function The ZXWM M920 supports the adding/dropping of wavelengths in the granularity of 1 wavelength, 4 wavelengths or 8 wavelengths. The quantity of wavelengths to be added/dropped can be expanded from 1 to 80. An optical add/drop multiplexer subsystem can be configured as a fixed one (FOADM) or a reconfigurable one (ROADM). FOADM: In such subsystem, OAD board is needed to add/drop fixed wavelengths in the system. ROADM: In such subsystem, additional WBU or WSU board is needed. Configure the system in the EMS to implement the adding/dropping and direct transmission of any specified wavelengths in the same direction. Moreover, the ROADM subsystem provides the port assignment function, with which wavelengths can be added/dropped through assigned ports. In ROADM subsystems, it is unnecessary to adjust fibers manually when the quantity of wavelength to be added/dropped changes or some other wavelengths need to be added/dropped.

3.1.10

Communication and Monitoring Functions Communication and monitoring functions are implemented jointly by the main control board (SNP) and optical supervision channel board (SOSC). The functions are: 1

Main control board (SNP)

•

Sample and process the alarms and performance of all boards in the equipment and report them to the NMS.

•

Receive various configurations and maintenance commands issued by the NMS, and forward them to corresponding boards.

•

Transfer the data from other NE SNPs.

16




•

As the traffic increases, ZXWM M920 is applicable to the multi-rack configuration at one NE. One SNP board can manage 16 racks at most. Users can flexibly configure according to the actual number of racks at the node equipment.

•

The fan unit monitors the fan speed and temperature, and feeds back the information to NMS, so that the user can view the relevant information at the NMS. Meanwhile, NMS sends the commands to the fan unit to manually adjust the fan speed.

•

Optical supervision channel card (SOSC)

The SOSC uses the 1510 nm channel to transmit the NE monitoring information in the bidirectional transceiving mode at the monitoring channel rate of 100 Mbit/s. It multiplexes and demultiplexes overhead, order wire and clock synchronization.

3.1.11

Alarm Input/Output Function 1

Alarm input function

ZXWM M920 uses the optical coupler isolation signal to access the alarm inputted by the external monitoring equipment, and displays it on the NMS through the ALARM_IN interface on the SEIA board. The system can access 10 external alarms at most. The alarm type can be set through the NMS for detection of external environment alarms, such as fan, doors and temperature. 2

Alarm output function

The equipment alarm is outputted to the WARN interface in the SEIA board and then outputted to the monitoring display cabinet or other monitoring units in the equipment room via the ALARM_OUT interface of the SEIA board. Signals are isolated by relays.

3.1.12

System Level Protection 1

OTU board 1:N protection

The WDM networks generally require spare OTU boards and elements. W hen configured in protective mode, spare part can realize real-time protection, which is much quicker, safer and saves maintenance cost. 1:N protection only need to configure OTU and OMCP units at both ends of OTM, and may utilize the spare OTU board also, which has a low cost. The processes are shown in Figure 10.



17


Figure 10 The Block Diagram of Optical Path 1: N Protection Function

OTU 0

OTU 0

2

T r a f 8 f i c

 !

2

2 2 1

Optical Switch

3

OTU 8

OTU 8

4

1

 2 2 ! Optical Switch

3

OTU 7

OA

OA

OTU 7

1

r a f f i c 0

Optical Switch

3

OMCP T r a f f i c

2

2 2 1

Optical Switch

T r a f f i 7 c

4

2

T 1

 !

2 2

OMCP  !

T r a f f 8 i c

2

4

T r a f f i c

Optical Switch

3

4

2

T r a f f 7 i c

 !

2 2 1

3

OTU 1

4

 !

2 2 OTU 1

1

Optical Switch

3

4

T 1 r a f f i c 0

When several paths of services are f aulty simultaneously, it is required to protect the services with higher priority set in the NMS. One OMCP board can perform 1: 8 protections. 2

Power Supply Protection

It has 1+1 power protection on the sub-rack with two power inputs. The sub-rack power module PBX fulfills reverse c onnection prevention, soft start, balance and supervision of two power inputs. The information is sent to PWSB on the top of rack for processing and reporting to NM via alarm cable.

3.1.13

Network level Protection 1

Optical Path 1+1 Protection i

Protection principles

The optical path 1+1 protection is implemented with the OP board, by sending concurrently and receiving selectively in both working path and protection path. ii

Applications

One OP board is used to protect a pair of bidirectional services with the same wavelength. Under the 1+1 protection case, the number of OP boards c onfigured is the same as that of protected channels. iii

18

Chain networking




The protection path and the protected path are transmitted in the same fiber. On the chain networking, 1+1 protection can only perform equipment protection instead of route protection, as shown in Figure 11. Figure 11

iv

Optical Path Layer 1+1 Protection (Chain Networking)

Ring networking

On the ring networking, the protection path and the protected path reach the receiving end through different paths. 1+1 path protection can protect both route and the equipment. The ring networking is shown in Figure 12. Figure 12

Ring Networking

C Protection path

B

Work path


D

A


19


2

MS 1+1 Protection

The MS 1+1 protection of ZXWM M920 adopts 1+1 protection mode section by section, as shown in Figure 13. Figure 13

OTU OTU OTU OTU OTU OTU OTU

OTU

Functional Block Diagram for MS 1+1 Protection

λ1

λ1

λ2 λ3

O M D

EOBA

EOPA

A fiber 2

λn

S O P

λ1

λ2

O D U

O D D

EOPA

λ3

λn

S O P

λ1

B fiber 1

λ2 λ3

A fiber 1

λ2

EOBA B fiber 2

λn

O M U

λ3

λn

OTU OTU OTU OTU OTU OTU OTU

OTU

Fiber 1 is the work path and fiber 2 is the protection path

2-fiber bidirectional path shared protection In the 2-fiber bidirectional path shared protection ring, '1 of the external ring forms the working path, and '1 of the internal ring forms the protection path. The working path allows wavelength multiplexing of multiple unidirectional services, and the protection path shares protection of all services on the working path. Meanwhile, the optical switch can be connected via OPCS (path shared protection board) to control the adding status of adding protection wavelengths, so as to avoid conflict, on the protection ring, of multiple services that use the same working wavelength. In Figure 14, for example, as optical fibers on a certain span failed (indicated by the symbol of &), services passing this span are broken, thus the access switch starts operation at the transmitting end, and services are transmitted along the protection route. When the two switching switches at the receiving end start operation, services are received from the protection route, and the service protection is actualiz ed.

20




Figure 14 Schematic diagram of 2-fiber bidirectional path shared protection

Shared protection pa th Access switch +,of the shared -./0 protect ion 12)* path Working path Service route after switching Service route before switc hing

3.1.14

Switching '()* switch

Network management channel backup In DWDM transmission networks, network m anagement information is transmitted through an optical supervisory channel, which is generally t ransmitted through the same optical fiber with main channel. In case of any f ailure in main channel, it will also affect the supervisory channel, i.e. loss of c ontrol on NE. In the condition of high traffic and backbone network, it is not affordable to lose control. To solv e such problems, ZXWM M920 provides abundant measurements and protection to t he supervisory channel. In ring network, when certain section fails (e.g. optical fiber damage) in a certain direction, network management information automatically switch to the optical supervisory channel in the other direction of the ring without affecting the management of the whole network. In chain network, the situation is more critical, because breakage in optical fi ber means breakage of supervisory channel. Consequently, network management administrators are unable to get the supervisory information of failed station. To avoid this accident, network management information should use the backup channel. By using data communication network (DCN) and routers, ZXWM M920 can provide backup network management channel. When the network is normal, network management information is transmitted over the main supervisory channel, as shown in Figure 15.



21


Figure 15

Network management through supervisory channel

On the failure of main supervisory channel, network elements automatically switch the management information to the backup channel to guarantee that the network management system can supervise and operate the entire network, as illustrated in the Figure 16. Figure 16

3.1.15

Network management through backup supervisory channel

Supervision Subsystem Supervision subsystem consists of SNP board, SOSC board and SEI board. It provides a variety of functions, such as communication bus, EMS management interface and supervision channel transmission. The functions of different boards are described in the below Table 3 :

Table 3

Board/Fu nctional Module Code

Board

Name Function Description

SNP

Node Processor Board Optical Supervision Channel Board

Implements various functions, such as

SOSC

22

Functions of board in supervision subsystem

Establishes and maintains optical supervision channel between the NEs, which provides route for communication between the NEs. It also implements the




Board/Fu nctional Module Code

SEI

Board

Name Function Description

Extension Interface Board

transmission of ECC information, order wire information, user information (transparent user channel) and control information between the NEs. Leads sub-rack interface to the panel so that the master rack and t he slave rack can connect with each other.

The position of supervision subsystem is shown in Figure 17. Figure 17

3.1.16

The position of supervision subsystem

L0/L1/L2 integrated transport technologies ZXWM M920 WDM platform integrates L0/L1/L2 transport technologies and enables the flexible accessing and dispatching of service, especially the prevailing Ethernet servic e. ZXWM M920 offers three kinds of ROADM technology aiming at different scenarios to provide the most cost-effective solution for the customer. ZXWM M920"s multi-degree ROADM based on WSS technology enables the wavelength routing and accelerates the deployment of new services. To better transport the Ethernet service, ZXWM M920 offers both tr ansparent transmission and statistic multiplexing of Ethernet service, the former is based on TDM technology without affecting the Ethernet service, the latter is based on L2 switch technology to enhance the transport efficiency of Ethernet service and reduce the CAPEX and OPEX of the network. ZXWM M920"s L2 switch supports E-Line(EPL & EVPL) and E-LAN.



23


3.1.17

ROADM Function ROADM supports dynamic wavelengths add/drop through remote control from NMS. In directionless configuration, the wavelength can be retrieved or assigned from/to any direction. In colorless configuration, any port can add/drop any wavelength. ZTE ROADM solutions are based on the WB (wavelength blocker), PLC (Planar Lightwave Circuit) and WSS (Wavelength Selective Switch) technology, which can support 2~9 directions ROADM solution. ROADM provides node reconfiguration, implements connection between any two nodes, wavelength-level add/drop and pass-through configuration without m anual intervention, thus addressing service demands and cutti ng operation & maintenance cost. In addition, the adoption of ULH WDM techniques greatly reduces full-band service terminations and undesirable O-E regeneration, enabling a highly scalable network, and saving equipment investment. With ROADM, multi-ring, mesh and star can be formed flexibly, adapting to dynamic characteristics and networking requirements for f uture service networks. ZXWM M920 supports colorless and directionless ROADM solutions which are the most flexible. Colorless means any wavelength can be assigned to any port. Directionless means any direction can be assigned to any port. ZXWM M920 ROADM supports multiple networking modes, meets networking requirements at different levels. The Comparison of ROADM networking schemes is shown as below table.

Table 4

ZTE Networking Scheme And Application Environment

Scheme

Linear ROADM

Ring ROADM

Mesh ROADM

Main application environment

Long-haul trunk line

Metro network

Metro network

Technology

WB ROADM PLC ROADM

WB ROADM PLC ROADM WSS ROADM

WSS ROADM

Spectrum balancing, wavelength add/drop

Wavelength add/drop, wavelength scheduling, wavelength grooming

Wavelength add/drop, wavelength scheduling, wavelength grooming

Available functions

ZTE ROADM system provides multiple solutions, complete networking modes, meeting requirements of the customers with different network status and at various levels. The below table lists the recommended ROADM configuration targeting customers" different requirements:

Table 5

ZTE/ ROADM Solutions

Solution

Characteristics

WSS ROADM with tunable port in add channel

24

Add/drop wavelengths can be provisioned randomly, wavelength grooming flexibly.


Target customer Uncertainty in service growth, large traffic of future services, or requiring extremely high network



flexibility and wavelength route. Add/drop wavelengths are fixed, supports complex network architecture in the future.

Services are relatively fixed, future networks may evolve towards Mesh.

PLC ROADM with fixed port Add/drop wavelengths are in add/drop channels fixed, the cost is low.

Services are relatively fixed, future services are predictable.

WB ROADM with fixed port in add/drop channels

Services are relatively fixed, future services are predictable.

WSS ROADM with fixed port in add channel

3.1.18

Add/drop wavelengths are fixed, the cost is low.

Electrical Cross-Connect Function Electrical Cross-Connect system can access data services including GE, FC, FICON, ESCON, SDH and DVB. The services can be aggregated into multiple ODUk services on the tributary convergence board and be cross connected at a granularity of ODU0/ODU1/ODU2. Then the cross connected signals are aggregated into OTU2 on the group convergence board and are eventually output from the line-side interface. Electrical Cross-Connect system is categorized as centralized or distributed switching platform in . Figure 18 Electrical Cross-Connect System Structural Diagram

As the figure shown, Electrical Cross-Connect system is composed of customer-side aggregation, line-side aggregation, and switching units. So it can achi eve sub-wavelength dispatching. The Electrical Cross-Connect system can access multi-service such as, Ethernet, SDH, Fiber Channel (1G/2G), ESCON, FICON, etc. And it adopts a powerful electrical-layer cross-connect capability and enables trunk and wavelength conversion. Adding/dropping services and pass-through services can occupy different sub-



25


wavelengths in a single wavelength for transmission, minimizing pass-through wavelengths and resulting in wavelength saving and lowered CAPEX. There are many kinds of tributary convergence boards, which multiplex the customer-side services and transmit them to the cross-connect unit via the backplane interface. The cross-connect unit, which named CSUB, has clock processing and backplane signal cross-connect functions. The CSUB choose an advanced clock from line clocks and external clocks as system clock. The tributary convergence units include DSAC, SAUC and SMUBC boards. DSAC board has 8 ports and can access multi -data service respectively. SAUC board can assess 4 STM-16 signals. SMUBC board can assess 10G signals Per group convergence board, the 10G line board (OTU2 Line card 1*10G) receives the signals from the backplane, and aggregates them into OTU2 to output at the line side. And the name of group convergence board is SMUBL. The centralized Electrical Cross-Connect system can achieve the sub-wavelength switch. The switching capacity is 360G. It also can cooperate with the ROADM to achieve wavelength and sub-wavelength switch. The distributed service switching platform (DSS) consists of four data service access cards (DSAB), and each card is composed of line side unit, client unit and switching matrix. Client unit can access multi-service such as Ethernet, SDH, Fiber Channel (1G/2G), ESCON, FICON, etc. The non-blocking service switching between these f our cards can realize sub-wavelength service dispatching or multicasting between multiple directions. The switching granularity can be ODU0/ODU1/ODU2. Total switching capacity of each DSS is 80G and single subrack can support multiple DSS. The cross connected signals are aggregated into OTU2 on the group convergence board and are eventually output from the line-side unit. In DSS subsystem, switching matrix is distributed on service card and doesn"t occupy other service slots. Such highly integrated cards can reduce power consumption effectively.

3.1.19

Wavelength Tuning Function Traditional DWDM systems use fixed wavelength lasers as light sources, which only output fixed wavelengths complying with the specifications of ITU-T G.692. Fixed wavelength lasers can not be fully utilized when they are used as standby light sources, which results in the increase of cost. W ith the continuous development of light source technology, a kind of tunable wavelength laser that can meet the requirement for multiwavelength tuning appears. The #tunable wavelength laser $ refers to a laser module that can be controlled to output different wavelengths in a certain bandwidth. The channel quantity and channel spacing of the output wavelengths meet the specifications of ITU-T G.692. With the application of tunable wavelength lasers, wavelengths can be selected dynamically for signals in a DWDM system according to the actual application of wavelengths. Especially when the system uses standby light sources, using tunable wavelength lasers can improve the utilization ratio of wavelengths. Some service boards of the ZXWM M920 support both fixed wavelength output and tunable wavelength output. The below table lists the boards supporting tunable

26




wavelengths and their tuning ranges (relationship among operating band, channel quantity and channel spacing).

Table 6

Boards Supporting Wavelength Tuning Function

Board

Operating Band

Channel Quantity @ Channel Spacing

40G boards (with FEC or AFEC) TST3

C band

40 CH@100 GHz 80 CH@50 GHz

MQT3 10 G boards (with FEC or AFEC) EOTU10G C band

40 CH@100 GHz 80 CH@50 GHz 96 CH@50 GHz (CE band)

C band

40 CH@100 GHz 80 CH@50 GHz

OTUF

C band

4 CH@100 GHz (continuous wavelengths) 16 CH@50 GHz (continuous wavelengths)

GEMF

C band

DSAF

C band

SRM41 FCA SMUBL SOTU10G 2.5 G boards (with FEC)

16 CH@100 GHz (continuous wavelengths)

2.5 G boards (without FEC) OTU

C band

3.2

Networking

3.2.1

System Applications 1

H@100 GHz (continuous wavelengths) 16 CH@50 GHz (continuous wavelengths)

8/16/32/40/48-Wavelength System Applications

For less than 48-wavelength system, ZXWM M920 whole network application is illustrated in Figure 19. Figure 19 Whole Network Application with the ZXWM M920 (the System less than 48-Wavelength)



27


OTM OTM

OTU 1 OTU 2

S1 l1

R M1 M1

S2 l2

R M2 M2

EDFA PA

Sn ln

OTM OTM

O M U

EDFA PA R'

EOBA

MPI-S

SD2 R 2 S'

EOLA

MPI-R

ln-1

OTU n

OAD OAD O O T T U U

R Mn

EOPA

O T U

EDFA Preamplifier

O T U

OSC

F C S O

OSCF

R 2 SD2

OTU 2

EDFA PA O D U

EOPA

EDFA LA

MPI-R S' MPI-R S'

EOLA

R' MPI-S

R n-1 SDn-1

OTU n

R n SDn

EOBA

OAD OAD

O O T T U U

n-1 OTU n

F C OSC S O

R 1 SD1

OTU 1

OTU 2

n-1 SDn-1 R n-1 OTU

OSC

OSCF

OTU 1

O D U

SDn R n OSC

OTU n-1

OADM

SD1 R 1

Sn-1 R Mn-1

OTU n-1

OLA

EDFA PA

O O T T U U

O M U

R M1 S 1 l1

OTU 1

R M2 S 2 l2

OTU 2

R Mn-1 S n-1 OTU ln-1 n-1 R Mn S n ln

OTU n

The module shown in the diagram is board in ZXWM M920. i

Working wavelength range and channel spacing

C band (191.3 THz ~ 196.0 THz) at 100 GHz channel spacing ii

System composition

•

OTM: Optical terminal equipment. As shown in Figure 32. OTU belongs to the optical transfer platform, OMU and ODU belong to the OM and OD platform, EOBA and EOPA belong to the optical amplifying platform, SOSC belongs to the monitoring platform. At the receiving end of the OTM, modules should be added for dispersion compensation after long distance transmission. The wavelength spacing transferred by OTU is 100 GHz.

•

OLA: Optical line amplifier, amplifier, including including EOLA and SOSC. As shown shown in Figure 32., EOLA belongs to the optical amplifying platform; SOSC belongs to the monitoring platform.

•

OADM: Optical add/drop multiplexer. As shown in Figure Figure 33, 33, OAD OAD belongs belongs to the add/drop platform, OTU belongs to the optical transfer platform, and SOSC belongs to the monitoring platform.

2

80/96-Wavelength System Applications

Take a unidirectional 2-segment transmission for example, and the whole network application of the 80/96-wavelength ZXWM M920 is ill ustrated ustrated in Figure 20. Figure 20

28

Whole Network Network Application with the ZXWM ZXWM M920 M920 (the System with 80/96-Wavelength)




OTM1 OTU . .

OTU . .

OMU C100_1

EOBA

OLA 100km G. 652

OTM2 100km G. 652

EOPA

OCI C50_1

DCM

OMU C100_2

EOPA

LAC

DCM EOBA

O S C

DRA

O S C

OPM

DRA

OTU . .

ODU C100_2

OTU . .

OCI C50_1

LAC EOBA

O S C

ODU C100_1

OPM



C band at 50 GHz spacing ii •

System composition

OTM: Optical terminal equipment

OTU: belongs to the optical transfer platform in Figure 32. OMU, ODU and OCI: The OM and OD platforms in Figure 33. OMU/ODU: Multiplex/de-multiplex Multiplex/de-multiplex C band (191.3 THz ~ 196.0 THz), THz) , C+ band (191.35 ( 191.35 THz ~ 196.05 THz), with the channel spacing of 100 GHz. OCI: By adopting the inter-leaver technology, it multiplexes/de-multiplexes multiplexes/de-multiplexes C band and C+ band, and integrates them into the C band multiplexing multiplexing signals with 50 GHz channel spacing. EOBA, EOPA: Belong to the optical optical amplifying platform in Figure 32. In an 80/96wavelength system, they amplify the C band signals. At the receiving end of the OTM, modules should be added for dispersion compensation and power balance after long distance transmission. SOSC: Monitoring platform in Figure 32. •

OLA: Optical line amplifier

EOBA and EOPA: Belong to the optical amplifying platform in Figure 32.. In 96/176wavelength systems, they amplify the C band and L band signals. SOSC and OPM: Belong to the m onitoring platform in Figure 32.. SOSC transmits and receives monitoring information, while OPM tests the optical performance of the optical interfaces. 3

160/176-Wavelength System Applications

Take a unidirectional 2-segment transmission for example, and the whole network application of the 160/176-wavelength ZXWM M920 is ill ustrated in Figure 21. Figure 21

Whole Network Application with the ZXWM M920 (160/176- Wavelength)



29


OTM1 OTU . .

OTU . .

OTU . .

OTU . .

OLA

OTM2

OMU C100_1

OPM OCI C50_1

OMU C100_2

OMU L100_1

O S C

OCI L50_1 OMU L100_2

DCM EOBA

EOPA

100km G. 652

OBM !C/L"

OBM !C/L"

EOBA

DRA

EOBA

O S C

DCM

OPM

LAC

100km G. 652

OBM !C/L"

OPM

LAC

EOPA

EOBA

LAC

DCM EOPA

OBM !C/L"

DRA

LAC

EOBA

OTU . .

ODU C100_2

OTU . .

ODU L100_1

OTU . .

ODU L100_2

OTU . .

OCI C50_1

O S C

DCM EOPA

EOBA

ODU C100_1

OCI L50_1

OPM



C+L band at 50 GHz spacing ii •

System composition

OTM: Optical terminal equipment OTU: belongs to the optical transfer platform in Figure 32.

OMU, ODU, OCI and OBM: The OM and OD platform in Figure 33. OMU/ODU: Multiplex/de-multiplex Multiplex/de-multiplex C band (191.3 THz ~ 196.0 THz), THz) , C+ band (191.35 ( 191.35 THz ~ 196.05 THz), L band (187.0 THz ~ 190.9 THz) and L+ band (186.95 THz ~ 190.85 THz) with the channel spacing of100 GHz. OCI: By adopting the inter-leaver technology, it multiplexes/de-multiplexes multiplexes/de-multiplexes C band and C+ band, L band and L+ band, and integrates them into the C band and L band multiplexing signals with 50 GHz channel spacing. OBM: At the transmitting end, the OBM feeds the amplified C/L band signals via the C/L pass band OM into the fiber. At the receiving end, it de-multiplexes the received signals into the C/L band multiplexing signals and sends them to the relevant amplifiers. amplifiers. EOBA and EOPA: Optical amplifying platform in Figure 32. I n 160/176-wavelength system, they amplify the C band and L band signals. At the receiving end of the OTM, modules should be added for dispersion compensation and power balance after long distance transmission. SOSC: Monitoring platform in Figure 32. •

OLA: Optical line amplifier. amplifier. Compared with the 40/48-wavelength 40/48-wavelength system, system, an OM part is added for C/L band signals.

OBM: Multiplexes/de-multiplexes Multiplexes/de-multiplexes signals of C/L band to the C band and L band. EOBA, DCM and EOPA: Optical amplifying platform in Figure 32. In 160/176-wavelength system, they amplify the C band and L band signals. Among them, DCM compensates dispersion for l ong distance transmission.

30




SOSC and OPM: Monitoring platform in Figure 32. SOSC transmits and receives monitoring information, while OPM tests the optical performance of the optical interfaces. 4

192-Wavelength System Applications

Take a unidirectional 2-segment transmission for example, and the whole network application of the 192-wavelength ZXWM M920 is illustrated in Figure 22. Figure 22 Whole Network Application with the ZXWM M920 (the System with 192-Wavelength)



C band at 25 GHz spacing ii •

System composition

OTM: Optical terminal equipment

OTU: belongs to the optical transfer platform in Figure 32. OMU, ODU, OCI: The OM and OD platform in Figure 33.



31


OMU/ODU: Multiplex/de-multiplex C1001 sub-band (191.300 THz ~ 196.000 THz), C1002 sub-band (191.350 THz ~ 196.050 THz), C1003 sub-band (191.325 THz ~ 196.025 THz) and C1003 sub-band (191.375 THz ~ 196.075 THz) with the channel spacing of100 GHz. OCI: OCI1 and OCI2, By adopting the inter-leaver technology, it multiplexes/de-multiplexes C1001 sub-band and C1002 sub-band, C1003sub-band and C1004 sub-band integrates them into the C band multiplexing signals with 50 GHz channel spacing. OCI3, By adopting the inter-leaver technology, it multiplexes/de-multiplexes C501 and C502 sub-band integrates them into the C band multiplexing signals with 25 GHz channel spacing EOBA and EOPA: Optical amplifying platform in Figure 32. I n 192-wavelength system, they amplify the C band signals. At t he receiving end of the OTM, modules should be added for dispersion compensation and power balance after long distance transmission. SOSC: Monitoring platform in Figure 32. SOSC and OPM: Monitoring platform in Figure 32. SOSC transmits and receives monitoring information, while OPM tests the optical performance of the optical interfaces.

3.2.2

Networking Modes To satisfy the need of various networking modes and f unctions, ZXWM M920 can be configured as an OTM, OADM and OLA. 1

Point-to-Point Networking

•

For short-haul transmission, ZXWM M920 can provide point-to-point network without OLA, as shown in Figure 23.

Figure 23

Point-to-Point Networking (Short-Haul)

OTM

•

OTM

For long-haul distance, trunk amplification mode is employed. An EOLA is added between OTMs, as shown in Figure 24, which consists of three optical amplifying segments.

Figure 24

Point-to-Point Networking (Long-Haul)

OTM

2

32

OLA

OLA

OTM

Chain Networking




The chain networking application with the OADM function is shown in Figure 25. Figure 25

Application of Chain Networking

OTM

3

OLA

OADM

OTM

Ring Networking

The ring networking application is shown in Figure 26. Figure 26

Application of Ring Networking

OADM OADM

OADM

OADM OADM

4

Ring-with-Chain Networking

The ring-with-chain networking application is shown in Figure 27.



33


Figure 27

Ring-with-Chain Networking

OADM

OADM

OTM

OLA

OADM

OADM

5

Cross Connection Networking

Cross connection networking is shown in Figure 28. Figure 28

Cross Connection Networking

OTM

OLA

OTM

OADM

OLA

OTM

OLA

OTM

3.3

Transmission Codes Supported By adopting the ultra-long-haul distance optical source and optical amplifying technologies, the transmission codes supported by ZXWM M920 are listed in the following Table 7 .

34




Table 7

The Transmission Codes Supported by 40 ×2.5 Gbit/s System

Category

Without FEC (OSNR > 20 dB)

FEC without RAMAN (OSNR>15dB)

FEC+ RAMAN (OSNR >15 dB)

Note:

Specifications

Target Distance (km)

1 × 36 dB

1 × 130 km

2 × 33 dB

2 × 120 km (240 km)

3× 31dB

3 × 112 km (336km)

10× 23 dB

10 ×84 km (840 km)

1 × 41 dB

1%149km

2 × 38 dB

2%138km (276km)

3× 36dB

3%130km (390km)

20 × 25dB

20%91km (1820km)

1 × 45dB

1%164km

2× 42dB

2%152km (304km)

3× 40dB

3%145km (435km)

20 × 28 dB

20%102km (2040km)

FEC indicates common FEC coding and decoding, AFEC is advanced FEC coding

and decoding, and ×

means that the channel difference should be included. Target

Distance is calculated at 0.275dB/km.

Table 8

The Transmission Codes Supported by 40 /48× 10 Gbit/s System

Category

AFEC NRZ

AFEC RZ

Note:

Specifications


remark

1 × 61 dB

1 × 244km

RPOA,40 ×10Gbit/s

1 × 49 dB

1 ×196km

DRA, 40 ×10Gbit/s

1 × 57 dB

1×228km

RPOA,48 ×10Gbit/s

1 × 48 dB

1 × 192 km

DRA, 48×10Gbit/s

30 × 22 dB

30 × 88 km

-

12 × 30 dB

12 × 120 km

-

1 × 64 dB

1 × 256km

RPOA,40 ×10Gbit/s

1 × 52 dB

1 ×208km

DRA, 40 ×10Gbit/s

1 × 60 dB

1×240km

RPOA,48 ×10Gbit/s

1 × 51 dB

1 × 204 km

DRA, 48 ×10Gbit/s

50 × 22 dB

50 × 88 km

-

18× 30 dB

18 × 120 km

-

FEC indicates common FEC coding and decoding, AFEC is advanced FEC coding

and decoding, and × means that the channel difference should be included. Target Distance is calculated at 0.275dB/km.



35


The Transmission Codes Supported by 80/96 × 10 Gbit/s System

Table 9

Category

AFEC NRZ

AFEC RZ

Note:

Specifications


remark

1 × 45 dB

1 ×180km

DRA, 80 ×10Gbit/s

1 × 44 dB

1 × 176km

DRA, 96×10Gbit/s

20 × 22 dB

20 × 88 km

-

8 × 30 dB

8 × 120 km

-

1 × 48 dB

1 ×192km

DRA, 80 ×10Gbit/s

1 × 47 dB

1 × 188km

DRA, 96 ×10Gbit/s

30 × 22 dB

30 × 88 km

-

12× 30 dB

12 × 120 km

-

FEC indicates the common FEC coding and decoding, AFEC is advanced FEC

coding and decoding, and ×



Table 10

The Transmission Codes Supported by 192 × 10 Gbit/s System

Category

AFEC NRZ

Specifications


remark

1 × 41 dB

1 ×164km

DRA

10 × 22 dB

10 × 88km

-

3 × 30 dB

3 × 120 km

-

Note: FEC indicates the common FEC coding and decoding, and AFEC is advanced FEC coding and decoding, and × means that the channel difference should be included. Target Distance is calculated at 0.275dB/km.

Table 11

The Transmission Codes Supported by 40/48× 40 Gbit/s System

Category

AFEC+ODB

AFEC+DPSK

Note:

36

Specifications


remark

1 × 45 dB

1 ×180km

DRA, 40 ×40Gbit/s

1 × 44 dB

1 × 176km

DRA, 48×40Gbit/s

14× 22 dB

14 × 88 km

-

3 × 30 dB

3 × 120 km

-

6 × 30 dB

6 × 120 km

DRA

1 × 47 dB

1 ×188km

DRA, 40 ×40Gbit/s

1 × 46 dB

1 × 184km

DRA, 48×40Gbit/s

22× 22 dB

22 × 88 km

-

5 × 30 dB

5 × 120 km

-

12 × 30 dB

12 × 120 km

DRA

FEC indicates the common FEC coding and decoding, and AFEC is advanced FEC




coding and decoding, and ×



Table 12

The Transmission Codes Supported by 80/96 × 40 Gbit/s System

Category

AFEC+ODB

AFEC+DPSK

Specifications


remark

1 × 42 dB

1 ×168km

DRA, 80 ×40Gbit/s

1 × 41 dB

1 × 164km

DRA, 96×40Gbit/s

7× 22 dB

7 × 88 km

-

3 × 30 dB

3 × 120 km

DRA

1 × 44 dB

1 ×176km

DRA, 80 ×40Gbit/s

1 × 43 dB

1 × 172km

DRA, 96×40Gbit/s

16× 22 dB

22 × 88 km

-

3× 30 dB

3 × 120 km

-

6× 30 dB

6 × 120 km

DRA

Note: FEC indicates the common FEC coding and decoding, and AFEC is advanced FEC coding and decoding, and × means that the channel difference should be included. Target Distance is calculated at 0.275dB/km.

4

System Architecture This chapter briefly introduces the overall structure of ZXWM M920, including hardware and software, and its applications.

4.1

Description of System Functional Platform he functional block diagram of ZXWM M920 is shown in Figure 29.



37


Figure 29 Functional Blocks of the ZXWM M920

ZXWM M920 Dense Wavelength Division Multiplexing Optical Transmission System

OTM, OADM and OLA

M p o l a n t i f t o o r m r i n g

O p t i p c a l l a a t f o m r m p l i f y i n g

A d d / d r o p p l a t f o r m

O p M l a a t f n o d r m O D

S e r v i p c l e a t f c o o n r m v e r g e n t

ZXONM E300

O p p t i l a c a t l f t o r r a mn s f e r

m a S n y a g s t e m e m e n t

Hardware s stem

m C a o n n f a i g g u e r m a e t i n o t n

m a n F a g a u e l m t e n t

m P a e n r f o a g r m e m a n e c n t e

mM a a n i n a g t e e n m a n e c n t e

m a S n e a g c u e r m t i e y n t

NM software system

ZXWM M920 consists of hardware system and NM software system, which are independent of each other and work coordinately. ZXWM M920 hardware system consists of optical transfer platform, service convergent platform, optical wavelength multiplexing (OM) and optical wavelength de-multiplexing (OD) platforms, add/drop platform, optical amplifying platform and monitoring platform.

4.1.1

Optical transfer platform It employs Optical/electric/optical conversion mode to convert wavelengths between the service signals and line signals. The service signals support the SDH signals at STM-1/4/16/64/256 rates, OC-3/12/48/ 192/768 and other service signals (i.e. POS, FC, FICON, ESCON, DVB, FDDI, FE, GbE, 10GbE, ATM and PDH) at the client side, satisfying the G.957, G691 and IEEE802.3 recommendation. The line signals are compliant with the G.692 recommendation.

4.1.2

Service convergent platform It converge multiple low-speed signals into one wavelength for transmission, and completes its reversion process. The low-speed signals include STM-1, STM-4, STM-16, STM-64 and GbE. The maximum rate at the line side is 43.018 Gbit/s.

38




4.1.3

OM/OD platform It consists of two parts: the OM and OD. 1

The OM: It couples and multiplexes multiple optical signals with different wavelengths from the optical transfer platform and service convergent platform i nto one fiber for transmission.

2

The OD: It separates the line optical signals from the optical amplifying platform by wavelengths, and sends them to different optical transfer platforms and service convergent platforms.

The OM and OD of ZXWM M920 employ C band with 100 GHz channel spacing in less than 40-wavelength transmission. The OM and OD of ZXWM M920 employ C/L band by using interleaver technology with 50 GHz channel spacing in 40-176-wavelength super-large capacity transmission. The OM and OD of ZXWM M920 employ C band by using interleaver technology with 25 GHz channel spacing in 192-wavelength super-large capacity transmission.

4.1.4

Add/drop platform It implements add/drop and multiplexing f unction for the wavelength of the optical line signals. The ZXWM M920 can be configured as a fix ed optical add/drop multiplexer (FOADM) or a reconfigurable optical add/drop m ultiplexer (ROADM) depending on whether the wavelengths to be added/dropped are fixed.

4.1.5

Optical amplifying platform It compensates optical signal power in long distance transmission with optical amplifying technology. Normally, it is located at the back and in front of the OM/OD platform, as well as in the middle of the li ne transmission. The optical amplifying part of ZXWM M920 employs C band EDFA in less than 40wavelength transmission. The optical amplifying platform of ZXWM M920 amplifIies the C band and L band respectively in 40-176-wavelength transmission. The amplifier types involve C band EDFA, L band EDFA, C+L band RAMAN/EDFA hybrid amplifiers.

4.1.6

Monitoring platform 1

It collects, handles and reports various information like platform configurations, alarms and performance to the NMS.

2

It receives the commands sent by the NMS and transfers them to the target board.

3

It transmits the NMS information with the specified monitoring optical channel. The wavelength of the monitoring channel is 1510 nm at 100Mbit/s.

The NM Software System is introduced in chapter 4.3



39


4.2

Hardware Architecture ZXWM M920 consists of OTU sub-rack, OA sub-rack and TMUX sub-rack. The board positions of these sub-racks are described in the following.

4.2.1

Sub-rack The board arrangement of the sub-rack is shown in Fi gure 30, and numbers indicated are the slot numbers. Figure 30 Board Slot Arrangement of OTU Sub-rack

4.2.2

Board Description Table 13

40

Board Description

Board Name

Description

Remarks

OTU

2.5Gb/s Optical transponder unit

Transforms the 2.5Gb/s optical signals into electrical signals, then transform the electrical signals into the required optical signals complying with G.692.

OTUF

2.5Gb/s Optical transponder unit with the FEC function

Performs the same the functions as the OTU, and conducts forward error correction (FEC) coding/decoding.

EOTU10G

Enhanced 10Gb/s optical transponder unit with FEC/AFEC

Realizes G.709 recommendation compliant wavelength conversion of 10Gb/s optical signals in one channel,




Board Name

Description

Remarks and conducts FEC/AFEC coding/decoding on the signal.

TST3

40Gb/s optical transponder unit with FEC/AFEC

Realizes STM256, OTU3 access, complaint with G.709 recommendation, supports wavelength conversion of 40Gb/s optical signals into one DWDM channel, and conducts FEC/AFEC coding/decoding on the signal.

MQT3

Multi 10G aggregation board

Realizes 4* STM64, 10GE LAN, OTU2, complaint with G.709 recommendation, and conducts FEC/AFEC coding/decoding on the signal

SRM41 SRM42

Sub-rate Multiplex Board

Realizes the multiplex/de-multiplex function of four STM-16 signals to one STM-64 signal.

Sub-rate multiplex Board

Realizes the multiplex/de-multiplex function of four STM-4/STM-1 signals to one STM-16 signal

GEM2

Gigabit Ethernet Multiplex Board

Multiplexes two IEEE802.3Z recommendation compliant standard GbE optical signals into one G.692-compliant optical signal.

GEMF

Gigabit Ethernet Multiplex Board with FEC function

Multiplexes two IEEE802.3Z recommendation compliant standard GbE into one G.692-compliant optical signal with FEC.

GEM8

Gigabit Ethernet Multiplex Board

Multiplexes eight IEEE802.3Z recommendation compliant standard GbE optical signals into one G.709-compliant optical signal.

Optical multiplex unit

Multiplex optical signals with different wavelengths to one fiber, and provides 8wave, 16-wave, 32-wave , 40-wave ,48wave and 80-wave multiplexers.

ODU

Optical de-multiplex unit

Separates optical signals of different channels in one fiber from each other, and provides 8-wave, 16-wave, 32-wave , 40wave ,48-wave and 80-wave demultiplexers.

OCI

Optical channel multiplex /de-multiplex interleaver board

Completes the multiplex/de-multiplex of the C band or L band channel interleave at the same time, applying in 80-wave system.

OBM

Broadband multiplex board

Multiplexes/de-multiplexes the C/L band signals and the 1510nm (1625nm) monitoring channel, applying in 160/176wave system.

EOBA

Enhanced Optical booster amplifier

It is equipped with the erbium-doped fiber amplifier (EDFA) to boost optical power of

OMU



41


Board Name

Description

Remarks signals. It is usually used at the transmitting end. It is equipped with the erbium-doped fiber

EOLA

Enhanced Optical line amplifier

amplifier (EDFA) to amplify optical signals. It is usually used at the optical relay segment. It is equipped with the erbium-doped fiber

EOPA

Enhanced Optical preamplifier

amplifier (EDFA) to pre-amplify optical signals. It is usually used at the r eceiving end.

EONA

Enhanced Optical node amplifier

It is equipped with the erbium-doped fiber amplifier (EDFA) to amplify optical signals. Feeds the Raman pump light to the

DRA

Distributed Raman amplifier

transmission fiber backward so as to achieve distributed amplification of the optical signal. The range of the amplified wavelength covers C Band and L Band.

Remote Pump Optical Amplifier RPOA

42

SOAD1

Optical add/drop multiplex Board of 1 Wavelength

SOAD2

Optical add/drop multiplex Board of 2 Wavelength

SOAD4

Optical add/drop multiplex board of 4 Wavelength

RPOA is new type optical amplification technology: the pump laser is put on OTM station, while gain unit is put on the indicated location of line optical fiber. When the pump light is transmitted through gain unit, it will be interacted with gain unit, thus realizes the amplification function to the signals.

Implements add/drop for 1 (channel/2 (channel/4 (channel, and pass-through wavelength.

WBU

Wavelength Blocking Unit

WBU (Wavelength Blocking Unit) board is configured in an ROADM (Reconfigurable Optical Add/Drop Multiplexer) subsystem to implement the reconfiguration of add/drop wavelengths. It makes the maintenance convenient when the add/drop wavelengths change.

WSU

Wavelength Selective Unit

WSU (Wavelength Selective Unit) board is configured in an ROADM (Reconfigurable Optical Add/Drop Multiplexer) subsystem to implement the




Board Name

Description

Remarks reconfiguration of add/drop wavelengths. It makes the maintenance convenient when the add/drop wavelengths change.

SOP

OPM

Optical protection board

Provides 1+1 protection for the optical multiplex section or optical c hannel mainly in the #concurrent sending/optimum receiving$ mode.

Optical performance monitoring board

Provides optical performance monitoring function for each optical channel with measuring parameters including optical power, central wavelength and optical S/N ratio and reports the corresponding data to the NMS.

Optical Wavelength Monitor OWM

OWM could automatic detect the abnormal wavelength shift of the OTU, and send adjustment command to the aim OTU until the wavelength shift is in the normal range.

SOSC

Optical supervision channel board

Receives 1510nm optical supervision signals from the adjacent NE and sends them to the SNP after the optical-toelectrical conversion, then receives electrical signals from the SNP and sends them to the adjacent NE after the generation of the 1510nm optical signals with supervision information.

SNP

Node Processor

Collects and processes alarm and performance information of the local NE.

SDM

Supervision add/drop multiplexer

Provides the function of combining the main path optical signal and monitoring signal.

LAC

Line Attenuation Compensator

Includes NM-controlled attenuator, it is configured at the end of line to m ake remote adjustment according to line fiber attenuation change.

Variable attenuation MUX

Multiplex unit with channel power prebalance. With AWG+VOA technique, it adjusts attenuations of channels, and then multiplexes them into one channel for output via voltage or curr ent control. Configured at OTM site, it can independently adjust optical power of each channel for channel power prebalance.

VMUX



43


4.3

The NM Software System Structure ZXWM M920 implements software management via Unitrans ZXONM E300 Element Management Platform for Unix/Windows (ZXONM E300 for short). It can perform various management functions for faults, performance, security, configuration, and m aintenance of the system. Designs for ZXONM E300 are based on a four-l ayered structure including the equipment layer, the NE layer, the NE management layer and the subnet management layer. It can also provide the Corba interface for the network management layer. The hierarchical structure of ZXONM E300 is shown in Figure 31.

44




Figure 31 The Hierarchical Structure of the Element Management Software

NMS NML

NMS

Corba

Corba

GUI(Cient) F Subnet Manager 3

Subnet management layer

F

F

GUI(Cient)

GUI(Cient) F LMT

NE/Subnet Manager 2

NEL Qx

NE/Agent

ECC NE/Agent

NE/Agent

3

NE/Agent

ECC

ECC NE/Agent

NEL

4.3.1

ECC

ECC

ECC

MCU

Qx

GNE/Agent

ECC

S

NE/Subnet Manager n

...

Qx

ECC NE/Agent

F

f

GNE/Agent

Equipment layer

F

F

NE/Subnet Manager 1

GUI(Cient)

S

S

MCU

MCU

NE/Agent S

...

MCU

ECC

GNE/Agent

S MCU

S

3 3..

MCU

Hierarchical structure 1

The equipment layer (MCU-Manager Control Unit)

The functions of the equipment layer are: •

Monitoring alarm and performance status of boards

•

Receiving EMS commands

•

Controlling boards to implement certain operations

2

The NE layer, which is the Agent in the EMS

The functions of the NE layer are:



45


•

Managing each NE

•

Configuring each board when NE is powered on for initialization

•

Monitoring alarm and performance status of whole NEs under normal running conditions

•

Receiving and processing the monitoring commands of NE manager layer through gateway NE (GNE)

3

The NE management layer (Manager): controls and coordinates a series of NEs, including Manager, graphical user interf ace (GUI) and Local Maintenance Terminal (LMT).

The functions of the NE management layer are: •

The core of the NE manager layer is the Manager (or Server), which can manage multiple subnets, control and coordinate NE equipment.

•

GUI provides graphic user interfaces and converts the requirements of user management into the commands of the internal formats and sends them down to the Manager.

•

LMT simply combines GUI and Manager via controlling user rights and software functional parts, provides some of NE management functions for local NEs commissioning and maintenance.

4

The subnet management layer: its structure is similar to that of NE management layer, and the NEs configuration and maintenance commands are indirectly performed through NE m anagement layer.

The subnet management system sends a command to the NE management system, via which forwards it to the NE. After then, the NE responds to the subnet management system through the NE management system. In addition, it can provide the network management layer with the Corba interface.

4.3.2

2

Interface description

1

Qx interface:

As shown in Fig 32, it is the interface between the Agent and the Manager, i.e., the interface between the SNP board and the computer where the Manager program resides. It complies with the TCP/IP. 2

F interface:

As shown in Fig 32, it is the interface between the GUI and the Manager, i.e., the interface between the GUI and the computer where the Manager program resides. It complies with the TCP/IP. 3

46

f interface:




As shown in Fig 32, it is the interface between the Agent and LMT, i.e. the interface between the SNP board and the local maintenance terminal. On the l ocal maintenance terminal, related NM software is installed. This interface complies with the TCP/IP. 4

S interface:

As shown in Fig 32, it is the interface between Agent and MCU, i.e., the communication interface between the SNP board and other boards. S interface adopts the point-to-multipoint communication mode based on the HDLC communication mechanism. 5

ECC interface:

As shown in Fig 32, it is the interface between Agents, i.e. the communication interface between NEs. It uses DCC for communication, supports customized communication protocol and standard protocol at the same time, and implements bridge function on Agent. Please refer to the element management manuals for more details.

4.4

System Configuration ZXWM M920 can be configured as the optical terminal m ultiplexer (OTM), the optical add/drop multiplexer (OADM) and optical line amplifier (OLA).

4.4.1

Optical Terminal Multiplexer (OTM) The OTM can add/drop all the services to im plement the line terminal node function. As an OTM, the relationship between platforms is illustrated in Figure 32. Figure 32

Functional Blocks of the OTM

Service signal

Optical transfer platform

Service signal

Service convergent platform

M u l i g t p l e x i n

D e m u l t i p l e x i n g

Multiplexer/demultiplexer platform

4.4.2

Optical line (sending) Optical line (receiving) Optical amplifier platform Monitoring platform

Optical Add/Drop Multiplexer (OADM) The ZXWM M920 supports both the Fix ed Optical Add/Drop Multiplexer (FOADM) function and the Reconfigurable Optical Add/Drop Multiplexer (ROADM) function. FOADM: This function is used to add/drop fixed wavelengths.



47


ROADM: Wavelengths to be added/ dropped can be reconfigured. In addition, the port assignment function is available when ROADM is enabled. The following port assignment function is controlled via the EMS. In an ROADM node, optical signals with special wavelengths can be assigned to any drop ports and then dropped through these ports. The wavelengths of these signals meet the specification of the drop ports assigned for them. On the other hand, the wavelengths of optical signals input from different add ports can be converted into the wavelengths of those optical signals having been dropped i n the same node. After that, these optical signals are added at the node. 1

FOADM equipment

The FOADM can add/drop the specified fixed wavelengths services and pass straight through other services. As an FOADM, the relationship between platforms is illustrated in Figure 33. Figure 33

Functional Blocks of the FOADM

OA platform

ADM platform

Straight through

OA platform

OL (East)

OL (West)

Service convergence Service convergence platform platform

Monitoring platform

Monitoring platform

OT platform Service signal

Service signal

2

ROADM equipment

Take bidirectional ROADM equipment that adds/drops eight wavelengths as example. Figure 34#Figure 35 and Figure 36 ill ustrates the optical connection in the equipment configured with WBU board #WBM board and WSU board respectively.

48




Figure 34

Optical Connection of ROADM Equipment with WBU Boards

OPA IN

EX OUT

EX IN

OBA

WB A1

OUT

WB

WBU OUT

OBA

A1

D1

WBU EX IN EX OUT

IN

D1

OPA

Figure 35 Optical Connection of ROADM Equipment with WBM Boards



49


Figure 36

4.4.3

Optical Connection of ROADM Equipment with WSU Boards

Optical Line Amplifier (OLA) The OLA is used to compensate the optical signal power for l ong distance transmission. As an OLA, the relationship between platforms is illustrated in Figure 37. Figure 37

OL (East)

Functional Blocks of the OLA

OA platform

in

out Monitoring platform

OL (West) out

in OA platform

50




5

Technical Specifications This chapter introduces technical indices of ZXWM M920, including structure, power supply, performances of boards and the system component indices of OMU/ODU, OADM, OA and OTU etc.

5.1

Working Wavelength Requirements The working wavelength of the system strictly complies with the specific central wavelength and central frequency values used in the multi-channel system, as specified in the ITU-T Recommendation G.692 and G.694.1. 1

When ZXWM M920 is a C band 40-wavelength system at 100 GHz spacing, the wavelength allocation is listed in Table 14 .

Table 14

The Wavelength Allocation based on C band 40 CH/100 GHz Spacing

S. N.

Central Frequency (THz)

Wavelength (nm)

1

192.1

1560.61

2

192.2

1559.79

3

192.3

1558.98

4

192.4

1558.17

5

192.5

1557.36

6

192.6

1556.55

7

192.7

1555.75

8

192.8

1554.94

9

192.9

1554.13

10

193.0

1553.33

11

193.1

1552.52

12

193.2

1551.72

13

193.3

1550.92

14

193.4

1550.12

15

193.5

1549.32

16

193.6

1548.51

17

193.7

1547.72

18

193.8

1546.92

19

193.9

1546.12

20

194.0

1545.32

21

194.1

1544.53

22

194.2

1543.73

23

194.3

1542.94

24

194.4

1542.14

25

194.5

1541.35



51


S. N.

Central Frequency (THz)

Wavelength (nm)

26

194.6

1540.56

27

194.7

1539.77

28

194.8

1538.98

29

194.9

1538.19

30

195.0

1537.40

31

195.1

1536.61

32

195.2

1535.82

33

195.3

1535.04

34

195.4

1534.25

35

195.5

1533.47

36

195.6

1532.68

37

195.7

1531.90

38

195.8

1531.12

39

195.9

1530.33

40

196.0

1529.55

2

When ZXWM M920 is a C band 192-wavelength system at 25 GHz spacing, the wavelength allocation is listed in Table 15 .

Table 15

52

The Wavelength Allocation based on C/C+ band 192 CH/ 25 GHz Spacing

Nominal Central Wavelength (nm)

S. N. C50-2

Nominal Central Frequency (THz)


S. N. C50-1


1

196.05

1529.16

1

196.075

1528.97

2

196.00

1529.55

2

196.025

1529.36

3

195.95

1529.94

3

195.975

1529.75

4

195.90

1530.33

4

195.925

1530.14

5

195.85

1530.72

5

195.875

1530.53

6

195.80

1531.12

6

195.825

1530.92

7

195.75

1531.51

7

195.775

1531.31

8

195.70

1531.90

8

195.725

1531.70

9

195.65

1532.29

9

195.675

1532.09

10

195.60

1532.68

10

195.625

1532.49

11

195.55

1533.07

11

195.575

1532.88

12

195.50

1533.47

12

195.525

1533.27

13

195.45

1533.86

13

195.475

1533.66

14

195.40

1534.25

14

195.425

1534.05

15

195.35

1534.64

15

195.375

1534.45





S. N. C50-2



S. N. C50-1


16

195.30

1535.04

16

195.325

1534.84

17

195.25

1535.43

17

195.275

1535.23

18

195.20

1535.82

18

195.225

1535.63

19

195.15

1536.22

19

195.175

1536.02

20

195.10

1536.61

20

195.125

1536.41

21

195.05

1537.00

21

195.075

1536.81

22

195.00

1537.40

22

195.025

1537.20

23

194.95

1537.79

23

194.975

1537.59

24

194.90

1538.19

24

194.925

1537.99

25

194.85

1538.58

25

194.875

1538.38

26

194.80

1538.98

26

194.825

1538.78

27

194.75

1539.37

27

194.775

1539.17

28

194.70

1539.77

28

194.725

1539.57

29

194.65

1540.16

29

194.675

1539.96

30

194.60

1540.56

30

194.625

1540.36

31

194.55

1540.95

31

194.575

1540.76

32

194.50

1541.35

32

194.525

1541.15

33

194.45

1541.75

33

194.475

1541.55

34

194.40

1542.14

34

194.425

1541.94

35

194.35

1542.54

35

194.375

1542.34

36

194.30

1542.94

36

194.325

1542.74

37

194.25

1543.33

37

194.275

1543.13

38

194.20

1543.73

38

194.225

1543.53

39

194.15

1544.13

39

194.175

1543.93

40

194.10

1544.53

40

194.125

1544.33

41

194.05

1544.92

41

194.075

1544.72

42

194.00

1545.32

42

194.025

1545.12

43

193.95

1545.72

43

193.975

1545.52

44

193.90

1546.12

44

193.925

1545.92

45

193.85

1546.52

45

193.875

1546.32

46

193.80

1546.92

46

193.825

1546.72

47

193.75

1547.32

47

193.775

1547.12

48

193.70

1547.72

48

193.725

1547.52

49

193.65

1548.11

49

193.675

1547.92

50

193.60

1548.51

50

193.625

1548.31

51

193.55

1548.91

51

193.575

1548.71



53


54


S. N. C50-2



S. N. C50-1


52

193.50

1549.32

52

193.525

1549.11

53

193.45

1549.72

53

193.475

1549.52

54

193.40

1550.12

54

193.425

1549.92

55

193.35

1550.52

55

193.375

1550.32

56

193.30

1550.92

56

193.325

1550.72

57

193.25

1551.32

57

193.275

1551.12

58

193.20

1551.72

58

193.225

1551.52

59

193.15

1552.12

59

193.175

1551.92

60

193.10

1552.52

60

193.125

1552.32

61

193.05

1552.93

61

193.075

1552.73

62

193.00

1553.33

62

193.025

1553.13

63

192.95

1553.73

63

192.975

1553.53

64

192.90

1554.13

64

192.925

1553.93

65

192.85

1554.54

65

192.875

1554.34

66

192.80

1554.94

66

192.825

1554.74

67

192.75

1555.34

67

192.775

1555.14

68

192.70

1555.75

68

192.725

1555.55

69

192.65

1556.15

69

192.675

1555.95

70

192.60

1556.55

70

192.625

1556.35

71

192.55

1556.96

71

192.575

1556.76

72

192.50

1557.36

72

192.525

1557.16

73

192.45

1557.77

73

192.475

1557.57

74

192.40

1558.17

74

192.425

1557.97

75

192.35

1558.58

75

192.375

1558.38

76

192.30

1558.98

76

192.325

1558.78

77

192.25

1559.39

77

192.275

1559.19

78

192.20

1559.79

78

192.225

1559.59

79

192.15

1560.20

79

192.175

1560.00

80

192.10

1560.61

80

192.125

1560.40

81

192.05

1561.02

81

192.075

1560.81

82

192.00

1561.42

82

192.025

1561.22

83

191.95

1561.83

83

191.975

1561.62

84

191.90

1562.24

84

191.925

1562.03

85

191.85

1562.64

85

191.875

1562.44

86

191.80

1563.05

86

191.825

1562.84

87

191.75

1563.46

87

191.775

1563.25





S. N. C50-2



S. N. C50-1


88

191.70

1563.87

88

191.725

1563.66

89

191.65

1564.27

89

191.675

1564.07

90

191.60

1564.68

90

191.625

1564.47

91

191.55

1565.09

91

191.575

1564.88

92

191.50

1565.5

92

191.525

1565.29

93

191.45

1565.91

93

191.475

1565.7

94

191.40

1566.32

94

191.425

1566.11

95

191.35

1566.73

95

191.375

1566.52

96

191.30

1567.14

96

191.325

1566.93

3

When ZXWM M920 is a C band 48/96-wavelength system at 100 GHz/50 GHz spacing, the wavelength allocation is listed in Table 16 .

Table 16

The Wavelength Allocation based on C/C+ band 48/96 CH/100 GHz/50 GHz Spacing

S. N.


1

196.05

2



S. N.


1529.16

49

193.65

1548.11

196.00

1529.55

50

193.60

1548.51

3

195.95

1529.94

51

193.55

1548.91

4

195.90

1530.33

52

193.50

1549.32

5

195.85

1530.72

53

193.45

1549.72

6

195.80

1531.12

54

193.40

1550.12

7

195.75

1531.51

55

193.35

1550.52

8

195.70

1531.90

56

193.30

1550.92

9

195.65

1532.29

57

193.25

1551.32

10

195.60

1532.68

58

193.20

1551.72

11

195.55

1533.07

59

193.15

1552.12

12

195.50

1533.47

60

193.10

1552.52

13

195.45

1533.86

61

193.05

1552.93

14

195.40

1534.25

62

193.00

1553.33

15

195.35

1534.64

63

192.95

1553.73

16

195.30

1535.04

64

192.90

1554.13

17

195.25

1535.43

65

192.85

1554.54

18

195.20

1535.82

66

192.80

1554.94



55


4

56

S. N.


19

195.15

20



S. N.


1536.22

67

192.75

1555.34

195.10

1536.61

68

192.70

1555.75

21

195.05

1537.00

69

192.65

1556.15

22

195.00

1537.40

70

192.60

1556.55

23

194.95

1537.79

71

192.55

1556.96

24

194.90

1538.19

72

192.50

1557.36

25

194.85

1538.58

73

192.45

1557.77

26

194.80

1538.98

74

192.40

1558.17

27

194.75

1539.37

75

192.35

1558.58

28

194.70

1539.77

76

192.30

1558.98

29

194.65

1540.16

77

192.25

1559.39

30

194.60

1540.56

78

192.20

1559.79

31

194.55

1540.95

79

192.15

1560.20

32

194.50

1541.35

80

192.10

1560.61

33

194.45

1541.75

81

192.05

1561.02

34

194.40

1542.14

82

192.00

1561.42

35

194.35

1542.54

83

191.95

1561.83

36

194.30

1542.94

84

191.90

1562.24

37

194.25

1543.33

85

191.85

1562.64

38

194.20

1543.73

86

191.80

1563.05

39

194.15

1544.13

87

191.75

1563.46

40

194.10

1544.53

88

191.70

1563.87

41

194.05

1544.92

89

191.65

1564.27

42

194.00

1545.32

90

191.60

1564.68

43

193.95

1545.72

91

191.55

1565.09

44

193.90

1546.12

92

191.50

1565.5

45

193.85

1546.52

93

191.45

1565.91

46

193.80

1546.92

94

191.40

1566.32

47

193.75

1547.32

95

191.35

1566.73

48

193.70

1547.72

96

191.30

1567.14

When ZXWM M920 is a C/C+ band 80-wavelength system at 50 GHz spacing, the wavelength allocation is listed in Table 17 .




Table 17

The Wavelength Allocation based on C/C+ band 80 CH/100 GHz Spacing

S. N.


1

196.05

2



S. N.


1529.16

41

194.05

1544.92

196.00

1529.55

42

194.00

1545.32

3

195.95

1529.94

43

193.95

1545.72

4

195.90

1530.33

44

193.90

1546.12

5

195.85

1530.72

45

193.85

1546.52

6

195.80

1531.12

46

193.80

1546.92

7

195.75

1531.51

47

193.75

1547.32

8

195.70

1531.90

48

193.70

1547.72

9

195.65

1532.29

49

193.65

1548.11

10

195.60

1532.68

50

193.60

1548.51

11

195.55

1533.07

51

193.55

1548.91

12

195.50

1533.47

52

193.50

1549.32

13

195.45

1533.86

53

193.45

1549.72

14

195.40

1534.25

54

193.40

1550.12

15

195.35

1534.64

55

193.35

1550.52

16

195.30

1535.04

56

193.30

1550.92

17

195.25

1535.43

57

193.25

1551.32

18

195.20

1535.82

58

193.20

1551.72

19

195.15

1536.22

59

193.15

1552.12

20

195.10

1536.61

60

193.10

1552.52

21

195.05

1537.00

61

193.05

1552.93

22

195.00

1537.40

62

193.00

1553.33

23

194.95

1537.79

63

192.95

1553.73

24

194.90

1538.19

64

192.90

1554.13

25

194.85

1538.58

65

192.85

1554.54

26

194.80

1538.98

66

192.80

1554.94

27

194.75

1539.37

67

192.75

1555.34

28

194.70

1539.77

68

192.70

1555.75

29

194.65

1540.16

69

192.65

1556.15

30

194.60

1540.56

70

192.60

1556.55

31

194.55

1540.95

71

192.55

1556.96

32

194.50

1541.35

72

192.50

1557.36

33

194.45

1541.75

73

192.45

1557.77

34

194.40

1542.14

74

192.40

1558.17

35

194.35

1542.54

75

192.35

1558.58



57


S. N.


36

194.30

37


S. N.


1542.94

76

192.30

1558.98

194.25

1543.33

77

192.25

1559.39

38

194.20

1543.73

78

192.20

1559.79

39

194.15

1544.13

79

192.15

1560.20

40

194.10

1544.53

80

192.10

1560.61

5

When ZXWM M920 is a L/L+ band 80-wavelength system at 50 GHz spacing, the wavelength allocation is listed in Table 18 .

Table 18

58


The Wavelength Allocation based on L/L+ band 80 CH/100 GHz Spacing

S. N.


1

190.90

2



S. N.


1570.42

41

188.90

1587.04

190.85

1570.83

42

188.85

1587.46

3

190.80

1571.24

43

188.80

1587.88

4

190.75

1571.65

44

188.75

1588.30

5

190.70

1572.06

45

188.70

1588.73

6

190.65

1572.48

46

188.65

1589.15

7

190.60

1572.89

47

188.60

1589.57

8

190.55

1573.30

48

188.55

1589.99

9

190.50

1573.71

49

188.50

1590.41

10

190.45

1574.13

50

188.45

1590.83

11

190.40

1574.54

51

188.40

1591.26

12

190.35

1574.95

52

188.35

1591.68

13

190.30

1575.37

53

188.30

1592.10

14

190.25

1575.78

54

188.25

1592.52

15

190.20

1576.20

55

188.20

1592.95

16

190.15

1576.61

56

188.15

1593.37

17

190.10

1577.03

57

188.10

1593.79

18

190.05

1577.44

58

188.05

1594.22

19

190.00

1577.86

59

188.00

1594.64

20

189.95

1578.27

60

187.95

1595.06

21

189.90

1578.69

61

187.90

1595.49

22

189.85

1579.10

62

187.85

1595.91




5.2

S. N.


23

189.80

24



S. N.


1579.52

63

187.80

1596.34

189.75

1579.93

64

187.75

1596.76

25

189.70

1580.35

65

187.70

1597.19

26

189.65

1580.77

66

187.65

1597.62

27

189.60

1581.18

67

187.60

1598.04

28

189.55

1581.60

68

187.55

1598.47

29

189.50

1582.02

69

187.50

1598.89

30

189.45

1582.44

70

187.45

1599.32

31

189.40

1582.85

71

187.40

1599.75

32

189.35

1583.27

72

187.35

1600.17

33

189.30

1583.69

73

187.30

1600.60

34

189.25

1584.11

74

187.25

1601.03

35

189.20

1584.53

75

187.20

1601.46

36

189.15

1584.95

76

187.15

1601.88

37

189.10

1585.36

77

187.10

1602.31

38

189.05

1585.78

78

187.05

1602.74

39

189.00

1586.20

79

187.00

1602.17

40

188.95

1586.62

80

186.95

1603.57

System Component Indices The schematic diagram of the system is illustrated in Figure 38, and meaning of each component and interface is listed in Table 19 .



59


Figure 38 Schematic Diagram of the DWDM System

TX1 TX2

TXn

f 1 Rm1 S1 f 2 Rm2 S2

SD1 R1 MPI - S OM / OA

RX1

MPI - R OD / OA

OA R'

S'

f n Rmn Sn

SD2 R2

RX2

SDn Rn

RXn

OSC RX1 RX2

RXn

R1 SD1 R2 SD2

Rn SDn

Table 19

60

OD / OA

S'

OA

R'

MPI - R

MPI - S

OM / OA

f1 S1 f2 S2 fn Sn

TX1 TX2

TXn

Meaning of Components and Interfaces of the DWDM System

Code

Description

TX1 ) TXn

The OTU for multiplexing paths 1 ) n

F1 ) fn

The wavelength occupied by multiplexing paths 1 ) n (in unit of frequency)

S1 ) Sn

Reference points on the optical fibre at the output optical connectors of the transmitters for channels 1...n respectiv ely

RM1 ) RMn

Reference points on the optical fibre j ust before the OM/OA input optical connectors for channels 1...n respectively

OM

Optical Multiplexer

OA

Optical amplifier

OD

Optical demultiplexer

MPI

Main optical channel

MPI-S

Reference point on the optical fibre just after the OM/OA output optical connector

MPI-R

Reference point on the optical fi bre justbefore the OA/OD input optical connector

R"

Reference pointon the optical fibre just before the line OA input optical connector

S"

Reference point just after the line OA output optical connector

SD1 ) SDn

Reference points at the OA/OD output optical connectors

R1 ) Rn

Reference points at the inputs to the receiver optical connectors.

RX1 ) RXn

The OTU for multiplexing paths 1 ) n

SOSC

Optical supervisory channel




5.3

OMU/ODU Performance Parameters The indices of OM and OM for ZXWM M920 are listed below: 1

OMU

The OMU indices of ZXWM M920 are listed in Table 20 .

Table 20

OMU Performance Parameters

Specifications (32 Channels) Item

Specifications (40 Channels)

Unit

Specificati ons (48 Channels)

Specifi cation s (80 Chann els)

Coupler Type

AWG Type

Film Filter Type

AWG Type

Film Filter Type

AWG Type

AWG Type

Insertion loss

dB

<17

<10

<10

<10

<10

<10

<10

Max. difference of insertion losses of channels

dB

<3

<3

<3

<3

<3

<3

<3

Channel spacing

GHz

100

100

100

100

100

100

50

Light reflectance

dB

>40

>40

>40

>40

>40

>40

>40

1529 ~1561 /1570 ~1605

1529 ~1561 /1570 ~1605

1529 ~1561 /1570 ~1605

1529 ~1568 /1570 ~1605

1529 ~1561 /1570 ~1605

Working wavelength range

nm

1529 ~1561

1529 ~1561 /1570 ~1605

Polarizationrelated loss

dB

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

Polarizationmode dispersion

ps

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

Temperature characteristic s

nm/° C

---

<0.005

---

<0.005

---

---

---

Note: 1529 nm ~ 1561 nm corresponds to the C band OMU, while 1570nm ~ 1605 nm corresponds to the L band OMU. 2

VMUX

Configured at OTM site, VMUX can independently adjust optical power of each channel to pre-weight channel power. The performance parameters of ZXWM M920 VMUX are listed in Table 21 .



61


Table 21

The VMUX Performance Parameters

Item

Unit

Specification

Number of channels

---

40/48

Channel spacing

GHz

100


nm

1529 ~ 1568 / 1570 ~ 1605

-1dB bandwidth

nm

> 0.2

Insertion loss (@0dB VOA)

dB

<8

Polarization-mode dispersion

ps

0.5

Polarization-related loss

dB

0.8

Reflection factor

dB

> 40

Channel adjustment range

dB

0~10

VOA adjustment accuracy

dB

< 0.5

3

ODU

The performance parameters of ZXWM M920 ODU are listed in Table 22 .

Table 22

Item

Unit

ODU Performance Parameters

Specificatio ns (48 Channels)

Specif icatio ns (80 Chann els)



AWG Type

Film Filter Type

AWG Type

Film Filter Type

AWG Type

AWG Type

Insertio n loss

dB

< 10

< 10

< 10

< 10

< 10

< 10

Max. differen ce of insertio n losses of channel s

dB

<3

<3

<3

<3

<3

<3

Channe l spacing

GHz

100

100

100

100

100

50

Light reflecta nce

dB

> 40

> 40

> 40

> 40

> 40

> 40

nm

1529~15 61 / 1570~16

1529~1561 / 1570~1625

1529~1561 / 1570~1605

1529~156 1 /1570~160 5

1529~1568 / 1570~1605

1529~ 1561 / 1570~

Workin g wavele ngth range

62




Item

Unit



AWG Type

AWG Type

Film Filter Type

Film Filter Type

Specificatio ns (48 Channels)

Specif icatio ns (80 Chann els)

AWG Type

AWG Type

05

1605

Separat ion of adjacen t channel s

dB

> 25

> 25

> 25

> 25

> 25

> 25

Separat ion of nonadjacen t channel s

dB

> 30

> 30

> 30

> 30

> 30

> 30

Polariza tionrelated loss

dB

< 0.5

< 0.5

< 0.5

< 0.5

< 0.5

< 0.5

Polariza tionmode dispersi on

ps

< 0.5

< 0.5

< 0.5

< 0.5

< 0.5

< 0.5

Temper ature charact eristics

nm/°C

< 0.005

---

< 0.005

---

< 0.005

< 0.005

-1dB bandwi dth

nm

> 0.3

> 0.3

> 0.3

> 0.3

> 0.3

> 0.3

Note: 1529 nm ~ 1561 nm corresponds to the C band ODU, while 1570 nm ~ 1605 nm corresponds to the L band ODU. 4

50 GHz / 100 GHz Inter-leaver

The performance parameters of 50 GHz /100 GHz Inter-leaver for ZXWM M920 are listed in Table 23 .

Table 23

50 GHz / 100 GHz Inter-leaver Performance Parameters

Item

Unit

Specification

C band wavelength range

nm

1529 ~ 1568

L band wavelength range

nm

1570 ~ 1605



63


5

Item

Unit

Specification

Input optical power range

dBm

< +23

Input wavelength spacing

GHz

100

Output wavelength spacing

GHz

50

Insertion loss

dB

<3


dB

<2

Light reflectance

dB

> 40

Separation of adjacent channels

dB

> 25

Separation of non-adjacent channels

dB

> 25


dB

< 0.5


ps

< 0.5

-1dB bandwidth

nm

> 0.1

25 GHz / 50 GHz Inter-leaver

The performance parameters of 25 GHz /50 GHz Inter-leaver for ZXWM M920 are listed in Table 24 .

Table 24

6

25 GHz /50 GHz Inter-leaver Performance Parameters

Item

Unit

Specification


THz

191.125~196.10

Input optical power range

dBm

< +23

Input wavelength spacing

GHz

50

Output wavelength spacing

GHz

25

Insertion loss

dB

<3


dB

<2

Return Loss

dB

> 40

Isolation of adjacent channels

dB

> 25

Isolation of non-adjacent channels

dB

> 30

Polarization dependent loss (PDL)

dB

< 0.5

Polarization mode dispersion (PMD)

ps

< 0.2

-1dB bandwidth

nm

> 20

C/L band broadband OMU/ODU

The performance parameters of the C /L band broadband OMU/ODU for ZXWM M920 are listed in Table 25 .

Table 25

64

C/L Band OMU/ODU Performance Parameters

Item

Unit

Specification


nm

1529 ~ 1568




Item

Unit

Specification

L band wavelength range

nm

1570 ~ 1605

C band insertion loss

dB

< 1.5

L band insertion loss

dB

< 1.5

Light reflectance

dB

> 40


dB

< 0.5


ps

< 0.5

7

OMU80 & OMU40 (coupler) performance

The performance parameters of the OMU80 &OMU40 (coupler) for ZXWM M920 are listed in Table 26 .

Table 26

ODU80 & OMU40!coupler "Performance Parameters

Item

Unit

Parameter OMU80

Parameter OMU40

Central Wavelength

nm

1550

1550

Pass-band

nm

±40

±40

Splitter Ratio

%

1:80

1:40

1×80

1×40

dB

<22.71

<18.91

dB

>3.5

>2.02

Optical Return Loss

dB

>45

>45

Directivity

dB

>50

>50

Polarization Sensitivity

dB

<0.7

<0.6

TDL(Temperature Dependent Loss)

dB

<0.7

<0.6

Operation Temperature

4

-15~ +70

-15~ +70

Storage Temperature

4

-40~ +85

-40~ +85

Configuration Type Insertion Loss Insertion Loss

uniformity

Notes: 1 Insertion loss includes connectors. 2 Insertion Uniformity should be less than 2dB within 1550±5nm, while 3dB within1529-1568nm. 8

PDU

Table 27

performance

The performance parameters of PDU-4-X are listed in following table

Item


Unit

Indices


PDU-4-X

65


Item

Unit

Indices

PDU-4-X

1529~1561!C-band" wavelength range

Nm

1529~1568!CE-band" 1570~1605!L-band"

Insertion Loss

dB

<8.0


dB

<0.4

Optical Return Loss

dB

>40

Table 28

INx5Ox-1/2/3/4


Item

Indices !PDU-5-X"

Unit

1529~1561!C-band" wavelength range

Nm

1529~1568!CE-band" 1570~1605!L-band"

INx5Ox1/2/3/4

dB

<12.0

INx5Dx

dB

<4.0


dB

<0.5

Optical Return Loss

dB

>40

Insertion Loss

Table 29


Item

Unit

Indices

wavelength range

Nm

1529~1561!C-band"

PDU-8-X

1529~1568!CE-band" 1570~1605!L-band" Insertion Loss

dB

<11.0


dB

<0.5

Optical Return Loss

dB

>40

Table 30

INx5Ox1/2/3/4/5/6/7/8


Item

Unit

Indices

wavelength range

Nm

1529~1561!Cband"

PDU-9-X

1529~1568!CEband" 1570~1605!L-band" Insertion Loss

66

INx5Ox1/2/3/4/5/6/7/8

dB

<15.0




dB

<4.0


dB

<0.5

Optical Return Loss

dB

>40

INx5Dx

Table 31


Item

Unit

wavelength range

Nm

Indices PDU-16-X 1529~1561!Cband" 1529~1568 !CE-band" 1570~1605!Lband"

Insertion Loss

5.4

dB

<14.0


dB

<0.5

Optical Return Loss

dB

>40

INx5Ox1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16

WSUA/WSUD & WBU Performance Parameters The performance parameters of WBU are listed in Table 32 .

Table 32

WBU Performance Parameters

Item

Unit

Specification

Optical Spectrum range

nm

1529~1568

Channel spacing

GHz

Channel quantity

-

40/48 80/96

A1/A2-OUT

dB

<1.5

IN-D1/D2

dB

<4

EXIN-OUT

dB

<14

IN-EXOUT

dB

<4

Attenuation tunable range

dB

0~15

Attenuation tunable precision(ER)

dB

<0.5

Blocked extinction ratio

dB

>35

Return loss

dB

>40

Maximum total input optical power

dBm

625

Maximum Single-channel input optical power

dBm

616

Straight insertion loss


100 50


67


The performance parameters of WSUA/WSUD for ZXWM M920 are listed in Table 33 .

Table 33

WSUA/WSUD Performance Parameters

Item

Unit

Optical Spectrum range

nm

Channel spacing

GHz

Channel quantity

-

Specification WSUD

WSUA

1529~1561

1529~1561

100

100

50

50

40

40

80

80

A1-OUT

dB

<2

<2

A2-OUT

dB

<10

<10

IN-D1~D8

dB

<6

<6

EXIN-OUT

dB

<9

<6

dB

<6 !WSUD/MA1" <16 !WSUD/MA2"

<9 !WSUA/MD1" <16 !WSUA/MD2"

Attenuation tunable range

dB

0~15

0~15

Attenuation tunable precision(ER)

dB

<0.5

<0.5

Blocked extinction ratio

dB

>35

>35

Return loss

dB

>40

>40

Maximum total input optical power

dBm

625

625

Maximum Single-channel input optical power

dBm

616

616

Straight insertion loss

IN-EXOUT

The performance parameters of WBM are listed in Table 34 .

Table 34

WBM Performance Parameters

Item

Unit

Specification

Optical spectrum range

nm

1529-1561

Channel spacing

GHz

100

Channel quantity

-

40

dB

<8

IN-DROP

dB

<7

EXIN-OUT

dB

<13

IN-EXOUT

dB

<3

dB

0-15

An-OUT (n=1-40) insertion loss

Attenuation adjustment range

68




Item

5.5

Unit

Specification

Attenuation adjustment precision

dB

< (0.5 or &10% of the adjustment precision, select the larger one)

Return loss

dB

>40

OADM Performance Parameters The OADM of ZXWM M920 is used to add/drop 4 or 8-wavelength signals. Take the C band 8-wavelength OADM for example, its m ain performance parameters are listed in Table 35 .

Table 35

OADM Performance Parameters

Name

Specification

Unit

Central frequency range

191.3~196.0

THz

Central channel range

1529.16 ~1567.14

nm

- 0.5dB bandwidth

> 0.2

nm

- 20dB bandwidth

<1.2

nm

Channel spacing

100

GHz

Number of add/drop channels

8/4

---

Between In-Drop and adjacent channel

> 25

dB

Between In-Drop and non- adjacent channel

>35

dB

Between In-Midl and Drop

>14

dB

Between In-Out and Drop

> 28

dB

Optical return loss

>40

dB

Directivity

> 60

dB

In-drop

<4.0

dB

Add-out

<4.0

dB

In-out

<6.0

dB

Working relative humidity

5 ~95

%RH

Max. allowed optical power

<500

mW

Isolatio n

Insertio n loss

5.6

OA Parameters To smoothly upgrade 2.5 Gbit/s system to 10 Gbit/s system, ZXWM M920 OA is compatible with both 2.5 Gbit/s and 10 Gbit/s system. 1

The EOBA (Enhanced Optical Booster Amplifier)



69


•

40-channel C/L band optical booster amplifiers

As shown in Table 36 .the single channel power is applicable to 40-channel system.

Table 36

Item

Unit

C/L band EOBA Performance Parameters of the 40-channel

Indices (40-channel system) EOBA17/17

EOBA27/26

EOBA22/20

EOBA20/20

EOBA24/24

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605(L band)


nm

1529~1561 (C band) 1570~1605 (L band)

Total input power range

dBm

- 32 ~0

- 32 ~- 1

- 32 ~- 2

- 32 ~0

- 32 ~0

Input power range of the channel

dBm

- 32 ~- 16

- 32 ~- 17

- 32~ - 18

- 32 ~- 16

- 32 ~- 16

Output power range of the channel

dBm

1~4

10~13

4~7

4~7

8~11

Total output power range

dBm

1~17

10~26

4~20

4~20

8~24

Max. total output power

dBm

17

26

20

20

24

Noise coefficient

dB

<6

<6

<6

<6

<6


dB

<0.5

<0.5

<0.5

<0.5

<0.5

Pump leak at input

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

Pump leak at output

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

Input reflectance

dB

>40

>40

>40

>40

>40

Output reflectance

dB

>40

>40

>40

>40

>40

Channel gain

dB

17

27

22

20

24

Max. bearable reflectance at input

dB

>30

>30

>30

>30

>30

Max. bearable reflectance at output

dB

>30

>30

>30

>30

>30

Gain flatness

dB

&1

&1

&1

&1

1

Gain

ms

<10

<10

<10

<10

<10

70




Item

Unit


EOBA27/26

EOBA22/20

EOBA20/20

EOBA24/24

<0.5

<0.5

<0.5

<0.5

<0.5

response time when channels are added or reduced (stable state) Polarizationmode dispersion

ps

•

80-channel C/L band optical booster amplifiers

As shown in Table 37 , the single channel power is applicable to 80-channel system.

Table 37

Item

Unit

C/L band EOBA Performance Parameters of the 80-channel


EOBA27/26

EOBA22/20

EOBA20/20

EOBA24/24

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605(L band)


nm

1529~1561 (C band) 1570~1605 (L band)


dBm

- 32 ~ 0

- 32 ~ - 1

- 32 ~ - 2

- 32 ~ 0

- 32 ~ 0


dBm

- 32 ~ - 19

- 32 ~ - 20

- 32 ~ - 21

- 32 ~ - 19

- 32 ~ - 19


dBm

-2~1

7~10

1~4

1~4

5~8


dBm

-2~17

7~26

1~20

1~20

5~24


dBm

17

26

20

20

24

Noise coefficient

dB

<6

<6

<6

<6

<6


dB

<0.5

<0.5

<0.5

<0.5

<0.5

Pump leak at input

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

Pump leak at output

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

Input reflectance

dB

>40

>40

>40

>40

>40

Output reflectance

dB

>40

>40

>40

>40

>40



71


Item

Unit

Channel gain


EOBA27/26

EOBA22/20

EOBA20/20

EOBA24/24

dB

17

27

22

20

24


dB

>30

>30

>30

>30

>30


dB

>30

>30

>30

>30

>30

Gain flatness

dB

&1

&1

&1

&1

&1

Gain response time when channels are added or reduced (stable state)

ms

<10

<10

<10

<10

<10


ps

<0.5

<0.5

<0.5

<0.5

<0.5

•

48-channel C band optical booster amplifiers


Table 38

72

C band EOBA Performance Parameters of the 48-channel

Item

Unit

Operating wavelength range


EOBA23/21

EOBA26/24

EOBA28/26

nm

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)


dBm

-32 to 0

-32 to -2

-32 to -2

-32 to -2

Channel input power range

dBm

-32 to -17

-32 to -19

-32 to -19

-32 to -19

Channel output power range

dBm

0 to 3

4 to 7

7 to 10

9 to 12


dBm

0 to 17

4 to 21

7 to 24

9 to 26

Maximum total output power

dBm

17

21

24

26

Noise figure

dB

<6

<6

<6

<6

Polarization dependent loss

dB

<0.5

<0.5

<0.5

<0.5




Item

Unit

Pump leakage at input


EOBA23/21

EOBA26/24

EOBA28/26

dBm

<-30

<-30

<-30

<-30

Pump leakage at output

dBm

<-30

<-30

<-30

<-30

Input return loss

dB

>40

>40

>40

>40

Output return loss

dB

>40

>40

>40

>40

Channel gain

dB

17

23

26

28

Allowed Maximum input reflectance

dB

>30

>30

>30

>30

Allowed maximum output reflectance

dB

>30

>30

>30

>30

Gain flatness

dB

&1

&1

&1

&1

Gain response time while adding/reducing channels (stable status)

ms

<10

<10

<10

<10

Polarization mode dispersion

ps

<0.5

<0.5

<0.5

<0.5

•

96-channel C band optical booster amplifiers


Table 39

C band EOBA Performance Parameters of the 96-channel

Item

Unit



EOBA23/21

EOBA26/24

EOBA28/26

nm

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)


dBm

-32 to -3

-32 to -5

-32 to -5

-32 to -5


dBm

-32 to -20

-32 to -22

-32 to -22

-32 to -22


dBm

-3 to 0

1 to 4

4 to 7

6 to 9


dBm

-3 to 17

1 to 21

4 to 24

6 to 26


dBm

17

21

24

26



73


Item

Unit

Noise figure


EOBA23/21

EOBA26/24

EOBA28/26

dB

<6

<6

<6

<6


dB

<0.5

<0.5

<0.5

<0.5


dBm

<-30

<-30

<-30

<-30


dBm

<-30

<-30

<-30

<-30

Input return loss

dB

>40

>40

>40

>40

Output return loss

dB

>40

>40

>40

>40

Channel gain

dB

17

23

26

28

Allowed Maximum input reflectance

dB

>30

>30

>30

>30


dB

>30

>30

>30

>30

Gain flatness

dB

&1

&1

&1

&1


ms

<10

<10

<10

<10


ps

<0.5

<0.5

<0.5

<0.5

2

The EOLA (Enhanced Optical Line Amplifier)

•

40/80-channel C/L band optical line amplifiers

The performance parameters of the 40/80-channel C/L band EOLA are listed in Table 40 .

Table 40

Item

Unit

EOLA Performance Parameters of the 40/80-channel System

Indices (40-channel system) EOLA22/20

EOLA27/20

EOLA32/20

EOLA22/20

EOLA27/20

EOLA32/20

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

1529~1561 (C band) 1570~1605 (L band)

-29 to -7

-34 to -12

-27 to -2

-32 to -7

-37 to -12


nm

1529~1561 (C band) 1570~1605 (L band)


dBm

-24 to -2

74

Indices (80-channel system)




Item

Unit




EOLA22/20

EOLA27/20

EOLA32/20

EOLA22/20

EOLA27/20

EOLA32/20

dBm

-24 to -18

-29 to -23

-34 to -28

-27 to -21

-32 to -26

-37 to -31


dBm

1-7

1-7

1-7

-2 to 4

-2 to 4

-2 to 4


dBm

1-20

1-20

1-20

-2 to 20

-2 to 20

-2 to 20


dBm

20

20

20

20

20

20

Noise coefficient

dB

<6

<6

<6

<6

<6

<6


dB

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

Pump leak at input

dBm

<-30

<-30

<-30

<-30

<-30

<-30

Pump leak at output

dBm

<-30

<-30

<-30

<-30

<-30

<-30

Input reflectance

dB

>40

>40

>40

>40

>40

>40

Output reflectance

dB

>40

>40

>40

>40

>40

>40

Channel gain

dB

22

27

32

22

27

32


dB

>30

>30

>30

>30

>30

>30


dB

>30

>30

>30

>30

>30

>30

Gain flatness

dB

1

1

1

1

1

1


Ms

<10

<10

<10

<10

<10

<10


Ps

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

3

EOPA (Optical preamplifier)

•

40-channel C/L band optical preamplifiers



75


The performance parameters of the 40-channel C/L band optical preamplifiers are listed in Table 41 .

Table 41

Optical Preamplifier Performance Parameters of the 40-channel System

Item

Unit

Channels allocation

EOPA17/17

EOPA22/17

EOPA27/17

nm

1529~1561/ 1570~1605

1529~1561/ 1570~1605

1529~1561/ 1570~1605


dBm

-35~3

-35~-2

-35~-7


dBm

-35~-16

-35~-21

-35~-26


dBm

-2 to 4

-2 to 4

-2 to 4


dBm

-2 to 17

-2 to 17

-2 to 17


dBm

17

17

17

Noise coefficient

dB

<5.5

<5.5

<5.5


dB

<0.5

<0.5

<0.5

Pump leak at input

dBm

<-30

<-30

<-30

Pump leak at output

dBm

<-30

<-30

<-30

Input reflectance

dB

>40

>40

>40

Output reflectance

dB

>40

>40

>40

Channel gain

dB

17

22

27


dB

>30

>30

>30


dB

>30

>30

>30

dB

&1

&1

&1

ms

<10

<10

<10

Gain flatness Gain response time when channels are

76





Item

Unit

Indices (40-channel system) EOPA17/17

EOPA22/17

EOPA27/17

<0.5

<0.5

<0.5

added or reduced (stable state) Polarizationmode dispersion •

ps

80-channel C/L band optical preamplifiers

The performance parameters of the 80-channel C/L band optical preamplifiers are listed in Table 42 .

Table 42


Item

Unit

Channels allocation


EOPA22/17

EOPA27/17

nm

1529~1561/ 1570~1605

1529~1561/ 1570~1605

1529~1561/ 1570~1605


dBm

-35~0

-35~-5

-35~-10


dBm

-35~-19

-35~-24

-35~-29


dBm

-5to 1

-5 to 1

-5 to 1


dBm

-5 to 17

-5 to 17

-5 to 17


dBm

17

17

17

Noise coefficient

dB

<5.5

<5.5

<5.5


dB

<0.5

<0.5

<0.5

Pump leak at input

dBm

<-30

<-30

<-30

Pump leak at output

dBm

<-30

<-30

<-30

Input reflectance

dB

>40

>40

>40

Output reflectance

dB

>40

>40

>40

Channel gain

dB

17

22

27

Max. bearable

dB

>30

>30

>30



77


Item


Unit

EOPA17/17

EOPA22/17

EOPA27/17

dB

>30

>30

>30

dB

&1

&1

&1


ms

<10

<10

<10


ps

<0.5

<0.5

<0.5

reflectance at input Max. bearable reflectance at output Gain flatness

•

48-channel C band optical preamplifiers

The performance parameters of the 48-channel C band optical preamplifiers are listed in Table 43 .

Table 43

78


Item

Unit



EOPA22/17

EOPA27/17

nm

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)


dBm

-35 to 0

-35 to -5

-35 to -10


dBm

-35 to -17

-35 to -22

-35 to -27


dBm

0 to 3

0 to 3

0 to 3


dBm

0 to 17

0 to 17

0 to 17


dBm

17

17

17

Noise figure

dB

<5.5

<5.5

<5.5


dB

<0.5

<0.5

<0.5


dBm

<-30

<-30

<-30




•

Item

Unit



EOPA22/17

EOPA27/17

dBm

<-30

<-30

<-30

Input return loss

dB

>40

>40

>40

Output return loss

dB

>40

>40

>40

Channel gain

dB

17

22

27

Allowed maximum input reflectance

dB

>30

>30

>30


dB

>30

>30

>30

Gain flatness

dB

&1

&1

&1

Gain response time while adding/ reducing channels (stable status)

ms

<10

<10

<10


ps

<0.5

<0.5

<0.5

96-channel C band optical preamplifiers

The performance parameters of the 96-channel C band optical preamplifiers are listed in Table 44 .

Table 44


Item

Unit



EOPA22/17

EOPA27/17

nm

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)


dBm

-35 to -3

-35 to -8

-35 to -13


dBm

-35 to -20

-35 to -25

-35 to -30


dBm

-3 to 0

-3 to 0

-3 to 0


dBm

-3 to 17

-3 to 17

-3 to 17


dBm

17

17

17

Noise figure

dB

<5.5

<5.5

<5.5


dB

<0.5

<0.5

<0.5


dBm

<-30

<-30

<-30

Pump leakage at

dBm

<-30

<-30

<-30



79


Item

Unit


EOPA22/17

EOPA27/17

output Input return loss

dB

>40

>40

>40

Output return loss

dB

>40

>40

>40

Channel gain

dB

17

22

27


dB

>30

>30

>30


dB

>30

>30

>30

Gain flatness

dB

&1

&1

&1

Gain response time while adding/ reducing channels (stable status)

ms

<10

<10

<10


ps

<0.5

<0.5

<0.5

4

EONA (Enhanced Optical Node Amplifier)

•

40/80 channel C Enhanced Optical Node Amplifier

The performance parameters of the 40/80-channel C/L band optical Node amplifiers are listed in Table 45 .

Table 45

Item

Unit

EONA Performance Parameters of the 40/80-channel System



EONA25/20

EONA33/20

EONA27/24

EONA25/20

EONA33/20

EONA27/24

1529~1567

1529~1567

1529~1567

1529~1567

1529~1567

1529~1567

!C-band" 1570~1605

!C-band" 1570~1605

!C-band" 1570~1605

!C-band" 1570~1605

!C-band" 1570~1605

!C-band" 1570~1605

!L-band"

!L-band"

!L-band"

!L-band"

!L-band"

!L-band"


nm


dBm

- 32~0

- 32~- 8

- 32~2

- 35~0

- 35~- 8

- 35~2


dBm

- 32~- 16

- 32~- 24

- 32~- 14

- 35~- 19

- 35~- 27

- 35~- 17


dBm

1~7

1~7

8~11

-2~4

-2~4

5~8


dBm

1~20

1~20

8~24

-2~20

-2~20

5~24


dBm

20

20

24

20

20

24

Noise

dB

20~22: 8.0

28~30: 6.5

22~24: 8.5

20~22: 8.0

28~30: 6.5

22~24: 8.5

80




Item

Unit

coefficient



EONA25/20

EONA33/20

EONA27/24

EONA25/20

EONA33/20

EONA27/24

22~25: 7.0 25~30: 6.5

30~38: 6.0

24~27: 7.5 27~32: 6.5

22~25: 7.0 25~30: 6.5

30~38: 6.0

24~27: 7.5 27~32: 6.5


dB

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

Pump leak at input

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

<- 30

Pump leak at output

dBm

<- 30

<- 30

<- 30

<- 30

<- 30

<- 30

Input reflectance

dB

>40

>40

>40

>40

>40

>40

Output reflectance

dB

>40

>40

>40

>40

>40

>40

Channel gain

dB

25

33

27

25

33

27


dB

>27

>27

>27

>27

>27

>27


dB

>27

>27

>27

>27

>27

>27

Gain flatness

dB

71

71

71

71

71

71


ms

<10

<10

<10

<10

<10

<10


ps

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

•

48/96-channel C Enhanced Optical Node Amplifier

The performance parameters of the 48/96-channel C band optical Node amplifiers are listed in Table 46 .

Table 46

Item

Unit


nm

EONA Performance Parameters of the 48/96-channel System

Indices (48-channel system))


EONA25/21

EONA33/21

EONA27/24

EONA25/21

EONA33/21

EONA27/24

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)

1529-1568 (C-band)



81




EONA25/21

EONA33/21

EONA27/24

EONA25/21

EONA33/21

EONA27/24

dBm

-35 to 1

-35 to -7

-35 to 2

-35 to -2

-35 to -10

-35 to -1


dBm

-35 to -16

-35 to -24

-35 to -15

-35 to -19

-35 to -27

-35 to -18


dBm

4 to 7

4 to 7

7 to 10

-2 to 4

-2 to 4

4 to 7


dBm

4 to 21

4 to 21

7 to 24

-2 to 21

-2 to 21

4 to 24


dBm

21

21

24

21

21

24

Noise figure

dB

20~22: 8.0 22~25: 7.0 25~30: 6.5

28~30: 6.5 30~38: 6.0

22~24: 8.5 24~27: 7.5 27~32: 6.5

20~22: 8.0 22~25: 7.0 25~30: 6.5

28~30: 6.5 30~38: 6.0

22~24: 8.5 24~27: 7.5 27~32: 6.5


dB

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5


dBm

<-30

<-30

<-30

<-30

<-30

<-30


dBm

<-30

<-30

<-30

<-30

<-30

<-30

Input return loss

dB

>40

>40

>40

>40

>40

>40

Output return loss

dB

>40

>40

>40

>40

>40

>40

Channel gain

dB

25

33

27

25

33

27


dB

>27

>27

>27

>27

>27

>27


dB

>27

>27

>27

>27

>27

>27

Gain flatness

dB

&1

&1

&1

&1

&1

&1


ms

<10

<10

<10

<10

<10

<10


ps

<0.5

<0.5

<0.5

<0.5

<0.5

<0.5

Item

Unit


5

EDFA+RAMAN amplifier performance parameters

The DRA board of ZXWM M920 adopts the EDFA+RAMAN technology to amplify optical signals. The main performance parameters are listed in Table 47 .

82




Table 47

6

Performance Parameters of EDFA+RAMAN Amplifier

Item

Unit

Specification


Nm

1529 ~ 1561 (C band) 1570 ~ 1605 (L band)


dBm

+ 20

Noise coefficient

dB

<3

Polarization-related gain

dB

< 0.5

Input reflectance

dB

>40

Output reflectance

dB

>40


dB

>30


dB

>30

Gain flatness

dB

± 1


Ms

< 10


Ps

< 0.5

RAMAN amplifier performance parameters are listed in Table 48 .

Table 48

Performance Parameters of RAMAN amplifier

Item

Unit

Type

Parameters Inverse distributed pump

Pump wavelength and quantity

nm/piece

C:2~3#L:2~3

Pump power

dBm

<29

Total output power

dBm

12

Type of output connector

SC/UPC! APC"

C, L and C+L gain (G652)

dB

10/10/10

C, L and C+L gain (LEAF)

dB

12/12/12

C, L and C+L gain (TW RS)

dB

13/13/13

C, L and C+L equivalent noise figure (G652)

dB

0/0/0

C, L and C+L equivalent noise figure (LEAF)

dB

-1/-1/-1

C, L and C+L equivalent noise figure (TW RS)

dB

-1.5/-1.5/-1.5

Associated polarization loss

dB

<0.5

Temperature feature

pm/°C

<500

Note: C band amplifier module pump wavelength: 1421.5/1455.0nm and 1425/1440/1456nm; L band amplifier module pump wavelength: 1439.0/1495.0nm;



83


7

RPOA amplifier performance parameters are listed in Table 49 .

Table 49

5.7

Performance Parameters of RPOA amplifier

Item

RPOA with GFF subsystem

RPOA without GFF subsystem


1529~1561nm

1546~1561nm

Noise coefficient

<7dB

<7dB

Gain

14820dB

10826dB

Gain flatness

<2dB!1872dB"

<2dB!16926dB"


-448-19dBm

-448-19dBm


-3081dBm

-3487dBm

Working temperature range

#-108 -20865*C !RGU" 60*C!RPU"

#-20865*C !RGU" 10860*C!RPU"

Storage temperature range

-40885*C

-40885*C

OTU Interface Indices Line codes of OTU tributary/line optical interfaces employ NRZ, which are respectively compliant with ITU-T G.707 and G.709. 1

The interface indices of 2.5 Gbit/s OTU at the transmitting end of ZXWM M920

The interface indices of 2.5 Gbit/s OTU at the transmitting end of ZXWM M920 are listed in Table 50 .

Table 50

The Interface Indices of 2.5 Gbit/s OTU at the Transmitting End of the ZXWM M920

Item

Unit

Parameter

S-point parameters at the OTU i nput end Type of Receiver

---

PIN

dBm

-18

Max. reflection of Receiver

dB

-27

Overload power

dBm

0

Input signals wavelength range

nm

1280~1565

-12

Receiving sensitivity (BER≤10

)

Sn point parameters at the OTU output end Type of nominal light source

Spectral characteristics

Central frequency

84

---

MQW-DFB

Max. (20dB spectral width

nm

0.2

Min. side mode suppression ratio

dB

35

Nominal central frequency

THz


191.3-196.05!C-band" 186.95-190.9!L-band"



Central frequency deviation

GHz

Max.

dBm

0

Min.

dBm

-10

Chirp modulus

---

0.15

Min. extinction ratio

dB

+10

Dispersion holding value

ps/nm

12800/3200

Eye pattern mask

---

In compliance with ITU-T Recommendation G.957

Mean transmission power

2

≤ ±20 ≤ ±5

(100 GHz spacing)

(50 GHz spacing)

The interface indices of 2.5 Gbit/s OTU for the regenerator of the transmitting end of ZXWM M920

The interface indices of 2.5 Gbit/s OTU for the regenerator of ZXWM M920 are l isted in Table 51 .

Table 51

The Interface Indices of 2.5 Gbit/s OTU for the Regenerator

Item

Unit

Parameter


---

APD

Receiving sensitivity (BER≤10 12 )

dBm

-25


dB

-27

Overload power

dBm

-9


nm

1280~1565



Central frequency

Mean transmission power Chirp modulus


---

MQW-DFB

Max. -20dB spectral width

nm

0.2


dB

35


THz


GHz

Max.

dBm

0

Min.

dBm

-10

---

0.15

191.3-196.05!C-band" 186.95-190.9!L-band" ≤ ±20 ≤ ±5

(100 GHz spacing)

(50 GHz spacing)


85


3

Item

Unit

Parameter


dB

+10


ps/nm

12800

Eye pattern mask

---


The interface indices of 2.5 Gbit/s OTU at the receiving end of ZXWM M920

The interface indices of 2.5 Gbit/s OTU at the receiving end of ZXWM M920 are listed in Table 52 .

Table 52

The Interface Indices of 2.5 Gbit/s OTU at the Receiving End of the ZXWM M920

Item

Unit

Parameter


---

APD

-12 Receiving sensitivity (BER≤10 )

dBm

-25


dB

-27

Overload power

dBm

-9


nm

1280 ~ 1565


---

DFB

Max.

dBm

+3

Min.

dBm

-2


dB

8.2

Output wavelength range

nm

1500~1580

Eye pattern mask

---



Note 1: Mean transmitting power includes two types: intra office interface. 4

long-haul optical interface and

The interface indices of 10 Gbit/s OTU at the transmitting end of ZXWM M920

The interface indices of 10 Gbit/s OTU at the transmitting end of ZXWM M920 are listed in Table 53 .

Table 53

The Interface Indices of 10 Gbit/s OTU at the Transmitting End of the ZXWM M920

Item

Unit

Parameter

S-point parameters at the OTU i nput end Type of Receiver Receiving sensitivity (BER≤10 12 )

86

--dBm

PIN/APD -14

PIN

-21

APD




Item

Unit

Parameter


dB

-27

Overload power

dBm


nm

0

PIN

-9

APD

1280 ~ 1625



---

MQW-DFB


nm

0.3


dB

35

Nominal central frequency Central frequency

THz

191.30~196.075!CE-band" 186.95~190.90!L-band" + ±12.5 (spacing: 100 GHz)


GHz

Max.

dBm

0

Min.

dBm

-5

Chirp modulus

---

0.3 ~ 0.7


dB

+10


ps/nm

800

Eye pattern mask

---



5

192.10~196.05!C-band"

+ ±5 (spacing: 50 GHz) + ±2.5G (spacing: 25 GHz)

The interface indices of 10 Gbit/s OTU for the regenerator of the transmitting end of ZXWM M920

The interface indices of 10 Gbit/s OTU for the regenerator of ZXWM M920 are li sted in Table 54 .

Table 54

The Interface Indices of 10 Gbit/s OTU for the Regenerator

Item

Unit

Parameter

S-point parameters at the OTU input end Type of Receiver

---

Receiving sensitivity (BER≤10 12 )

dBm


dB

Overload power

dBm


PIN/APD -14

PIN

-21

APD

-27 0

PIN

-9

APD


87


Item

Unit

Parameter


nm

1280~1625



MQW-DFB


nm

0.3


dB

35


Central frequency

192.10~196.05!C-band" THz

191.30~196.075!CE-band" 186.95~190.90!L-band" + ±12.5 (spacing: 100 GHz)


GHz

Max.

dBm

0

Min.

dBm

-5

Chirp modulus

---

0.3 ~ 0.7


dB

+10


ps/nm

800

Eye pattern mask

---



6

---


The interface indices of 10 Gbit/s OTU at the receiving end of ZXWM M920

The interface indices of 10 Gbit/s OTU at the receiving end of ZXWM M920 are li sted in Table 55 .

Table 55

The Interface Indices of 10 Gbit/s OTU at the Receiving End

Item

Unit

Parameter

S-point parameters at the OTU input end Type of Receiver

---

-12 Receiving sensitivity (BER≤10 )

dBm


dB

Overload power

dBm


nm

PIN/APD -14

PIN

-21

APD

-27 0

PIN

-9

APD

1280~1625

Sn point parameters at the OTU output end Type of nominal light source Mean

88

launched

Maximum

---

DFB

dBm

-1




optical power (longdistance optical interface S-64.2a)

Minimum

dBm

-5

Mean launched optical power (longdistance optical interface S-64.2b)

Maximum

dBm

+2

Minimum

dBm

-1

Mean launched optical power (shortdistance optical interface I-64.2r)

Maximum

dBm

-1

Minimum

dBm

-5

Mean launched optical power (shortdistance optical interface I-64.1)

Maximum

dBm

-1

Minimum

dBm

-6


dB

10

Eye pattern mask

---


Note 1: There are 2 options for the mean transmitting power, one is long-haul optical interface, while the other is the intra-office interface. 7

The interface indices of 40 Gbit/s OTU(DPSK) of ZXWM M920

at the transmitting end (80-channel)

The interface indices of 40 Gbit/s OTU(DPSK) at the transmitting end of ZXWM M920 are listed in Table 56 .

Table 56

The Interface Indices of 40 Gbit/s OTU(DPSK) at the Transmitting End of ZXWM M920

Item

Unit

Parameter

Modulation

-

DPSK

Bit rate

Gbps

43.018

Parameters of optical receiving port at client side (S point) Receiving sensitivity (BER≤1012)

dBm

-6

Overload power

dBm

+3

Reflection of Receiver

dB

-27


nm

1280 ~ 1565


ps/nm

-10~+60

Parameters of optical transmitting port at line side ( Sn point) Type of nominal light source Spectral Max. -3dB characteristics spectral width Min. side mode


---

MQW-DFB

GHz

45

dB

35


89


Item

Unit

Parameter

Modulation

-

DPSK

Bit rate

Gbps

43.018

suppression ratio

Central frequency


THz


GHz

±1.5

Channel spacing

GHz

50

Max.

dBm

+3

Min.

dBm

0

---

No standard with DPSK

Eye pattern mask 8

192.10~196.05!C-band"


191.30~196.075!CE-band"

The interface indices of 40 Gbit/s OTU(DPSK) for the regenerator of the transmitting end (80-channel) of ZXWM M920

The interface indices of 40 Gbit/s OTU(DPSK) for the regenerator of ZXWM M920 are listed in Table 57 .

Table 57

The Interface Indices of 40 Gbit/s OTU(DPSK) for the Regenerator

Item

Unit

Parameter

Modulation

-

DPSK

Bit rate

Gbps

43.018

S-point parameters at the OTU input end Receiving sensitivity (BER≤10 12 )

dBm

-18

Overload power

dBm

5


dB

>27


nm

1280~1565



Central frequency

90

---

MQW-DFB


nm

0.72


dB

35


THz

192.10~196.05




Item

Unit

Parameter

Modulation

-

DPSK

Bit rate

Gbps

43.018


GHz

±1.5

Max.

dBm

3

Min.

dBm

0


ps/nm

-100~+1000

Eye pattern mask

---

No standard with DPSK


9

The interface indices of 40 Gbit/s OTU(DPSK) at the receiving end (80-channel) of ZXWM M920

The interface indices of 40 Gbit/s OTU(DPSK) at the receiving end of ZXWM M920 are listed in Table 58 .

Table 58

The Interface Indices of 40 Gbit/s OTU(DPSK) at the Receiving End

Item

Unit

Parameter

Modulation

-

DPSK

Bit rate

Gbps

43.018

Parameters of optical receiving port at li ne side (Rn point) Receiving sensitivity (BER≤1012)

dBm

6 -18

Overload power

dBm

:+5


dB

>27


nm

1280 ~ 1565

Dispersion holding value (with TODC)

ps/nm

-100~+1000

Parameters of optical transmitting port at client side (R poi nt) Type of nominal light source

---

MQW-DFB


dB

35


dB

8.2

Output signals wavelength range

nm

1280 ~ 1565


Max.

dBm

+3

Min.

dBm

0

---

G.959. NRZ 40G

Eye pattern mask 10

The interface indices of 40 Gbit/s OUT !DQPSK" of ZXWM M920 are listed in following Table 59 .



91


Table 59 M920

The Interface Indices of 40 Gbit/s OUT (DQPSK) at the Transmitting End of ZXWM

Item

Unit

Parameter

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018

Parameters of optical receiving port at client side (S point) Receiving sensitivity (BER≤1012)

dBm

-6

Overload power

dBm

+3


dB

-27


nm

1280 ~ 1565


ps/nm

-10~+60

Parameters of optical transmitting port at line side ( Sn point) Type of nominal light source Spectral Max. -3dB characteristics spectral width

Central frequency


---

MQW-DFB

GHz

45


dB

35


THz


GHz

±1.5

Channel spacing

GHz

50

Max.

dBm

+1

Min.

dBm

-10

---

No standard with DQPSK

Eye pattern mask

Table 60

192.10~196.05!C-band" 191.30~196.075!CE-band"

The Interface Indices of 40 Gbit/s OUT(DQPSK) for the Regenerator

Item

Unit

Parameter

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018

Parameters of optical receiving port at li ne side

92

Receiving sensitivity (BER≤1012)

dBm

6 -18

Overload power

dBm

:+5




Item

Unit

Parameter

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018


dB

>27


nm

1280 ~ 1565


ps/nm

-700~+700

Parameters of optical transmitting port at line side Type of nominal light source


Central frequency


---

MQW-DFB


GHz

45


dB

35


THz


GHz

±1.5

Channel spacing

GHz

50

Max.

dBm

+1

Min.

dBm

-10

---


Eye pattern mask

Table 61

192.10~196.05!C-band" 191.30~196.075!CE-band"

The Interface Indices of 40 Gbit/s OTU (DQPSK) at the receiving End

Item

Unit

Parameter

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018

Parameters of optical receiving port at li ne side (Rn point) Receiving sensitivity (BER≤1012)

dBm

6 -18

Overload power

dBm

:+5


dB

>27


nm

1280 ~ 1565


ps/nm

-700~+700

Parameters of optical transmitting port at client side (R poi nt) Type of nominal light source

---

MQW-DFB


dB

35



93


Item

Unit

Parameter

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018


dB

8.2

Output signals wavelength range

nm

1280 ~ 1565


Max.

dBm

+3

Min.

dBm

0

---

G.959. NRZ 40G

Eye pattern mask 11

OTU jitter transfer characteristics

In ZXWM M920, the wavelength converter of the OTU has the same jitter transfer characteristics with that of SDH regenerative repeater, which is compliant with ITU-T G.825, G.958, and G.783 recommendation. 12

OTU input jitter tolerance

In ZXWM M920, the input jitter template that can be tolerated by the OTU input port is complaint with ITU-T G.825, G.958, and G.783 Recommendation.

5.8

Tributary overhead processing of convergence board Convergence board processes segment overhead bytes at each tributary in accordance with the following table. OTU2 signal at the li ne can supervise FEC error, uncorrectable error and SM-BIP8.

Table 62

Overhead byte at tributary segment

Processing mode

A1, A2

Frame localization bytes A1 and A2 at each tributary are regenerated to ensure proper frame encapsulation.

B1

B1 at each tributary are terminated.

B2

94

Tributary overhead processing of convergence board

If B2 at the line are not modified at multiplexing segment, bit error information of B2 will be transmitted transparently. Otherwise, the de-multiplexer will write the information into B2 at related tributary.

D1~D12

They ensure transparency of DCC channel at each tributary.

E1#E2

They ensure transparency of order wire channel at each tributary, that is, transparency of E1 and E2.

F1

It ensures transparency of F byte at each tributary.

J0

It can supervise J0 at each tributary and ensure transparent transmission.

K1#K2

After multiplexed and de-multiplexed by transparent sub-rate multiplexer, APS byte K1 and K2 at each tributary retain accuracy




of original state, transparent sub-rate multiplexer do not affect services protection at each tributary. When S1 at each tributary is terminated, new clock is calculated again and used. Line interface of transparent sub-rate multiplexer should support SSM function (processed as SDH equipment).

S1

5.9

Service Convergence parameters This section describes the specifications of convergence boards, including SRM41 SRM42MQT3GEM2GEMFGEM8DSADSAFDSAE and SMU.

Table 63

The parameters of SRM41

Item

Unit

Specification

Parameters of optical receiving port at li ne side (Rn point) Receiving sensitivity

dBm

Receiver reflection

dB

Overload power

dBm

Wavelength area of input signals

nm

-14 (PIN) -21 (APD) >27 0 (PIN) -9 (APD) 1250-1620

Parameters of optical transmitting port at line side (Sn point)


Maximum (20 dB bandwidth

nm

0.3

Minimum side mode compression ratio (SMCR)

dB

35


192.10~196.05!C-band" THz

186.95~190.90!L-band"

Central frequency Central frequency offset

191.30~196.075!CE-band"

GHz

+ ±12.5 (spacing: 100 GHz) + ±5 (spacing: 50 GHz) + ±2.5G (spacing: 25 GHz)

Mean launched power

dBm

-5 to 0

Minimum extinction ratio

dB

10

Dispersion tolerance

ps/nm

800

-

Compliance with ITU-T G.959.1

Eye diagram

Parameters of optical receiving port at cli ent side (S point) Receiving sensitivity

dBm

-18 (I-16) -18 (S-16) -27 (L-16.1) -28 (L-16.2)



95


Item

Unit

Specification -27 (L-16.3)

Receiver reflection

dB

>27 -3 (I-16)

Overload power

dBm

0 (S-16) -9 (L-16)


nm

1250-1620

Parameters of optical transmitting port at client side (R point) -10 to -3 (I-16) Mean launched power

dBm

-5 to 0 (S-16) -2 to +3 (L-16)

96


dB

8.2

Eye diagram

-

Compliant with ITU-T G.957




Table 64

Specification of SRM42 Board

Item

Unit

Specification


dBm

Receiver reflection

dB

Overload power

dBm


nm

-18 (PIN) -28 (APD) >27 0 (PIN) -9 (APD) 1250-1620




nm


dB

0.2 (EA) 0.4 (DM) 35 192.10~196.05!C-band"

Central frequency


THz

191.30~196.075!CEband" 186.95~190.90!L-band"

GHz

+ ±12.5 (spacing: 100 GHz) + ±5 (spacing: 50 GHz)

Mean launched power

dBm

-10 to 0


dB

10 (EA) 8.2 (DM)


ps/nm

12800 (EA) 3200 (DM)

Eye diagram

-

Compliance with ITU-T G.957

Central frequency offset

Parameters of optical receiving port at cli ent side (S point) -23 (I-4) -18 (S-4) Receiving sensitivity

dBm

-28 (L-4) -23 (I-1) -28 (S-1) -34 (L-1)

Receiver reflection

dB

>27 (S-4.2) >14 (L-4.1) >27 (L-4.2)



97


Item

Unit

Specification >14 (L-4.3) >25 (L-1.2) NA (others) -8 (I-4) -8 (S-4)

Overload power

dBm

-8 (L-4) -8 (I-1) -8 (S-1) -10 (L-1)


nm

1250-1620

Parameters of optical transmitting port at client side (R point) -15 to -8 (I-4) -15 to -8 (S-4) Mean launched power

dBm

-3 to +2 (L-4) -15 to -8 (I-1) -15 to -8 (S-1) -5 to 0 (L-1) 8.2 (I-4) 8.2 (S-4)


dB

10 (L-4) 8.2 (I-1) 8.2 (S-1) 10 (L-1)

Eye diagram

Table 65

The parameters of

-


MQT3(DPSK)

Item

Unit

Specification

Modulation

-

DPSK

Bit rate

Gbps

43.018


dBm

6-18

Receiver reflection

dB

>27

Overload power

dBm

:+5 192.10~196.05!C-band"


nm

191.30~196.075!CE-band" 186.95~190.90!L-band"

98




Item

Unit

Specification

Modulation

-

DPSK

Bit rate

Gbps

43.018



Central frequency


Ghz

90


dB

35 192.10~196.05!C-band"


THz


GHz

191.30~196.075!CE-band" 186.95~190.90!L-band" ±1.5

Mean launched power

dBm

+3 to +5

Dispersion tolerance (with TODC)

ps/nm

-100~+1000

-

Compliance with G.8251

Eye diagram

ITU-T

Parameters of optical receiving port at cli ent side (S point) -14 (I64.1) -16 (S64.2b) Receiving sensitivity

dBm

-14 (10GBASE-LR/LW" -16 (10GBASE-ER/EW" >14 (I64.1) >27 (S64.2b) >14 (10GBASE-LR/LW"

Receiver reflection

dB

>27 (10GBASE-ER/EW" 0 (I64.1)

Overload power

dBm

-1 (S64.2b) 0 (10GBASE-LR/LW" -1 (10GBASE-ER/EW"


nm

1280-1625

Parameters of optical transmitting port at client side (R point) -6~-1 (I64.1) Mean launched power

dBm

-1~2 (S64.2b) -6~-1 (10GBASE-LR/LW" -1~2 (10GBASE-ER/EW"


dB

6 (I64.1) 8.2 (S64.2b) 6 (10GBASE-LR/LW"



99


Item

Unit

Specification

Modulation

-

DPSK

Bit rate

Gbps

43.018 8.2 (10GBASE-ER/EW"

Eye diagram

-


Item

Unit

Specification

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018

Table 66

The parameters of

MQT3 !DQPSK"


dBm

6-18

Receiver reflection

dB

>27

Overload power

dBm

:+5


nm

192.10~196.05!C-band" 191.30~196.075!CE-band"



Central frequency


Ghz

45


dB

35


THz


GHz

192.10~196.05!C-band" 191.30~196.075!CE-band" ±1.5

Mean launched power

dBm

-10 to +1

Dispersion tolerance (with TODC)

ps/nm

-700~+700

Eye diagram

-


Parameters of optical receiving port at cli ent side (S point) -14 (I64.1) -16 (S64.2b) Receiving sensitivity

dBm

-14 (10GBASE-LR/LW" -16 (10GBASE-ER/EW" >14 (I64.1) >27 (S64.2b) >14 (10GBASE-LR/LW"

100

Receiver reflection

dB

>27 (10GBASE-ER/EW"

Overload power

dBm

0 (I64.1)




Item

Unit

Specification

Modulation

-

RZ-DQPSK

Bit rate

Gbps

43.018 -1 (S64.2b) 0 (10GBASE-LR/LW" -1 (10GBASE-ER/EW"


nm

1280-1565

Parameters of optical transmitting port at client side (R point) -6~-1 (I64.1) Mean launched power

dBm

-1~2 (S64.2b) -6~-1 (10GBASE-LR/LW" -1~2 (10GBASE-ER/EW" 6 (I64.1) 8.2 (S64.2b) 6 (10GBASE-LR/LW"


dB

8.2 (10GBASE-ER/EW"

Eye diagram

-


Table 67

Specification of GEM2/GEMF Board

Item

Unit

Specification


dBm

Receiver reflection

dB

Overload power

dBm


nm

-18 (PIN) -25 (APD) >27 0 (PIN) -9 (APD) 1250-1620




nm


dB

0.2 (EA) 0.4 (DM) 35 192.10~196.05!C-band"

Central frequency


191.30~196.075!CEband" 186.95~190.90!L-band"



THz

GHz



101


Item

Unit

Specification

Mean launched power

dBm

-10 to 0


dB

10 (EA) 8.2 (DM)


ps/nm

12800 (EA) 3200 (DM)

Eye diagram

-


Parameters of optical receiving port at cli ent side (S point) -17 (1000BASE-SX) Receiving sensitivity

dBm

-19 (1000BASE-LX) -20 (1000BASE-LH1) -22 (1000BASE-ZX) 0 (1000BASE-SX)

Overload power

dBm

-3 (1000BASE-LX) -3 (1000BASE-LH1) -3 (1000BASE-ZX)

Parameters of optical transmitting port at client side (R point) -9.5 to -3 (1000BASE-SX) Mean launched power

dBm

-11 to -3 (1000BASE-LX) -4 to 0 (1000BASE-LH1) -2 to +3 (1000BASE-ZX)

Table 68

Specification of GEM8 Board

Item

Unit

Specification

Parameters of optical receive port at line side (Rn point) Receiving sensitivity

dBm

Receiver reflection

dB

Overload power

dBm


nm

-14 (PIN) -21 (APD) >27 0 (PIN) -9 (APD) 1250-1620

Parameters of optical transmit port at line side (Sn point) Spectral characteristics


nm

0.3


dB

35 192.10~196.05!C-band"

Central frequency


THz

191.30~196.075!CEband" 186.95~190.90!L-band"

102




Item Central frequency offset

Unit

Specification

GHz

+ ±12.5 (spacing: 100 GHz) + ±5 (spacing: 50 GHz) + ±2.5G (spacing: 25 GHz)

Mean launched power

dBm

-5 to 0


dB

10


ps/nm

800

-

Compliance with ITU-T G.959.1

Eye diagram

Parameters of optical receive port at client side (S point) Receiving sensitivity

dBm

Overload power

dBm

-17 (1000BASE-SX) -19 (1000BASE-LX) 0 (1000BASE-SX) -3 (1000BASE-LX)

Parameters of optical transmit port at client side (R point) Mean launched power

Table 69

dBm

-9.5 to -3 (1000BASE-SX) -11 to -3 (1000BASE-LX)

Specification of DSA Board

Item

Unit

Specification


dBm

Receiver reflection

dB

Overload power

dBm


nm

-18 (PIN) -25 (APD) >27 0 (PIN) -2 (APD) 1250-1620

Parameters of optical transmit port at line side (Sn point)

Spectral characteristic


nm

0.2 (EA) 0.4 (DM)


dB

35 192.10~196.05!C-band"

Central frequency


191.30~196.075!CEband" 186.95~190.90!L-band"



THz

GHz



103


Item

Unit

Specification

Mean launched power

dBm

-10 to 0


dB

10 (EA) 8.2 (DM)


ps/nm

12800 (EA)/3200 (DM)

Eye diagram

-


Parameters of optical receive port at client side (S point) -17 (1000BASE-SX) -19 (1000BASE-LX) -20 (1000BASE-LH1) Receiving sensitivity

dBm

-22 (1000BASE-ZX) -25 (100-SM-LL-L) -20 (100-SM-LL-I) -13 (100-M5-SL-I) 0 (1000BASE-SX) -3 (1000BASE-LX) -3 (1000BASE-LH1)

Overload power

dBm

-3 (1000BASE-ZX) -3 (100-SM-LL-L) -3 (100-SM-LL-I) -1.3 (100-M5-SL-I)

Parameters of optical transmit port at client side (R point) -9.5 to -3 (1000BASE-SX) -11 to -3 (1000BASE-LX) -4 to 0 (1000BASE-LH1) Mean launched power

dBm

-2 to +3 (1000BASE-ZX) -9 to -3 (100-SM-LL-L) -12 to -3 (100-SM-LL-I) -7.3 to +1.3 (100-M5-SL-I)

Table 70

Specification of DSAF Board

Item

Unit

Specification


dBm

Receiver reflection

dB

Overload power

dBm

104


-21 (PIN) -25 (APD) >27 0 (PIN) -9 (APD)



Item

Unit

Specification


nm

1250-1620




nm


dB

0.2 (EA) 0.5 (DM) 30 192.10~196.05!C-band"

Central frequency


191.30~196.075!CEband"

THz

186.95~190.90!L-band" GHz


Mean launched power

dBm

-10 to 7


dB

10 (EA) 8.2 (DM)


ps/nm

12800 (EA) 6500 (DM)

Eye diagram

-



Parameters of optical receiving port at cli ent side (S point) -17 (1000BASE-SX) Receiving sensitivity

dBm

-19 (1000BASE-LX) -20 (1000BASE-LH1) -22 (1000BASE-ZX) 0 (1000BASE-SX)

Overload power

dBm

-3 (1000BASE-LX) -3 (1000BASE-LH1) -3 (1000BASE-ZX)

Parameters of optical transmitting port at client side (R point) -9.5 to -3 (1000BASE-SX) Mean launched power

dBm

-11 to -3 (1000BASE-LX) -4 to 0 (1000BASE-LH1) -2 to +3 (1000BASE-ZX)

Table 71

Specification of DSAE Board

Item

Unit

Specification

Parameters of optical receive port at client side (S point) Receiving sensitivity

dBm

-17 (1000BASE-SX) -19 (1000BASE-LX)



105


Item

Unit

Specification -20 (1000BASE-LH1) -22 (1000BASE-ZX) -25 (100-SM-LL-L) -20 (100-SM-LL-I) -13 (100-M5-SL-I) 0 (1000BASE-SX) -3 (1000BASE-LX) -3 (1000BASE-LH1)

Overload power

dBm

-3 (1000BASE-ZX) -3 (100-SM-LL-L) -3 (100-SM-LL-I) -1.3 (100-M5-SL-I)

Parameters of optical transmit port at client side (R point) -9.5 to -3 (1000BASE-SX) -11 to -3 (1000BASE-LX) -4 to 0 (1000BASE-LH1) Mean optical launched power

dBm

-2 to +3 (1000BASE-ZX) -9 to -3 (100-SM-LL-L) -12 to -3 (100-SM-LL-I) -7.3 to +1.3 (100-M5-SL-I)

Table 72

Specification of SMU Board

Item

Unit

Specification


dBm

Receiver reflection

dB

Overload power

dBm


nm

-14 (PIN) -21 (APD) >27 0 (PIN) -9 (APD) 1250-1620



Central

106


nm

0.3


dB

35

Nominal central

THz

192.10~196.05!C-band"




Item

Unit frequency

Specification 191.30~196.075!CE-band" 186.95~190.90!L-band"

frequency Central frequency offset

+ ±12.5 (spacing: 100 GHz)

GHz


Mean launched power

dBm

-5 to 0


dB

10


ps/nm

800

Eye diagram

-

Compliant with ITU-T G.959.1

Table 73

Specification of FCA

Board

Item

Unit

Specification

Parameters of optical receive port at line side (Rn) Receiving sensitivity

dBm

Receiver reflection

dB

Overload power

dBm


nm

-14 (PIN) -21 (APD) >27 0 (PIN) -9 (APD) 1280-1565


Spectral characteristic

Central frequency


nm

0.3


dB

35


THz

192.1-196.05


GHz


Mean launched power

dBm

-5 to 0


dB

10


ps/nm

800

Eye diagram

-


Parameters of optical receive port at client side Receiving sensitivity


FC

dBm

-18

2GFC

dBm

-18


107


Item

Overload power

Unit

Specification

4GFC

dBm

-18

FC

dBm

0

2GFC

dBm

0

4GFC

dBm

0

Parameters of optical transmit port at client side

Output power

5.10

FC

dBm

-4.5

2GFC

dBm

-4.5

4GFC

dBm

-4.5

OS Channel (SOSC) Performance Indices The SOSC interface performance indices of ZXWM M920 are listed in Table 74 .

Table 74

Main Performance Indices of SOSC

Item

Unit

Optical signal type Operating wavelength

5.11

Specification 100BASE-FX

nm

1510&10

Signal code

4B/5B

Supervision rate

100

Signal transmission power

dBm

-5 to 0

-1 to 6

,+4

Minimum receiving sensitivity

dBm

-34

-35

-43

Supervision interfaces indices In ZXWM M920 system, each DWDM TM, de-multiplexer and optical amplifier provide service supervision interface SC/PC to supervise active optical channel in real time without disconnecting services. Optical power difference between supervision interface and active optical channel can be found i n the following Table 75 .

Table 75

Functions and parameters of supervision interface at boards

Board

Division ratio at input supervision interface

Division ratio at output supervision interface

OMU

None

2.5%

ODU

2.5%

None

OCI

0.5%

2.5%

OBM

2.5%

0.5%

108




5.12

Board

Division ratio at input supervision interface

Division ratio at output supervision interface

OA

None

0.1% for 24dBm output OA, and 0.5% for others

Dispersion compensation parameters Dispersion compensation fiber is located before EOBA, EOPA and EOLA. When EOPA+EOBA mode is adopted, DCM is between them. Broadband dispersion compensation fiber is used to compensate optical channel dispersion, which is a negative v alue just like slope. Slope compensation rate is up to 90%~110%.

Table 76

Parameters of dispersion compensation equipment

Maximum insertion loss

Item

Maximum insertion loss & DGD G.652 fiber

Maximum insertion loss & DGD G.655 fiber

DGD(ps)

Unit

Parameter

20km

dB

2.5

<0.6

40km

dB

4

<0.8

60km

dB

6

<1.0

80km

dB

7

<1.1

100km

dB

8

<1.2

120km

dB

10

<1.2

20km

dB

2

<0.45

40km

dB

4

<0.60

60km

dB

5

<0.75

80km

dB

6

<0.80

100km

dB

7

<0.90

120km

dB

8

<1.0

5.13

Physical Performance

5.13.1

Structure Indices The dimensions and weight of ZXWM M920 are shown in Table 77 .

Table 77

Dimensions and Weight of ZXWM M920

Components Unified cabinets of ZTE transmission equipment


Dimensions

Weight (kg)

2,000 mm (H) % 600 mm (W) % 300 mm (D)

70

2,200 mm (H) % 600 mm (W) % 300 mm (D)

80

2,600 mm (H) % 600 mm (W) % 300 mm (D)

90


109


Components

Dimensions

Weight (kg)

sub-rack

422 mm (H) % 533mm (W) % 284.8 mm (D)

25

ODF sub-rack

88 mm (H) % 482.6 mm (W) % 269.5 mm (D)

--

DCM chassis

47 mm (H) % 533 mm (W) % 286.5 mm (D)

--

Power distribution sub-rack

3.6 mm (H) % 533 mm (W) % 233.1mm (D)

--

Telephone bracket

132.5 mm (H) % 482.6 mm (W) % 269.5 mm (D)

--

PCB

320 mm (W) % 210 mm (D)

--

Note:

5.13.2

The cabinet weight weight refers to the empty empty cabinet.

Bearing Requirements Requirements of the Equipment Room The bearing capability of the equipment room should be over 450 kg/m2 in case of only considering ZXWM M920.

5.13.3

Power Supply Indices 1

Voltage requirements

Input voltage: -48 VDC Allowable fluctuation range: -57 V ~ -40 V 2

Power consumption requirements

The power consumption of each board and unit in ZXWM M920 is illustrated in Table 78 .

Table 78

Power Consumption Consumption of of Commonly Commonly Used Used Boards/Units Boards/Units of ZXWM M920

Abbreviati on

Max. Power Consumption (W) @ 25 C Environment Temperature

2.5G optical transfer unit

OTU

14

2.5G optical transfer unit with FEC

OTUF

14

10G optical transfer unit with FEC/AFEC

OTU10G

29.2

Enhanced 10G optical transfer unit with FEC/FEC

EOTU10G

28

Semi 10G optical transfer unit with FEC/FEC

SOTU10G

25

40G optical transfer unit with FEC/AFEC

TST3

90

Four 10G SubRate Mux Board

MQT3

120

STM-64 sub-rate convergence

SRM41

33

Unit Name

Board

110


°



Abbreviati on


Four 622 M/155 M SubRate Mux Board

SRM42

20

Dual-channel gigabit Ethernet convergence board

GEM2

13

Dual-channel gigabit Ethernet convergence board with FEC

GEMF

18

Eight Gigabit Ethernet Mux Board

GEM8

35

OM board TFF/AWG

OMU

3!TFF" TFF"/13.2 ! AWG" AWG"

OD board TFF/AWG

ODU

3!TFF" TFF"/13.2 ! AWG" AWG"

Optical multiplex/demultiplex multiplex/demultiplex interleaver

OCI

3

Variable insertion inserti on loss Multiplexer Multi plexer

VMUX

30

Optical broadband multiplexer

OBM

3

Compact Optical Add/ Drop Board of 1/2/4 Wave length

SOAD1

4

SOAD2

4

SOAD4

5

Wavelength Blocking Unit

WBU

15

Wavelength Wavelength Selective Unit

WSU

15

Wavelength Blocking Multiplexing

WBM

32

EOBAS

14.5

EOBAH24 24

30

EOBAH27 26

40

Enhanced Optical preamplifier preamplif ier

EOPA

11

Enhanced Optical line amplifier

EOLA

14.5

Enhanced Optical node amplifier

EONA

25

Distributed Raman amplifier

DRA

35

Optical protection board

SOP

5

Optical performance monitoring board

OPM

5

Optical supervision channel board

SOSC

12

Net control processor

SNP

10

Transmitter supervisory add/drop multiplexer board

SDMT

3

Unit Name

°

board

Enhanced Optical power amplifier



111


Abbreviati on


Receiver supervisory add/drop multiplexer board

SDMR

3

Line attenuation control board (generator)

LACG

3

Line attenuation control board (terminal)

LACT

3

Extension Interface Board

SEI

5

Power Board (A-type)

SPWA

28

Compact Fan Board

SFAN

10

Master Sub-rack/ Slave Sub-rack

---

751

Unit Name

Sub-rack

°

Note: The power power values of of the sub-rack is for full configuration of of 10G OTU (SOTU 10G). The power consumption in the table is the m aximum value at normal temperature.

5.14

Environment Conditions

5.14.1

Grounding Requirements 1

Internal grounding requirements of the system

•

The board board shielding shielding plate is grounded grounded via the panel panel to the case, and and there is no electronic connection inside a board.

•

The cabinet and sub-rack case are connected to the protective ground.

2

The equipment room grounding requirements

•

Grounding resistance of the AC working ground: ≤ 4 Ω

•

Grounding resistance of the safety protection ground: ≤ 4 Ω

•

Grounding resistance of the lightning protection ground: ≤ 4 Ω

•

Combined grounding, with resistance ≤ 1 Ω

•

If the equipment room provides the working working ground and the protection protection ground, ground, the working and protection grounds of the equipment shall be connected to the relevant grounding copper bar. If the equipment room only provides a copper ground bar, it is

112




allowed to jointly earth the working and protection grounds. The resistance values shall meet the above requirements.

5.14.2

Temperature and Humidity Requirements The requirements on ambient temperature and relative humidity of ZXWM M920 are shown in Table 79 .

Table 79

Temperature and Humidity Requirements

Item

Indices

Ambient temperature

Relative humidity (35 °C)

Performance indices guaranteed

0 °C + 45 °C

Operation guaranteed

-5 °C ~ +55 °C

Performance indices granted

10% ~ 90%

Operation guaranteed

5% ~ 95%

In normal working environment, the measuring spot of humidity and temperature is the data measured at the spot 1.5 m above the floor and 0.4 m in front of the equipment.

5.14.3

Requirements Requirements for Cleanness Cleanness involves dust and harmful gases in the air. The equipment should be operated in the equipment room that m eets the cleanness requirements described below: 1

In the transmission equipment room, there is no explosive, electrically conductive, magnetically conductive or corrosive dust.

2

The concentration of dust particles with the diameter greater than 5-m should be less than or equal to 3 × 104 particles/m3.

3

There is no corrosive corrosive metal metal or gases gases that are are detrimental detrimental to the insulation in the equipment room. For details, please refer to Table 80 .

Table 80

4

Requirements for Harmful Harmful Gases in the Equipment Room 3

3

Harmful Gas

Mean Value (mg/m )

Max. Value (mg/m )

SO2

0.2

1.5

H2S

0.006

0.03

NO2

0.04

0.15

NH3

0.05

0.15

CL2

0.01

0.3

The equipment room should be always kept clean, with doors and windows windows being closed.



113


5.14.4

Dustproof and Corrosion-Proof Requirements According to the application range recommended in GB798, the dustproof and antisepsis requirements of ZXWM M920 are as f ollows:

5.14.5

1

Storage environment conditions: For 1K5/1Z1/1B2/1C2/1S3/1M3, the storage duration is 180 days.

2

Transportation environment conditions: For 2K4P/2B2/2C2/2S3/2M3, the transportation duration is 30 days.

3

Application environment conditions: For 3K5/3Z2/3Z7/3B2/3C2/3S2/3M3, the continuous operation time is 20 years.

Environment for Storage 1

Climate

Table 81

Climate requirement

Item

Range

Altitude

< 4000m

Air pressure

70 ~ 106kPa

Temperature

-404~ +704

Temperature change rate

< 14/min

Relative humidity

5% ~ 100%

Solar radiation

1120W/s.

Air speed

< 20m/s.

2

Mechanical stress

Table 82

Requirements for mechanical stress

Item

unit

value

Acceleration

m/S2

0.1

Frequency range

Hz

58100, 10085

direction

X,Y,Z

duration

Min

90

The earthquake-proof performance detection reaches the ei ght-level intensity

5.14.6

Environment for Transportation 1

114

Climate




Table 83

5.14.7

Climate requirement

Item

Range

Altitude

< 4000m

Air pressure

70 ~ 106kPa

Temperature

-404~ +704

Temperature change rate

< 1 4/min

Relative humidity

5% ~ 100%

Solar radiation

< 1120W/s.

Air speed

< 20m/s.

Electronic Static Discharge (ESD) 1

Anti-interference for static discharging

The static discharge anti-interference index of ZXWM M920 equipment is shown in Table 84 . During the operation in the interface area, be sure to wear an antistatic wrist strap.

Table 84

2

Static discharge anti-interference

Contact discharge

Air discharge

Criterion for test results

6kV

8kV

Performance B

8kV

15kV

Performance R

RF electromagnetic radiated susceptibility

The RF electromagnetic radiated susceptibility of ZXWM M920 equipment is shown in Table 85 .

Table 85

RF electromagnetic radiated susceptibility

Test frequency (80MHz~1000MHz)

3

Electric field intensity

Amplitude modulation


10V/m

80%AM (1kHz)

Performance A

Electrical fast transient burst susceptibility

The electrical fast transient burst susceptibility of ZXWM M920 equipment is shown in Table 86 and Table 87 .

Table 86

Electrical fast transient burst susceptibility at the DC power port

Generator waveform 5/50ns Test voltage 1kV


Repeated frequency


5kHz

Performance B


115


Table 87

Electrical fast transient burst susceptibilities at the signal cable and control cable ports

Generator waveform 5/50ns Test voltage 1kV 4

Repeated frequency


5kHz

Performance B

Surge susceptibility

The surge susceptibility of ZXWM M920 equipment is shown in Table 88 and Table 89 .

Table 88

Surge susceptibility of DC power

The waveform of generators 1.2/50us (8/20 s), internal resistance 12 Test mode

Test voltage


Line to ground

1kV

Performance B

Line to ground

2kV

Performance R

Table 89

Surge susceptibility of the outdoor signal cable

The waveform of generators 10/700!s, internal resistance 40 Test mode

Test voltage

Line to line Line to ground Line to line Line to ground

Table 90


2kV

Performance B

4kV

Performance R

Surge susceptibility of the indoor signal cable

Generator waveform 1.2/50 s (8/20s), internal resistance 42 Test mode

Test voltage


Line to ground

1kV

Performance B

Line to ground

2kV

Performance R

5

Conductivity susceptibility of RF field

The conductivity susceptibility of RF fi eld of ZXWM M920 equipment is shown in Table 91 .

Table 91

Conductivity susceptibility of RF field

Test frequency 0.15MHz ~ 80MHz Test intensity

Amplitude modulation


3V

80%AM (1kHz)

Performance A

Electromagnetic Interference (EMI)

6

116

Conductive emission electromagnetic interference




The conductive emission electromagnetic interference of ZXWM M920 equipment is shown in Table 92 .

Table 92

Conductive emission electromagnetic interference at the direct current port

Limits (dBuV)

Testing frequency (MHz)

7

Quasi-peak

Mean value

0.02~0.15

79

--

0.15~0.5

79

66

0.5~30

73

60

Radioactive emission electromagnetic interference

The radioactive emission electromagnetic interference of the ZXWM M920 equipment is shown in Table 93 .

Table 93

Radio active emission electromagnetic interference

Testing frequency (MHz)

5.14.8

Quasi-peak demodulating limit (dB !V/m) 10m

3m

30~230

40

50

230~1000

47

57

Safety requirements This product adopts the technical requirements specified in the following standard: IEC/EN 60950:2000 Safety of information technology equipment 1

Working voltage and current

Rated working voltage: -48V Max. working voltage: -57V Min. working voltage: -40V Rated working current: 16A 2

Insulation classification of the equipment

The power supply of the equipment provides the SELV circuit with safe and excessively low voltage, without self-generating dangerous voltage. It belongs to the equipment of the class III insulation (Class III equipment). 3

Optical interface

The optical module of the maximum power belongs to (Class 3A). All the optical modules shall be under strict control and c ertified by authorities (such as UL, TUV and NEMKO), and comply with EN60825.



117


4

Fuse

All the fuses and power modules, including recoverable fuses, shall be certified by authorities such as CE, UL and TUV. 5

Safety mark

On the package of the equipment, there are striking labels about antistatic, fragile, waterproof, and damp-proof. The maximum optical power satisfies the 3A safety standard. An obvious label warning against the laser shall be pasted at the optical interface. Cables of different colors shall be used f or the power input, shielding GND and lightening protection GND to avoid incorrect connection. Different power connectors shall use coding keys. There shall be a power label at the power inlet. Both the equipment and each board shall have an antistatic label. Grounding symbol 6

.$

$ indicates switch-on, and $

$ indicates switch-off.

Mechanical structure

In installation, four bolts are designed at t he rack bottom (may also be used to adjust balance) to fix the rack to the ground. At the rack top, the corresponding screws are designed to fix the rack to the cabling rack. When installed in the equipment room, the rack shall be fixed both at the top and bottom to ensure the stability and safety of the equipment. The corners of both the rack and sub-rack are processed to avoid hurting people. 7

Fire protection

The materials of the circuit boards in the equipment use the fireproof materials of the V-2 level to prevent the circuits from burning in case of failure. The structural parts use unburnable materials with a good fir eproof performance, including surface processing materials. With the effective heat dissipation design, it ensures that the temperature does not exceed 70/C to prevent heat aggregation and reduce the possibility of burning. Safe parts passing the safety authentication (CE, UL, etc.) are used. 8

High temperature protection

In abnormal conditions, the temperature does not exceed 70/C. The plastic parts, components, wires and cables, and safety labels shall all comply with the requirements specified in the safety standard-GB4943/EN60950. 9

Lightening protection

In this system, good grounding and isolation and protection of electrical interfaces are used to prevent the dangerous voltage of lightening.

118




5.15

Introduction to Interfaces This chapter briefly introduces types and functions of the interfaces used in ZXWM M920.

5.15.1

Interface on SEIA board SEIA has two subclasses: SEIA1 and SEIA2, the former used in main sub-rack, the l atter used in slave sub-rack Figure 39 Common Interface Area of the OTU Sub-rack



119


1

FE Ethernet interface

2

Testing switch

3

Subrack cascaded data interface

4

Bell control

5

External alarm input interface

6

Subrack indicators

7

Interface of cascaded alarm

8

Interface of alarm output, ring output and rack indicators signal

The definitions and descriptions of the interface area on SEI board are li sted in Table 94 and Table 95 .

Table 94

Definitions and Description for the Common Interface on SEIA1 Board

Item Board ID

120

SEIA1 SEIA1




Board Item

SEIA1

J4

RJ45 socket is used as Qx interface to access EMS computer, and also as the transparent user channel interface or IP phone interface based on Ethernet.


J1, J3

D-type 36pin straight PCB jointing socket (female) to connect to subrack cascaded data interface of other subarcks.

External alarm input interface

J2

Inputs external alarms.

Interface of cascaded alarm

J5

Inputs alarms from other subrack

Interface of alarm output, ring output and rack indicators signal

J6

Outputs alarm signal, ring driving signal and rack indicator signal

Testing switch

TST

Reserved


Bell control

Control the ON state or OFF state of the ring.

Subrack indicators

Indicates the state of the subrack, green light for normal state, red light for critical al arm, orange for major alarm, yellow for minor alarm

Number of occupied slot

1

Slot for SEIA1 board

Slot 29

Table 95

Definitions and Description for the Common Interface on SEIA2 Board

Item

SEIA2

Board ID

SEIA2


J3

RJ45 socket is used as Qx interface to access EMS computer, and also as the transparent user channel interface or IP phone interface based on Ethernet.

J1, J2

D-type 36pin straight PCB jointing socket (female) to connect to subrack cascaded data interface of other subarcks.




121


Board Item

Testing switch

5.15.2

TST

SEIA2

Reserved


1

Slot for SEIA2 board

Slot 29

Interface on SPWA board Figure 40 Interfaces on the SPWA board

1

Terminal block

2

Subrack cascaded GE interface

3

Subrack cascaded GE optical interface connection indicator

4

Power switch

5

RS232 console interface

122




6

RJ-45 console interface

7

Indicators

8

Laser warning sign

9

Laser level sign

The definitions and descriptions of the interface area on SPWA board are listed i n Table 96 .

Table 96

Definitions and Description for the Common Interface on SPWA Board

Item

SPWA

Board ID

SPWA

Power switch

If the switch is in the status of #ON", the external power supply is connected to the SPWA. On the other hand, if the switch i s in the status of "OFF$, the connection between SPWA and the external power is cut off.

Indicator

Subrack cascaded GE interface

NOM

Running indicator, green

ALM

Alarm indicator, red

M/S

Master/slave indicator, green

0, 1, 2, 3-1, 3-2, 3-3, 3-4, 4, 5-1, 5-2, 5-3, 5-4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20-1, 20-2, 21, 22-1, 22-2, 23, 24-1, 24-2, 25, 26-1, 26-2

Board internal communication indicator, green.

J1, J2

Connects to subrack cascaded GE interface of other subracks, LC/PC connector

Laser warning sign

Do not look at optical interfaces directly while plugging/unplugging fiber pigtails to avoid burning eyes.

Laser class sign

Indicates that the laser class of SPWA board is CLASS 1


1

Slot for SPWA board

Slot 27, slot 28



123

WM M920 Product Description

6

Appendix A Abbreviation Abbreviation

Full English Description

AFEC

Advance Forward Error Correction

AFR

Absolute Frequency Reference

AIS

Alarm Indication Signal

APR

Automatic Power Reduction

APS

Automatic Protection Switching

APSD

Automatic Power Shutdown

APSF

Automatic Protection Switching for FastEthernet

ASE

Amplified Spontaneous Emission

AWG

Array Waveguide Grating

BER

Bit Error Ratio

BLSR

Bidirectional Line Switching Ring

BSHR

Bidirectional Self-Healing Ring

CDR

Clock and Data Recovery

CMI

Code Mark Inversion

CODEC

Code and Decode

CPU

Center Process Unit

CRC

Cyclic Redundancy Check

DBMS

Database Management System

DCC

Data Communications Channel

DCF

Dispersion Compensation Fiber

DCG

Dispersion Compensation Grating

DCN

Data Communications Network

DCM

Dispersion Compensation Module

DDI

Double DAFECt Indication

DFB-LD

Distributed Feedback Laser Diode

DSF

Dispersion Shifted Fiber

DGD

Differential Group Delay

DTMF

Dual Tone Multi Frequency

DWDM

Dense Wavelength Division Multiplexing

DXC

Digital Cross-connect

EAM

Electrical Absorption Modulation

ECC

Embedded Control Channel

EDFA

Erbium Doped Fiber Amplifier

EX

Extinction Ratio

FDI

Forward DAFECtion Indication

FEC

Forward Error Correction

124




Abbreviation


FPDC

Fiber Passive Dispersion Compensator

FWM

Four Wave Mixing

GbE

Gigabits Ethernet

GUI

Graphical User Interfaces

IP

Internet Protocol

LD

Laser Diode

LOF

Loss of Frame

LOS

Loss of Signal

MDI

Multiple Document Interface

MCU

Management and Control Unit

MOADM

Metro Optical Add Drop Multiplexer Equipment

MBOTU

Sub-rack backplane for OUT

MQW

Multiple Quantum Well

MSP

Multiplex Section Protection

MST

Multiplex Section Termination

SNP

Net Control Processor for Fast Ethernet

NE

Network Element

NNI

Network Node Interface

NMCC

Network Manage Control Center

NRZ

Non Return to Zero

NT

Network Termination

NZDSF

Non-Zero Dispersion Shifted Fiber

OA

Optical Amplifier

OADM

Optical Add/Drop Multiplexer

EOBA

Enhanced Optical Booster Amplifier

Och

Optical Channel

ODF

Optical fiber Distribution Frame

ODU

Optical Demultiplexer Unit

OGMD

Optical Group Mux/DeMux Board

OHP

Order wire

EOLA

Optical Line Amplifier

OLT

Optical Line Termination

OMU

Optical Multiplexer Unit

ONU

Optical Network Unit

OP

Optical Protection Unit

EOPA

Enhanced Optical Preamplifier Amplifier

OPM

Optical Performance Monitor

OPMSN

Optical Protect for Mux Section (without preventing resonance switch)



125

WM M920 Product Description

Abbreviation


OPMSS

Optical Protect for Mux Section (with preventing resonance switch)

SOSC

Optical Supervisory Channel

OSNR

Optical Signal-Noise Ratio

OTM

Optical Terminal

OTN

Optical Transport Network

OTU

Optical Transponder Unit

OXC

Optical Cross-connect

PDC

Passive Dispersion Compensator

PMD

Polarization Mode Dispersion

ROADM

Reconfigurable Optical Add/Drop Multiplexer

SDH

Synchronous Digital Hierarchy

SDM

Supervision add/drop multiplexing board

SEF

Severely Errored Frame

SES

Severely Errored Block Second

SFP

Small Form Factor Pluggable

SLIC

Subscriber Line Interface Circuit

SMCC

Sub-network Management Control Center

SMT

Surface Mount

SNMP

Simple Network Management Protocol

STM

Synchronous Transfer Mode

TCP

Transmission Control Protocol

TFF

Thin Film Filter

TMN

Telecommunications Management Network

WDM

Wavelength Division Multiplexing

126




7

Appendix B Followed Standards and Recommendations The ZXWM M920 is designed with reference to the f ollowing recommendations and standards: ITU-T G.652

Characteristics of a single-mode optical fiber and optical cable

ITU-T G.653

Characteristics of Dispersion-Shifted Single-Mode Fiber

ITU-T G.655 Fibers

Characteristics of Non-Zero Dispersion-Shifted Single-Mode

ITU-T G.661 Definition and test methods for the relevant generic parameters of optical amplifier devices and subsystems ITU-T G.662 subsystems

Generic characteristics of optical fiber amplifier devices and

ITU-T G.663 subsystems

Application related aspects of optical amplifier devices and

ITU-T G.664 transport systems

Optical safety procedures and requirements for optical

ITU-T G.671

Transmission characteristics of passive optical components

ITU-T G.681 Functional characteristics of interoffice and long-haul line systems using optical amplifiers, including optical multiplexing ITU-T G.691 Optical interfaces for single channel STM-64, STM-256 systems and other SDH systems with optical amplifiers ITU-T G.692 amplifiers ITUT-T G.694.1 ITU-T G.709-2003

Optical interface for multichannel systems with optical

Spectral grids for WDM application: DWDM frequency grid Optical Transport Network (OTN) Interfaces

ITU-T G.828 Optical input jitter and wander control based on the synchronous digital hierarchy (SDH) ITU-T G.826 Error performance parameters and indexes for international, constant bit rate digital paths at or above the prim ary group ITU-T G.841 architectures

Types and characteristics of SDH network protection

ITU-T G.957

Optical interfaces for SDH equipment and systems



127

ZXWM M920 Product Description

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