OptiX OSN 9500 Intelligent Optical Switching System

®

HUAWEI

OptiX OSN 9500 Intelligent Optical Switching System System Description V100R001

OptiX OSN 9500 Intelligent Optical Switching System System Description

Manual Version

T1-040000-20021125-C-1.00

Product Version

V100R001

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office, customer care center or company headquarters.

Huawei Technologies Co., Ltd. Address: Huawei Huawei Customer Service Building, Kefa Kefa Road, Science-based Science-based Industrial Park, Shenzhen, Shenzhen, P. R. China Postal Code: 518057 Website: http://www.huawei.com Email: [email protected] [email protected]


Manual Version

T1-040000-20021125-C-1.00

Product Version

V100R001

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office, customer care center or company headquarters.

Huawei Technologies Co., Ltd. Address: Huawei Huawei Customer Service Building, Kefa Kefa Road, Science-based Science-based Industrial Park, Shenzhen, Shenzhen, P. R. China Postal Code: 518057 Website: http://www.huawei.com Email: [email protected] [email protected]

© 2002 Huawei Technologies Technologies Co., Ltd.

All Rights Reserved No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks

®

®

, HUAWEI , C&C08, EAST8000, EAST8000, HONET,

, ViewPoint, INtess, ETS, DMC,

TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium,

M900/M1800,

TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN, HUAWEIOptiX, C&C08 iNET, NETENGINE, OptiX, SoftX, iSite, U-SYS, iMUSE, OpenEye, Lansway, SmartAX are trademarks of Huawei Technologies Co., Ltd.

Notice The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document don't constitute the warranty of any kind, express or implied.


About This Manual

1 Introduction This System Description provides a brief description of the features, applications, structure and technical specifications of the OptiX OSN 9500 Intelligent Optical Switching System (OptiX OSN 9500 in short).The document is arranged as follows: 

Introduction

Outlines the requirement of backbone network and Metropolitan Area Network (MAN) over the transmission network; discusses the corresponding Huawei solutions, together with the application of the OptiX OSN 9500 on the transmission network. 

Product Features

Lists the Huawei OptiX series optical transmission products and highlights a few outstanding features of the OptiX OSN 9500. 

Networking Application

Describes the networking application of the OptiX OSN 9500 from a view of network planning. The typical intelligence-related application is focused on. 

System Structure

Introduces the structure of the OptiX OSN 9500 by functional modules, followed by a layered introduction to the hardware and software structures. 

Reliability Design

Deals with the equipment and network-level protection mechanisms of the OptiX


Error! Style not defined. OSN 9500. 

Operation, Administration & Maintenance

Describes the OptiX OSN 9500 in terms of Operation, Administration & Maintenance (OAM). 

Technical Specifications

Collects all the OptiX OSN 9500 related technical parameters and specifications. 

Acronyms

Lists all the acronyms used in the manual, together with their meanings for comprehension purpose.

2 Target Readers This document is designed for any one who needs a general command of the features, applications, structure and technical specifications of the OptiX OSN 9500.


Error! Style not defined.

3 Conventions Used The symbols below are used in the manual:

Symbol

Meaning Symbol for general precautionary message, reader should take note during operation.

Symbol for possible static damage to the equipment, reader should be careful.

Symbol for electrical hazard, reader should be careful

Symbol for strong laser beam, reader should be careful.



Symbol for prompt information, reader may make reference. Symbol for the OptiX OSN 9500.

Symbol for Add/Drop Multiplexer (ADM).

Symbol for Terminal Multiplexer (TM).

Symbol for case-shaped Add/Drop Multiplexer (ADM). Symbol for router equipment.

Symbol for switch equipment.


Contents

1

2

Introduction 1 Service and Market Demands

1

2 Overview of Network Application

2

Product Features 1 OptiX Series Optical Transmission Products

4

2 Functions and Enhancements

7

2.1 Application of the OptiX OSN 9500 2.2

3

Large

Capacity

and

Multi-granularity

7 Optical

Switching Capability

7

2.3 Flexible Optical Switching Applications

7

2.4 Abundant Service Types

8

2.5 Higher Integration Design

8

2.6 Easy Upgrade and Expansion

8

2.7 Flexible Networking

8

2.8 Diverse Protection Mechanisms

8

2.9 Powerful ECC Processing

9

2.10 Excellent Network Management Functionality

9

2.11 Power Supply and Environment Monitoring

9

2.12 Perfect SSM Management

10

2.13 Tandem Connection Monitoring (TCM)

10

Networking Application 1 Basic Network Topologies Supported by the OptiX OSN 9500

11

1.1 Chain Network

12

1.2 Ring Network

13

1.3 Mesh Network

13

i


Contents

1.4 Complex Network 2 Application in Networking

14 16

2.1 Application of Intelligent Feature

16

2.2 Application of the Switching Functionality

19

2.3 Combined Application with the OptiX 10G and the OptiX 2.5G

4

System Structure 1 Functional Modules

21

2 Hardware Structure

27

2.1 Cabinet

27

2.2 Subrack

27

2.3 Circuit Board

29

3 Software Structure

5

20

33

3.1 Board Software

35

3.2 NE Software

36

3.3 NM System

36

Reliability Design 1 Equipment Protection

38

1.1 Hot-standby 1+1 Redundancy for Key Functional Modules

38

1.2 Protection in Abnormal Conditions

39

1.3 Software Fault-Tolerance

40

1.4 Data Security

41

2 Network Protection

ii

42

2.1 Linear MS Protection

42

2.2 Ring Network Protection

42

2.3 Protection of Inter-ring Interconnection Traffic

48

2.4 Sub-Network Connection Protection (SNCP)

50


Contents

6

7

2.5 Shared-fiber Virtual Path Protection

50

2.6 Mesh Network Protection

51

Operation, Administration & Maintenance 1 Operation and Maintenance

55

2 OptiX iManager NM System

57

Technical Specifications 1 System Features

A

58

1.1 Applications

58

1.2 Intelligent Features

58

1.3 Service Switching Capability

58

1.4 Multiplexing and Mapping Structure

59

1.5 Interface Type

60

1.6 Mechnical Structure

62

1.7 Power Supply and Power Consumption

62

1.8 Environmental Conditions

63

2 Main Indexes of the OptiX OSN 9500

64

2.1 Optical Interface Specifications

64

2.2 Timing and Synchronization

75

2.3 Jitter Performance

75

2.4 Electromagnetic Compatibility (EMC)

77

Acronyms

iii


List of Figures

Figure 1 Networking application of the OptiX OSN 9500

3

Figure 2 Network configurations of the OptiX OSN 9500

12

Figure 3 Chain network

13

Figure 4 Ring network

13

Figure 5 Mesh network

14

Figure 6 Subtending rings

15

Figure 7 Intelligence features in application

17

Figure 8 Traffic engineering technique in application

18

Figure 9 OVPN in application

19

Figure 10 Multi-service switching functionality in application

19

Figure 11 Combined application with the OptiX 10G and the OptiX 2.5G

20

Figure 12 Functional structure of the OptiX OSN 9500 system

22

Figure 13 The OptiX OSN 9500 subrack

28

Figure 14 Front view of the OptiX OSN 9500 subrack

29

Figure 15 Back view of the OptiX OSN 9500 subrack

30

Figure 16 Software structure of the OptiX OSN 9500

33

Figure 17 Module based software structures of OSP

34

Figure 18 Relation between the control panel and the data panel

35

Figure 19 1+1 protection

39

Figure 20 Two-fiber bi-directional MS shared protection rings

43

Figure 21 Two-fiber unidirectional MS dedicated protection rings

45

Figure 22 Four-fiber MS shared protection rings

47

Figure 23 Interconnection service protection between MS

iv

shared protection rings

49

Figure 24 Subnetwork connection protection

50

Figure 25 Shared fiber virtual trail protection

51


51

Figure 27 Mesh network protection: non-intersecting recovery

52


List of Figures

Figure 28 Mesh network protection: failure route dependent recovery

53

Figure 29 Mesh network protection: local processing recovery

54

Figure 30 Multiplexing and mapping structure

60

v


List of Tables

Table 1 OptiX series optical transmission products Table 2 Differential protection for different service levels

5 16

Table 3 System units and the boards included and their functionality

25

Table 4 List of the circuit board

31

Table 5 Cross-connect and access capabilities of the OptiX OSN 9500

59

Table 6 Interface Type

60

Table 7 Optical interface types of the OptiX OSN 9500

61

Table 8 Clock characteristics of the OptiX OSN 9500

61

Table 9 Auxiliary Interfaces provided by the OptiX OSN 9500

61

Table 10 Mechanical structural components of the OptiX OSN 9500

62

Table 11 Maximum power consumption of circuit boards

62

Table 12 Environmental Conditions

63

Table 13 Application codes of optical interfaces

64

Table 14 Parameters specified for STM-1 optical interfaces

65


66

Table 16 Parameters specified for STM-16 optical interfaces (1)

67


vi

(2)

68


69

Table 19 Mean launched power

71

Table 20 Extinction ratio (EX)

71

Table 21 Receiver sensitivity

72

Table 22 Receiver overload

73

Table 23 Permissible frequency deviation at input

74

Table 24 Optical Output Interface AIS Rate Tolerance

74

Table 25 Output Jitter

75

Table 26 Clock output frequency

75

Table 27 STM-N jitter generation

76


List of Tables

Table 28 Jitter tolerance at STM-N interfaces

76

Table 29 Measuring filter

77

Table 30 EMC-related standards

77

vii


Introduction

1 Service and Market Demands With the ever growing of transmission network, network expansions are conducted worldwide. However, the problem of service grooming is becoming more and more concerned as well. The telecom operators are now facing the challenge to plan and manage more complex network and achieve the efficient application of the network. The OptiX OSN 9500, a newly developed bandwidth switching platform by Huawei Technologies, enjoys intelligent feature and works with different levels of granularity. It can be used on metropolitan backbone network and long-haul backbone network for the grooming of services. It helps to build a network with dynamic bandwidth allocation and thus forms an independent, operable management network for dynamic bandwidth environment, which solve the problem of grooming of large-capacity traffic flows and streamline the network management. The effect using the OptiX OSN 9500 is great, or even revolutionary on the networking scheme, network layer architecture and network equipment development.

1



2 Overview of Network Application The OptiX OSN 9500 features large switching capacity, flexible service access, high bandwidth availability and network reliability. As the intelligent optical switching platform, it adopts the optical core switch technology and provides switching capacity up to 720G. It deploys a variety of network configurations, including chain, ring and mesh networks, etc., and provides flexible VC-4, VC-3 and VC-12 levels of granularity for efficient bandwidth management. Besides, the OptiX OSN 9500 supports the following intelligent features: auto-configuration of end-to-end service; Service Level Agreement (SLA) and traffic engineering control; mesh network configuration and service protection; Optical Virtual Private Network (OVPN) service. The multi-service access capability and large cross-connect capacity of the OptiX OSN 9500 make it suitable for different network applications. This release can support the access of STM-1 (O), STM-1 (E), STM-4, STM-16, STM-64, GE, VC-4-4c, VC-4-8c, VC-4-16c and VC-4-64c services. This release can cross-connect VC-4 services and the next release will cross-connect VC-3 and VC-12 services as well. The OptiX OSN 9500 can be used to build networks either independently or jointly with Huawei-developed DWDM, SDH and Metro equipments. It can also be combined with other ITU-T compliant, the third-party equipments in network configuration. Figure 1 shows the typical applications of the OptiX OSN 9500 in networking.

2



Figure 1 Networking application of the OptiX OSN 9500

Note: The next release of the OptiX OSN 9500 will support: 

Lower order cross-connect function

3


Product Features

Huawei Technologies has been taking an active part for years in the events of various international standardization organizations and technical forums, keeping close track of the latest development of ITU-T Recommendations and intelligent optical network related standards. Huawei Technologies now has memberships in standardization organizations such as OIF, ITU-T, IETF. All the Huawei-developed products comply with the related recommendations and standards.

1 OptiX

Series

Optical

Transmission Products The new-generation Huawei OptiX series products include ION series, SDH series, Metro series, DWDM series and iManager series, which provide a complete optical network solution.

4



The OptiX OSN 9500, one of Huawei ION series products, is the bandwidth optical switching system which adopts the OCS design concept and enjoys intelligent feature.



The SDH series optical transmission products adopt the MADM design concept and support STM-1, STM-4, STM-16 and STM-64 speeds.



The DWDM series products provide dense wavelength division multiplexing (DWDM) equipments for backbone networks. The DWDM equipments include OptiX BWS 1600G and OptiX BWS 320G.



The Metro series products provide MSTP optical transmission systems for metropolitan networks. POS, ATM, IP technologies are widely applied in



developing these products. 

The iManager series products provide complete, integrated network management solution for telecom operators. The solution meets the demands of network management at different layers and applies to a variety of transmission network levels.

Table 1 lists OptiX series optical transmission products Table 1 OptiX series optical transmission products

Application category

Product series

Abbreviated equipment name

Equipment name

ION series

OptiX OSN 9500

OptiX OSN 9500 Intelligent Optical Switching System

OptiX BWS 1600G

OptiX BWS 1600G Transmission System

OptiX BWS 320G

OptiX BWS 320G Backbone DWDM Optical Transmission System

OptiX 10G

OptiX 10G STM-64 MADM Optical Transmission System

OptiX 2500+(metro3000)

OptiX 2500+(metro3000) Multi-service Optical Transmission System

OptiX 155/622(Metro2050)

OptiX 155/622(Metro2050) Transmission System

OptiX 155/622H(Metro1000)

OptiX 155/622H(Metro1000) STM-1/STM-4 MSTP Optical Transmission System

OptiX Metro 6100

OptiX Metro 6100 16/32-Channel DWDM Multi-service Transmission Platform

OptiX Metro 6040

OptiX Metro 6040 Compact Container DWDM System

OptiX Metro 3100

OptiX Metro 3100 STM-16 Multi-service Transmission Platform

OptiX Metro 1100

OptiX Metro 1100 Compact Transmission System

OptiX Metro 1050

OptiX Metro 1050 Compact STM-1/STM-4 Multi-Service Optical Transmission System

OptiX Metro 500

OptiX Metro 500 Ultra Compact STM-1 Multi-service Transmission System

DWDM series

SDH series

Network Element (NE) equipment

Metro series

Backbone

DWDM

STM-1/STM-4

STM-16

Optical

Optical

Multi-service

5



Application category

Network Management (NM) system

6

Product series

iManager series

Abbreviated equipment name

Equipment name

OptiX T2000

iManager

HUAWEI Integration Network Management System for Transmission Network (Sub-Network Level)

OptiX T2100

iManager

OptiX iManager T2100 Integrated Network System for Transmission Network

OptiX iManager ONS

OptiX iManager Optical Network Service Integrated Management System



2 Functions and Enhancements 2.1 Application of the OptiX OSN 9500 The OptiX OSN 9500 provides a set of stand-alone intelligent software system which is quite convenient and flexible in use in dynamic bandwidth allocation, intelligent route finding and configuration of services. The bandwidth availability using the OptiX OSN 9500 is much improved. The OptiX OSN 9500 allows the following functions: 

Auto-configure end-to-end service.



Support Service Level Agreement (SLA).



Provide traffic engineering control to automatically load balance traffic networkwide and improve the bandwidth availability.



Provide distributed mesh network protections in fast re-route and pre-configure schemes; support span protection and end-to-end service protection, improving the scalability of the network.



Support optical virtual private network (OVPN) service.

2.2 Large Capacity and Multi-granularity Optical Switching Capability The OptiX OSN 9500 provides the switching matrix with the capacity up to 2560×2560 or 4608×4608 VC-4s, capable of higher order non-blocking cross-connect at VC-4 level. It can also provide the switching matrix with the 20G or 40G cross-connect capacity, realizing lower order VC-12 level switching at a finer granularity and the service grooming function.

2.3 Flexible Optical Switching Applications Compared to the traditional SDH equipments, the OptiX OSN 9500 has a cross-connect capacity up to six times that of the OptiX 10G. It accesses up to 72 STM-64 or 288 STM-16 services at most and incorporates the MADM and DXC functions in a single subrack. Services of different levels can be freely switched among arbitrary optical ports.

7



2.4 Abundant Service Types The OptiX OSN 9500 supports the service rate which maybe STM-64, STM-16, STM-4, STM-1 and Gigabit Ethernet. It also supports the VC-4-64c, VC-4-16c, VC-4-8c or VC-4-4c concatenated services.

2.5 Higher Integration Design The OptiX OSN 9500 features a higher integration design. A single subrack of it supports the VC-4 level optical switching up to 720G and provides 40 service slots. The service slots are fully used by the service boards without the need to plug in the optical amplifier board (the optical amplifier board can be plugged in other non-service slot). The OptiX OSN 9500 provides 1/2-port STM-64 line board, 2/4/8-port STM-16 line board, 16-port STM-4/STM-1 line board (STM-4 or STM-1 is optional), 16-port STM-1 electrical interface board, 6-port GE interface board. These circuit boards integrate the receiving module and transmitting module in one board. The higher integration design of the circuit boards greatly enhances the service access capability of the OptiX OSN 9500.

2.6 Easy Upgrade and Expansion The universal service slots of the OptiX OSN 9500 enable easy upgrades from low-rate system to high-rate system. The hot-swappable STM-16/STM-4/STM-1/GE optical interface modules offer incremental bandwidth increases as needed. Also, upgrading the cross-connect board makes the OptiX OSN 9500 scale from 400G cross-connect capacity to 720G cross-connect capacity.

2.7 Flexible Networking The OptiX OSN 9500 supports the following topological structures: mesh, chain, star, two-fiber/four-fiber ring, ring-with-chain, tangent rings, intersecting rings, Dual Node Interconnection (DNI).

2.8 Diverse Protection Mechanisms The OptiX OSN 9500 provides a variety of equipment and network-level protection mechanisms. 1. Network-level protection mechanisms 

8

1+1 or 1:N linear multiplex section protection


Error! Style not defined. 

STM-64/STM-16 two-fiber or four-fiber multiplex section protection ring



Sub-network connection protection (SNCP).



Mesh network protection

2. Equipment-level protection mechanisms 

Hot-standby 1+1 redundancy for the cross-connect board



Hot-standby 1+1 redundancy for the timing board



Hot-standby 1+1 redundancy for the system control & communication board



Hot-standby 1+1 redundancy for the power interface board



Centralized backup for the powers of line boards, JCOM board or optical amplifier board.

2.9 Powerful ECC Processing The OptiX OSN 9500 is equipped with powerful processor. Its state-of-the-art system bus structure enables a processing capability of 160-channel ECCs, meeting the requirements for complex networking.

2.10 Excellent Functionality

Network

Management

The Windows NT-based or Unix-based NM system, i.e. the OptiX iManager, is used for centralized Operation, Administration & Management (OAM) of the complex networks that are composed of the OptiX OSN 9500 and other OptiX series products. The OptiX iManager also accomplishes configuration and dispatching of circuits, ensuring the safe operation of the network.

2.11 Power Monitoring

Supply

and

Environment

The OptiX OSN 9500 guarantees a higher reliability of the performance by providing: 

Stand-alone power supply system for two –48V/-60V power feeds



Monitoring function for power voltage and environment temperature



Control for circuit board power-on and off



Centralized backup for the powers of the line boards, JCOM board and optical amplifier board.

9



2.12 Perfect SSM Management The OptiX OSN 9500 provides perfect Synchronous Status Message (SSM) function for management and protection switching of synchronous clock, thus enhancing the reliability of network.

2.13 Tandem Connection Monitoring (TCM) The OptiX OSN 9500 supports TCM function. TCM function is mainly used in inter-office application, especially at the boundaries of different network operators. The network operator byte N1 is allocated for TCM. With the TCM function, the number of errors that at the originating end and terminating end of the Tandem Connection are known. This helps to resolve the dispute between network operators.

10


Networking Application

1 Basic

Network

Topologies

Supported by the OptiX OSN 9500 The OptiX OSN 9500 incorporates the MADM and DXC function in one subrack and is flexible in networking. It deploys a variety of network configurations, including point-to-point, chain, ring, hub and mesh networks, as shown in Figure 2.

11



(a) Chain

(b) Two-fiber ring

(d) Ring-with-chain

(e) Tangent ring

(c) Four-fiber ring

(f) Insecting ring ·

(g) MESH network

Figure 2 Network configurations of the OptiX OSN 9500

The chain network and ring network are two basic topology structures of the SDH network. A variety of complex network topologies can derive from them in actual applications. Here is an introduction to a few common topologies that the OptiX OSN 9500 supports.

1.1 Chain Network Figure 3 shows a common chain network. A hub network can be formed by combining several chains at one point and the inter-chain service can be groomed on a need basis. Maximally the OptiX OSN 9500 can provide one of the chain combinations as below:

12



72 STM-64 chains



288 STM-16 chains



640 STM-4 chains



640 STM-1 optical chains



640 STM-1 electrical chains



Combinations of a number of STM-64, STM-16, STM-4, and STM-1 chains.



OptiX OSN 9500

OptiX SDH TM

Figure 3 Chain network

1.2 Ring Network The OptiX OSN 9500 can deploy STM-64/STM-16/STM-4/STM-1 ring networks and offer the following self-healing protection options as stipulated in the ITU-T recommendations, including: 

Two-fiber unidirectional multiplex section protection ring for STM-1 service



Two-fiber unidirectional multiplex section protection ring, two-fiber bi-directional multiplex section shared protection ring and four-fiber multiplex section protection ring for STM-64/STM-16/STM-4 services.

Figure 4 Ring network

1.3 Mesh Network Mesh network is a kind of network topology with the communication nodes connected directly. This flexible and extensible topology is the main network configuration deployed by the OptiX OSN 9500.

13



Figure 5 Mesh network

1.4 Complex Network Apart from the above basic networks, the OptiX OSN 9500 also supports:

14



Intersecting rings



Tangent rings



Ring-with-chain



Dual node interconnection (DNI) and single node interconnection (SNI)



Subtending rings



STM-1/ STM-4/ STM-16/ STM-64

Figure 6 Subtending rings

The OptiX OSN 9500 also supports trail protection and Sub-Network Connection Protection (SNCP). Moreover, it supports the equipment level service protection, which guarantees the survivability and the reliability of the whole transmission network.

15



2 Application in Networking 2.1 Application of Intelligent Feature The OptiX OSN 9500 enjoys some intelligent features. For example, it auto-configures the end-to-end service, supports Service Level Agreement (SLA) and provides traffic engineering control technique. 1. SLA Supporting SLA allows the OptiX OSN 9500 to provide differential service protection mechanisms as per the service levels. The telecom operators can segment the market, compete for more customer resources, and cost-effectively improve the service quality while meeting the growing demands of the customer. Table 2 Differential protection for different service levels

Service priority

Protection mechanism

Switching time

Service quality

High priority

1+1 protection (e.g. sub-network connection protection

Switching time: 0~40ms

Better

Middle priority

M:N protection (e.g. two-fiber and four-fiber multiplex section protection ring)

Switching time: 0~50ms

Rerouting

Fast re-route protection (e.g. real-time recomputation of the route)

Switching minute

Non–protection

Not protected

None

Extra

Not protected and preemptible

None

time:100ms~1

Worse

2. Dynamic bandwidth allocation in application The auto-configuration of the end-to-end service enables the OptiX OSN 9500 to realize dynamic bandwidth allocation which greatly increase the working efficiency of the customer. Figure 7 shows the typical application of intelligent features of the OptiX OSN 9500.

16



Figure 7 Intelligence features in application

As shown in Figure 7, dynamic bandwidth allocation cover the following steps:

(1)

The end user submits a demand for the network bandwidth.

(2)

The enterprise submits the demand for the network bandwidth.

(3)

The demand for network bandwidth is confirmed.

(4)

The bandwidth applied for is open for the user.

(5)

The billing center performs the billing operation.

3. Traffic engineering technique in application The traffic engineering control technique of the OptiX OSN 9500 allows to load balance traffic networkwide for convenient network planning and improved bandwidth availability.

17



(1) Traffic flows without traffic engineering technique

(2) Intelligent traffic flows with traffic engineering technique

Figure 8 Traffic engineering technique in application

As shown in Figure 8, the traffic engineering control can: 

Avoid the congested trail and node.



Avoid the high-risk trail and node.



Automatically Load balance traffic networkwide



Share the service load

4. Optical virtual private network (OVPN) in application OVPN is the virtual subnetwork defined by the VPN user on the public network. Here the subnetwork refers to both the subnetwork topology and the subnetwork resources, e.g. wavelength and timeslot. The OVPN made up by the OptiX OSN 9500 will not create overlay over the subnetwork resources, thus guaranteeing the dedication and privacy of the network for VPN users.

18



VPN1 VPN2

VPN1 VPN2

VPN2 VPN1

Figure 9 OVPN in application

Figure 9 shows two OVPNs (VPN1-defined and VPN2-defined). The OVPN users realize customized management and monitoring of the subnetworks. They can create and maintain new service connections and apply for addition or deletion of user. The network operators can create new VPN user, monitor the VPN status, add/delete user, change the bandwidth allocation and realize real-time billing.

2.2 Application of the Switching Functionality The large capacity VC-4/VC-12 service grooming functionality of the OptiX OSN 9500 cost-effectively simplifies the networking.

19



STM-64 four-fiber MSP ring

STM-1 two-fiber unidirectional MSP ring

STM-16 two-fiber bidirectional MSP ring

GE service VC-3/VC-12 grooming GSR

Switch

Figure 10 Multi-service switching functionality in application

Generally the network service is firstly groomed at VC-12 level and then converged, and then sent for higher order VC-4 level grooming. As shown in Figure 10, the OptiX OSN 9500 enables the telecom operators to conduct the VC-12 and VC-4 level grooming in an equipment, thus lowering the cost of networking. Note: Lower order VC-12 cross-connect function will be available in the next release of the OptiX OSN 9500.

2.3 Combined Application with the OptiX 10G and the OptiX 2.5G The abundant service interfaces of the OptiX OSN 9500 meet the demand for grooming service for metropolitan backbone network. The OptiX OSN 9500 can access STM-64, STM-16, STM-4, STM-1, GE services, etc. It can be combined with the DWDM equipment, the OptiX 10G, the OptiX 2.5G in MADM network configuration.

20



Metro 1100 network configuration STM-64 MADM network configuration

Metro 3100 network configuration

STM-16 MADM network configuration

Figure 11 Combined application with the OptiX 10G and the OptiX 2.5

21


System Structure

1 Functional Modules The OptiX OSN 9500 is designed in compliance with relevant international standards and ITU-T recommendations. The system structure is as illustrated in Figure 12.

22



Dispersion compensation unit (optional)

Interface unit

Interface unit

400G or 720G higher order crossconnect unit Optical amplifier unit (optional)

Auxiliary interface unit

Interface unit

Interface unit

System control & communication unit

Synchronous timing generation and interface unit

SD

Power interface unit

ProfessionalWorkstat ion

Key power backup unit

System communication unit

Electromechnic al information processing unit

NM

Figure 12 Functional structure of the OptiX OSN 9500 system

2. SDH Interface Interface unit unit The SDH interface unit of the OptiX OSN 9500 can be further divided into STM-64 optical interface unit, STM-16 optical interface unit, STM-4 optical interface unit and STM-1 optical interface unit. The STM-64 optical interface unit is mainly realized by the JL64/JD64 board which receives and transmits 1 or 2-channel STM-64 optical signals the maximum transmission distance of the JL64 board is 60km, the maximum transmission distance of the JD64 board is 40km. Combined with the optical amplifier board and the dispersion compensation board, the JL64/JD64 board enables a repeaterless transmission distance up to 120km. The STM-16 optical interface unit is realized by the JD16/JQ16/JO16 board which respectively access 2, 4, 8-channel STM-16 optical signals.

23



The STM-4/STM-1 optical interface unit is realized by the JH41 board which accesses 16-channel STM-4 or STM-1 optical signals (STM-4 or STM-1 optical interface is configured as per the actual requirement). 3. Gigabit Ethernet Ethernet process process unit The OptiX OSN 9500 provides the GE06 board for Gigabit Ethernet signal processing. The GE06 board supports LAPS, PPP and GFP protocols for the transparent transmission of Ethernet service and point-to-point service connection. 4. Cross-Connect Cross-Connect Unit Unit The OptiX OSN 9500 provides the GXCH or the EXCH board for cross-connect function. The GXCH/EXCH board implements the higher order VC-4 level cross-connect and provides the non-blocking cross-connect capacity up to 2560×2560 or 4608×4608 VC-4s. 5. Synchronous timing generation and interface unit The OptiX OSN 9500 provides the JSTG and the JSTI board for timing function. The JSTG board provides system clock for the system. When the system works under the locked mode, one of the line and external timing sources can be selected as the timing reference. Selecting timing sources from various priorities and using the S1 byte ensure the reliable operation of the network timing system. The system can also works under holdover mode or free-run mode. The JSTI board provides input and output ports for 2-channel external timing signals. 6. System control control & communication communication unit The OptiX OSN 9500 provides the JSCC board for system control & communication and the process of intelligent protocol and signaling. The intelligent protocol and signaling refer to the routing protocol and the connection-oriented GMPLS signaling that realize the intelligent service grooming. System control is achieved by the synchronous equipment management function (SEMF) module. The SEMF module collects the alarm and performance information of the other boards in the system and performs corresponding management operations. The communication function is achieved by the message communication function (MCF) module which communicates between the JSCC board and the other boards, and the NM terminal. The MCF module also exchanges OAM information with other NEs via DCC channels, thus facilitating the unified management of the NM system over this NE equipment and other NEs networkwide. 7. System communication communicati on unit The OptiX OSN 9500 provides the JCOM board for the communication of control information between the boards.

24



8. Engineering Orderwire unit The OptiX OSN 9500 provides the JEOW board for orderwire communication function. The JEOW board provides the maintenance interfaces, e.g. RS-232 interface, orderwire phone interface for the system and implements the orderwire communication using standard phone sets or via serial ports. 9. Power interface interface unit unit The OptiX OSN 9500 provides the JPIU board for the access and backup of DC power, EMI protection for DC power input port, stable voltage to the fan box. 10. Key power backup unit The OptiX OSN 9500 provides the JPBU board for the power backup of the maintenance bus module and the boards without equipment-level protection. All the interface boards and the JCOM board are fed with stand-alone power and provided with such centralized power backup. 11. Electromechanical Electromechan ical information informati on processing unit The OptiX OSN 9500 provides the EMPU board for the process and supervision of electromechanical information. The functions of the EMPU board include: 

Voltage monitoring for the 2-channel power inputs



Board temperature and voltage monitoring



Report of board information (collected by the maintenance bus) to the JSCC board



Intelligent fan-speed control, fan-speed check, cabinet indicators control, audible/visual alarm function



16-channel alarm inputs and 2-channel alarm output and alarm cascade function.

12. Optical amplifier amplifier unit unit The OptiX OSN 9500 provides the built-in JBA2 board and JBPA board respectively for 2-channel booster amplification purpose and pre-amplification purpose. 13. Dispersion compensation unit The OptiX OSN 9500 provides the JDCU board for dispersion compensation purpose. In such long-haul line system, e.g., the STM-64 optical port operates over transmission distance up to 40km with optical fiber, the optical fiber then should be

25


Error! Style not defined. dispersion-compensated.

Table 3 lists the system units of the OptiX OSN 9500, including the boards in each unit and their functions. Table 3 System units and the boards included and their functionality

System unit

SDH Interface unit

Board included SDH signal board

optical process

Functionality JD64, JL64, JO16, JQ16, JD16, JH41

Access and process STM-1/STM-4/STM-16/STM-64 optical signals and the concatenated VC-4-64c, VC-4-16c, VC-4-8c or VC-4-4c services.

Gigabit Ethernet interface unit

GE06

Realize the transmitting and receiving of 6-channel Gigabit Ethernet signal, encapsulation and de-capsulation of service data.

Cross-Connect unit

Higher order cross-connect board

GXCH, EXCH

Realize non-blocking higher order cross-connection of SDH signals at VC-4 level (up to 2560×2560 or 4608×4608 VC-4s).

Synchronous timing generation board

JSTG

Provide system clock

Synchronous timing interface board

JSTI

Provide the input and output ports for 2-channel external timing signals.

Timing unit

System control & communication unit

JSCC

Provide interface for connecting with NM system and process the SDH overhead bytes. Realize the system control & communication function and provide auxiliary data interface.

Communication unit

JCOM

Provide communication channels between the circuit boards.

Orderwire unit

JEOW

Provide the maintenance interfaces, e.g. RS-232 interface, orderwire phone interface for the system and implement the orderwire communication using standard phone sets or via serial ports.

Power interface unit

JPIU

Access the system power.

Key power backup unit

JPBU

Provide power backup for the circuit boards without equipment-level protection. The protected circuit boards include the interface boards and the JCOM board.

Electromechanical information processing unit

EMPU

Monitor the temperature and voltage of the circuit boards in the system.

26


System unit


Board included

Functionality

JBPA

Increase the transmitting optical power and pre-amplify the received optical power.

JBA2

Increase the transmitting transmission distance.

JDCU

Realize dispersion application.

Optical amplifier unit

Dispersion compensation unit

power

compensation

and

in

span

long

the

haul

27



2 Hardware Structure The OptiX OSN 9500 features a plug-in design in hardware structure. Circuit board is the basic functional unit. With boards of different functions installed in the subrack, equipment that differs in type and functionality is configured. The subrack is installed in the cabinet. Both the 2.2m-high and 2.6m-high cabinets can house two OptiX OSN 9500 subracks or be configured with one OptiX OSN 9500 subrack and several ODFs (up to six at most).

2.1 Cabinet There are two types of cabinets, which differ in height only. The dimensions are as follows: 

2200mm (H) % 600mm (W) % 600mm (D): 101kg;



2600mm (H) % 600mm (W) % 600mm (D): 112.3kg.

There is a power distribution box residing on the cabinet top for power access and distribution. The power distribution box has thirteen pairs of M6 studs (the upper stud and the lower stud as a pair and 26 studs in total). Five pairs of studs are for attaching 2-channel 48V/-60V inputs and the protective ground connections, using 2 five 25mm power cables. The remaining eight pairs are for 4-channel –48V/-60V power outputs to the subrack in the cabinet. The thirteen pairs of studs are separated with insulating materials and this connecting area is protected with a cover panel.

2.2 Subrack The dimensions of the OptiX OSN 9500 subrack are: 900mm (height) % 530mm (width) % 545mm (depth). The OptiX OSN 9500 subrack is divided into upper enclosure and lower enclosure. The boards can be plugged into the front slots and the back slots. All the external interfaces of the subrack reside on the front panels of these circuit boards. As shown in Figure 13, both the boards in front slots and back slots are 322.25mm x 218.5mm in size. The width of the front panel of the GXCH/EXCH board is 60.96mm and that of the PIU board is 50.8mm, and that of the remaining boards is 30.48mm. About 52.2mm spacing in the middle and lower parts of the subrack is left free for wiring purpose.

28



1. Front mounting ear 3. Handle 5. Back mounting ear (it is installed after installing the

2. Front plug-in frame 4. Upper and lower slot areas 6. Fan tray assembly

subrack into the cabinet ) 7. Back plug-in frame

8. Wiring trough Figure 13 The OptiX OSN 9500 subrack

The OptiX OSN 9500 subrack is composed of: Fan tray assembly: there are two fan trays, one plugged in the front of the subrack and the other in the back. The fan trays exactly reside below the cabinet top and are included in the upper enclosure of the subrack. Warm air exhausts out the equipment by drawing in cool air via the fans. Board slot areas (front and back): the front board slot area can be configured with 32 interface boards at most, each interface board accessing the data traffic up to a capacity of 20G. The back board slot area can be configured with 8 interface boards at most, each interface board accessing the data traffic up to a capacity of 10G. The other back slots are for the JSCC, GXCH/EXCH, JCOM, JSTG, JSTI, JEOW, JPBU and JPIU boards. The circuit boards and their corresponding slots are listed in Table 4. As no special interface area is designed on the faceplate of the subrack, all external

29



interfaces reside on the front panels of the circuit boards. Wiring trough: about 52.5mm spacing is left free for wiring purpose in the middle and the lower part of the subrack. The optical jumpers led out from the optical interfaces are then routed to the side of the cabinet via the wiring trough. Fiber spool: There are eight fiber spools installed at the side of the subrack to take up the slack.

2.3 Circuit Board Board slot areas of the OptiX OSN 9500 is as shown in Figure 14 and Figure 15. 530mm

Fan tray assembly and nameplate 1 2

3 4

5

6

7 8

9 10 11 12 13 14 15 16

I I I I I I I I I I I I I I I I U U U U U U U U U U U U U U U U

m m 0 0 9

Upper wiring trough 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Front slot area

I I I I I I I I I I I I I I I I U U U U U U U U U U U U U U U U

Lower wiring trough Dust-proof net

Figure 14 Front view of the OptiX OSN 9500 subrack

30



530mm

Fan tray assembly and nameplate 1 2

3 4 5

6

7

8

9 10 11 12 13

P E S S I I B O C C U U U W C C

X C H

X C H

I I S E P U U T P I I U U

Upper wiring trough 14 15 16 17 18 19

20

21

22 23 24 25 26

D S S C I I C I I O U U U G G M

X C H

X C H

I I S S P U U T T I G G U

Back slot area

m m 0 0 9

Lower wiring trough Dust-proof net

Figure 15 Back view of the OptiX OSN 9500 subrack

Note: The positions of the SIG slots, i.e. the preserved slots for intelligent signaling process boards, are shown in Figure 15. Optical amplifier board or dispersion compensation board can be inserted in the SIG slot, without the need to occupy the service slots.

Table 4 lists the circuit boards used by the OptiX OSN 9500.

31



Table 4 List of the circuit board

32

Abbreviation

Board name

Corresponding Slot

JSCC

System Control & Communication Board

SCC

GXCH

General High Order Cross-connect Board

XCH

EXCH

Enhanced High Order Cross-connect Board

XCH

JSTG

Synchronous Timing Generator Board

STG

JSTI

Synchronous Timing Interface Board

STI

JCOM

System Communication Board

COM

JEOW

Orderwire Board

EOW

JPIU

Power Interface Board

PIU

JPBU

Key Power Backup Board

PBU

EMPU

Electromechanical Board

JAFB

System Backplane

None

JD64

2×STM-64 Optical Interface Board

IU (front)

JL64

STM-64 Optical Interface Board

IU

JO16


IU (front)

JQ16


IU

JD16


IU

JLHE

16 xSTM-1e optical interface board

IU

JH41

16 xSTM-1 optical interface board

IU

GE06

6-port Gigabit Ethernet Process Board

IU

JDCU

Dispersion Compensation Board

IU/DCU

JBA2

Booster Amplifier Board

IU

JBPA

Pre-amplifier Board

IU

JFAN

Fan Control Board

FAN

Information

Process

EPU



Note: The JD64/JO16 boards are inserted in the front slots of the subrack. They can be inserted in F1~F32 IU slots when the equipment is configured with the cross-connect capacity of 4608×4608 VC-4s and in F7~F10 and F23~F26 IU slots when the equipment is configured with the cross-connect capacity of 2560 ×2560 VC-4s.

33



3 Software Structure The software system of the OptiX OSN 9500 is of modular structure, composed of three modules: board software, Network Element (NE) software and NM system. The three modules reside respectively on the functional boards, system control & communication board and the NM computer, each performing a specific function. Software structure of the OptiX OSN 9500 is shown in Figure 16. In the figure, all modules are recognized as NE software except "Network Management System" and "Board Software". Below is the description of the functions of the three modules and how the functions are implemented. NM system

1

1 Communication module

Real-time multi-task operating system

Equipment management module

Database management module

Inter-board communication module

1 Board software

Figure 16 Software structure of the OptiX OSN 9500

The NE software and the board software of the OptiX OSN 9500 is designed on the new generation OptiX Software Platform (OSP). The OSP provides the module based software structure as below.

34



Intelligent control layer User interface layer

Network protocol layer Service control layer System application layer Standard protocol stack layer

Unified communication mechanism layer VOS layer

Figure 17 Module based software structures of OSP

Virtual operating system (VOS) layer : VOS layer shields the effect of the operating system and the CPU on the application system, thus realizing the portable application program among the CPUs and the operating systems. Unified communication mechanism layer: This layer allows unified communication across disparate types of underlying communication mechanisms, and provides unified interface for application program. In this way the application program can execute without the need to adapt to different communication mechanisms and physical media. And a distributed communication system can be supported with the portability of the application program. System application layer: this layer provides the functionality below for the software system: software management functions(for example software upload and version management etc.); database management, “black box” function, system monitoring and maintenance, operation log recording, file system support, safe management, active/standby switchover mechanism of the system control & communication board, etc. Service control layer: this layer includes configuration module, alarm module, performance module, protection switching module etc., providing service provisioning and monitoring function. Network protocol layer: this layer deals with layer 3 based network processing. The functions includes: TCP/IP protocol stack processing, basic route protocol processing and route strategy management etc, thus realizing automatic and intelligent network topology. Intelligent control layer: this layer implements the functionality of control panel in the intelligent optical network, thus separating the control panel and the data panel. The basic functions include: GMPLS-based signaling protocol, OIF-compliant GMPLS architecture, service route algorithm, GMPLS-based service protection and recovery etc.

35



User interface layer: this layer is in charge of access management for NM system and command lines. The OptiX OSN 9500 provides Qx interface for communication between the host and the NM system, and uses the Navigator of Huawei Technologies as the command line terminal Besides, this layer supports remote ftp access and remote file upload & download. The intelligence associated software is represented in a control panel which is layered on top of the data panel. The control panel interacts with the data panel to realize auto-configuration of service and provide service protection based on user levels. The relation between the control panel and the data panel is shown in Figure 18: Service route algorithm

Protection and recovery

Signaling

Control panel Resource agent (master)

Interface adaptation

Resource agent (slave) Data panel

Configuration module

Performance module

Alarm module

Safety module

Figure 18 Relation between the control panel and the data panel

The data panel undertakes the service configuration management of the OptiX OSN 9500 and provides SDH-based protection for services. The control panel can be regarded as one client of the data panel. Via the interface adaptation mechanism, the resource agents of the control panel and the data panel interact with each other to get the resource allocation status and implement function provisioning.

3.1 Board Software The board software runs on each circuit board, managing, monitoring and controlling the operation of the circuit boards. It receives the command issued from the NE software and reports the board status to the NE software in terms of performance and alarm events. It can directly control the functional circuits in the corresponding board and implement ITU-T compliant specific functions of the NE. The specific functions include: alarm management, performance management, configuration management and communication management.

36



3.2 NE Software 

Real-time multi-task operating system

The real-time multi-task operating system of the OptiX OSN 9500 NE software is responsible for managing public resources and supporting application programs. It isolates the application programs from the processor and provides an application program execution environment which is hardware independent. 

Inter-board communication

Two types of inter-board communication modes are used by the OptiX OSN 9500: bus mode and LAN SWITCH mode. According to the corresponding communication protocol, communication between the NE software and the board software is implemented for information exchange and equipment maintenance. On one hand, inter-board communication module sends the maintenance and operation commands issued from the NE software to the boards, and On the other hand, it reports the board status, alarm and performance events to the NE software. 

Equipment management module

Equipment management module is the kernel of the NE software for implementing network element management. It includes Manager and Agent. Manager can send network management operation commands and receive events. Agent can respond to the network management operation commands sent by the manager, implement operations to the managed object and submit events according to state change of the managed object. 

Communication Module

The communication module exchanges management information between NM system and NE and among NEs. It further consists of network communication module, serial communication module and ECC communication module. 

Database management module

The database management module is an effective part of the NE software. It includes two independent parts: data and program. The data are stored in databases, e.g. network database, alarm database, performance database and equipment database. The program accesses and manages the data in the database.

3.3 NM System The NM software runs on the workstation or PC, mainly managing the equipment and the transmission network. It enables the user to unifiedly operate and maintain the transmission equipment. The management functionality include: equipment configuration management, fault and performance management, end-to-end circuit configuration, network resource analysis and allocation. The network management system exercises a unified management of the optical

37


OptiX OSN 9500 Intelligent Optical Switching System System Description transmission network and provides maintenance function for all Intelligent Optical Node (ION), SDH, Metro, DWDM NEs on the entire network. In compliance with ITU-T Recommendations, it is a network management system integrating standard management information model and object-oriented management technology. It exchanges information with NE software via the communication module to implement monitoring and management over network equipment.

38


Reliability Design

With multiple up-to-date protection techniques employed in hardware and software design, the OptiX OSN 9500 provides various protection mechanisms for the network, thus guaranteeing a top-quality transmission service.

1 Equipment Protection 1.1 Hot-standby 1+1 Redundancy for Key Functional Modules The OptiX OSN 9500 provides hot-standby redundancy protection for key functional modules. When fault occurs to the working modules, the system will automatically groom the services that are preset to be protected to the standby module. This active/standby scheme is 1+1 hot standby. Figure 19 is the schematic diagram of this scheme.

39



Active

Standby

Figure 19 1+1 protection

The OptiX OSN 9500 supports the equipment level service protection for the functional modules below: 

Hot-standby 1+1 redundancy configuration for the general/enhanced high order cross-connect board GXCH/EXCH.



Hot-standby 1+1 redundancy configuration for the synchronous timing generation board.



Hot-standby 1+1 redundancy configuration for the system control & communication board JSCC.



Hot-standby 1+1 redundancy configuration for the power interface board JPIU.



Mutual backup of -48V/-60V DC power input. The operation of the equipment will remain normal in the case that a fault occurs to either of the two external power inputs.



Centralized backup for the powers of line boards, JCOM board or optical amplifier board

1.2 Protection in Abnormal Conditions 

Maintenance alarm for abnormality

An alarm will be generated to notify the network monitoring terminal once any abnormality is detected in the system by the hardware or software. The board software will monitor the inter-board communication status of the High Digital Link control (HDLC) channels between the line board and the system control & communication board, between the line board and the timing board, between the line board and the cross-connect board. Once any abnormality is detected, an alarm will be generated and the board will be set to “not in position”. Each line board provides self-check to its system clock and the clocks of the active/standby timing board. Once any abnormality is detected, an alarm will be generated and the board will be set to “not in position”.

40



Power supply protection

The equipment provides reverse polarity protection for the power supply. The JPIU board is also protected against undervoltage, overvoltage and thunderstroke. This guarantees no damage to the system and the power supply when the common abnormalities occur. The system can provide active/standby –48V/-60V power voltage for the circuit boards and provide the protection against low voltage as well, which reduces the risk of service interruption due to damage to the power module of the board. Through the maintenance bus, the system can also monitor the board temperature and voltage. All boards are hot-swappable and powered by high-frequency power modules in an effective and reliable manner, and provided with overcurrent and overvoltage protection function. Meanwhile, board hardware is designed in such a way that CPU will be reset and the software will reinitialize the chip in case of undervoltage. 

Protection on CPU power-off and software reset

SRAM database or FLASH database is used to provide backup for the program and data files of application software, so the software can recover the exact program and data after CPU power-off or software reset. 

Power failure resuming protection and break-point resuming protection

The BIOS on the board is write-protected and can not be modified. The program and data files of application software, which can be loaded on-line, are configured with check function to avoid data transmission error. After the software loading is interrupted, the BIOS waits for resuming execution instead of starting the program or data files already loaded. 

Software upgrading protection

Two copies of NE software are stored in the system control & communication board so that a new version of the software can be loaded without affecting the current software running. The old version software will be replaced by the new version once it is confirmed as correct. This replacement does not affect the configuration information already set or NE equipment service. The old version of the software will continue to function if software upgrading fails.

1.3 Software Fault-Tolerance The software design of the OptiX OSN 9500 features: CMM for regulating management & development process, the idea of software engineering, extensive software quality assurance activities, the top-down program design and the object-oriented design. With these up-to-date software development, management and design technique, the quality and reliability of software are guaranteed. The layered modular design enables the software system easy for maintenance and extension. The software realizes IC design, simple module interface, high cohesion and low coupling.

41


OptiX OSN 9500 Intelligent Optical Switching System System Description The CPU has powerful load-balance and overload processing capability by adopting advanced method of driving and grooming traffic. It provides multi-level protection to software program and data, and is capable of self-check and self-recovery. The board software provides mirror protection to the important registers, thus protecting the hardware against the influence of any abnormalities like voltage fluctuation. The inter-board communication adopts check and retransmission mechanism to avoid any error on the link transmission of the hardware. The internal watchdog circuit is used inside CPU to avoid software deadlock and to ensure no service is impaired in case of soft reset of the software. Software is made more reliable with software platform technique, code sharing and reusing, and extensive multiplexing of available mature software modules. Loopback alarm is provided to notify the user, without hits on the ongoing DCC communication.

1.4 Data Security The security is improved by adopting database module to perform unified management on the data. Both the database and database files have their own data check function. The database files are provided with hierarchical protection according to the importance of the data, so the error in the lower-level database will not affect the higher-level database. The database has one backup in SRAM and two backups in FLASH. The two sets of databases in FLASH provide protection to each other and backup protection to the database in SRAM.

42



2 Network Protection The OptiX OSN 9500 features outstanding self-healing network protection and can provide multiple protection mechanisms at SDH layer against optical fiber break, line board damage or node failure. These protection mechanisms include path protection, multiplex section (MS) protection and subnetwork connection protection (SNCP), etc. The protection switching time is less than 50ms. The ITU-T-compliant or other international standards compliant self-healing protection mechanisms include: 

1+1 or 1:N linear MS protection



Self-healing ring protection (two-fiber bidirectional MS shared protection ring, two-fiber unidirectional MS dedicated protection ring, four-fiber bidirectional MS shared protection ring)



Interconnection service protection in DNI and SNI mode



Sub-network connection protection (SNCP).



Shared-fiber virtual path protection



Mesh network protection

Below is the introduction to the protection mechanisms.

2.1 Linear MS Protection The OptiX OSN 9500 supports both 1:1 and 1:N linear MS protection (1 ñ N ñ 14) with the switching time less than 50ms, satisfying the requirement of the ITU-T recommendations.

2.2 Ring Network Protection Ring network is also called self-healing ring. The OptiX OSN 9500 can be used to form MS protection ring. 1. Two-fiber bidirectional MS shared protection rings The biggest advantage of two-fiber bidirectional MS protection ring is the higher utilization ration of the ring capacity. Figure 20 shows the working channel and protection channel in the two-fiber MS shared protection rings.

43


Error! Style not defined. CA

AC

S1/P2

A

S2/P1

B

D

C

a) Normal CA

AC

CA

AC

S1/P2 Bridging

A

S2/P1

Switching

B

Fiber cut

D

C

Switching

Bridging Working channel

b) Protection switching

CA

AC

Protection channel

Figure 20 Two-fiber bi-directional MS shared protection rings

The switching time in a two-fiber protection ring composed of the OptiX OSN 9500 is less than 50ms, complying with ITU-T Recommendations.

44


OptiX OSN 9500 Intelligent Optical Switching System System Description The timeslots of two-fiber bidirectional MS shared protection rings can be re-used, which increases the transmission capacity of the ring up to k/2 × STM-N (k is the total number of nodes on the ring network). Normally the protection channels P1 and P2 are idle and they can be used to transmit extra traffic. The two-fiber bidirectional MS protection rings are especially suitable for the network configuration with decentralized traffic flows. That is to say, in the ring network the traffic flows between the nodes, especially the adjacent nodes are dense and evenly distributed. 2. Two-fiber unidirectional MS dedicated protection rings The two-fiber unidirectional MS dedicated protection rings comprise a working ring with traffic transmitted clockwise around the S optical fiber and, a protection ring with traffic transmitted counter-clockwise around the P optical fiber, as shown in Figure 21.

45



CA

AC

A

S fiber

P fiber

B

D

C

CA

a) Normal CA

AC

AC

S fiber Bridging

A

P fiber

B

Fiber cut

Switching D

C

b) Protection switching

CA

AC

Working fiber Protection fiber

Figure 21 Two-fiber unidirectional MS dedicated protection rings

As no service traffic is fed to the protection fiber P of the two-fiber unidirectional MS protection rings, extra traffic can be transmitted over the idle protection fiber. This increases the transmission capacity of the ring network up to 2 ×STM-N if no fault

46


Error! Style not defined. occurs to the network.

3. Four-fiber bidirectional MS shared protection rings This ring network is composed of four optical fibers, two of which are working fibers and marked as S1 and S2. Traffic is independently transmitted clockwise around the S1 optical fiber and counter-clockwise around the S2 optical fiber in the ring network. The other two fibers are protection optical fibers and marked as P1 and P2. Traffic is transmitted counter-clockwise around the P1 optical fibers and clockwise around the P2 optical fibers in the ring network, providing protection for the traffic transmitted in the working optical fibers.

47



CA

AC

A

S1

P1

P2

S2

D

C

a) Normal CA

AC

S1

A

B

CA

AC

P1

P2

S2

Bridging

Switching

B

Fiber cut

D

Working fiber

C

Bridging b) Protection switching

CA

Switching

AC

Protection fiber

Figure 22 Four-fiber MS shared protection rings

Four-fiber bidirectional MS shared protection rings have three advantages as below: 

48

The timeslots can be re-used to increase the transmission capacity up to



k×STM-N (k is the total number of nodes in the ring network). 

Extra traffic can be transmitted over the protection fibers P1 and P2.



Span protection is available.

2.3 Protection of Inter-ring Interconnection Traffic The inter-ring interconnection traffic can be protected in Single Node Interconnection (SNI) mode and Dual Node Interconnection (DNI) mode. For DNI protection, the functionality of the OptiX OSN 9500 is fully in compliance with the ITU-T Recommendation G.842. Figure 23 shows the DNI protection for the traffic between the Node A (Ring 1) and Node J (Ring 2). Both Ring 1 and Ring 2 are MS shared protection rings.

49



A

B

E Ring 1 MS shared protection ring P

C

S

D

SS

Ts

Tp

SS

J

P

F

S

G

H

Ring 2 MS shared protection ring

I P

Point

S

Slave node

SS

Service selector

Protectionchannel Working channel

Figure 23 Interconnection service protection between MS shared protection rings

The DNI has an advantage in its protection functionality for the traffic crossing from one ring to the other, especially for the node failure.

50



2.4 Sub-Network (SNCP)

Connection

Protection

The OptiX OSN 9500 features powerful higher order cross-connect and overhead processing capability. This helps to realize higher order SNCP. The OptiX OSN 9500 allows the switching of multiple SNCPs, and the system can ensure that the switching time of such multiple SNCPs is less than 50ms, fully satisfying the requirement of ITU-T Recommendations G.841 and G.842.

Subnetwork 1

SNC originating end

SNC terminating end

Workingchannel NE A

Protection channel

NE B Subnetwork 2

Service selection

Figure 24 Subnetwork connection protection

2.5 Shared-fiber Virtual Path Protection Shared-fiber virtual path protection is to logically divide one optical channel such as STM-64/STM-16/STM-4 optical channel into higher or lower order paths. These logical paths can be collocated with other links in path level to form logic rings. These rings support various protection mechanisms, such as multiplex section protection, SNCP. In Figure 25 and Figure 26, the OptiX OSN 9500 products build up an STM-64 MS protection ring. Part of the OptiX OSN 9500 products in the ring plus another ADM equipment also form a virtual STM-16 fiber-share path protection ring.

51



STM-16 SNCP

STM-64 MSP Ring


STM-64 MSP Ring

STM-16 SNCP


2.6 Mesh Network Protection Mesh network achieves a higher reliability because there are multiple routes available between two modes. This effectively protects the traffic against node congestion and node failure. Compared with the ring network, the mesh network takes advantages in bandwidth availability, network scalability and survivability. This network topology is suitable for the area with large capacity traffic averagely distributed. Non-intersecting recovery: The recovery route for the end-to-end traffic can be preset and, this recovery route is not intersected with the traffic route, as shown in Figure 27 (1) and (2). Link failure dependent recovery: the recovery route is dependent on the location of link failure, as shown in Figure 27 (3), (4), (5). Local processing recovery: Local processing for the link failure is available, but the node failure can not be recovered, as shown in Figure 27 (6), (7), (8).Figure 27 shows the non-intersecting recovery.

52



(1)

(2) Traffic route Recovery route

Figure 27 Mesh network protection: non-intersecting recovery

Figure 28 shows the link failure dependent recovery. The three maps in Figure 28 display three recovery routes corresponding to three locations of link failures.

53



(3)

(4)

Traffic route Recovery route Link failure

(5)

Figure 28 Mesh network protection: failure route dependent recovery

Figure 29 shows the local processing recovery. There are three maps in Figure 29. Map (6) illustrates the traffic routes in normal condition. Maps (7) and (8) display two types of link recoveries.

54



Traffic route 1 Traffic route Traffic route 2

Recovery route Link failure

(6)

Recovery routes for traffic route 1

(7)

(8)

Recovery routes for traffic route 2

Figure 29 Mesh network protection: local processing recovery

55


Operation,

Administration

&

Maintenance

1 Operation and Maintenance The OptiX OSN 9500 has made great improvement in its cabinet, board and function design to satisfy the requirement of users in the operation and maintenance of the equipment. It provides powerful equipment maintenance capabilities, including:

56



Through the maintenance & monitoring bus, the OptiX OSN 9500 realizes the maintenance and environment monitoring function. It provides real-time monitoring of the board voltage and temperature, controls board power-on and power-off, and works in conjunction with the JSCC board to handle faults.



The system provides backup for the service data, which features the network troubleshooting and maintenance.



The cabinet generates audible and visual alarms to notify the network administrator to take proper measures in case of any faults.



Six external alarm inputs and two cabinet alarm outputs are provided to ease operation and management of the equipment.



All boards are provided with indicators showing the running and alarm status to help network administrator locate and handle faults as soon as possible.



Orderwire phone function is provided to ensure dedicated communication channels for administrators of various stations.



By means of NM system, it is possible to dynamically monitor the equipment running and alarm status of all stations on the network. NM system will give sound alarm once any alarm occurs.



In-service upgrade and upload of the board software, NE software and data are supported.



Remote maintenance function is available. The maintenance personnel can remotely maintain the OptiX OSN 9500 on public switched telephone network.

57



2 OptiX iManager NM System The OptiX OSN 9500 is managed by the OptiX iManager in a unified way. The OptiX iManager is designed in compliance with relevant ITU-T Recommendations. It can manage, maintain and test the fault, performance, configuration, security and other aspects of the whole optical transmission system through Qx interface. It also provides end-to-end management function as required by the user. The NM system improves the quality of network services, reduces the maintenance cost and ensures rational use of network resources. Huawei Technologies is capable of providing the whole series of optical network transmission systems that run on networks of different layers. To effectively manage the subnetworks, LANs or nationwide networks, the NM system needs the basic operation and maintenance functions as well as the capability of monitoring and managing the transmission network. The Telecommunications Management Network (TMN) is divided into Network Element Layer (NEL), Element Management Layer (EML), Service Management Layer (SML) and Business Management Layer (BML). The network element management system manages the Network Element (NE) equipment in a subnetwork, and the NM system manages the provisioning, fault monitoring, performance analysis, resource analysis and circuit grooming of a large-scale network at the network layer. To adapt to networks existing at different layers and having various scales, the OptiX iManager family of Huawei Technologies includes local craft terminal, NE management system, regional network management system and network management system. These NM products cater to the applications from element management layer, subnetwork management layer to network management layer and include partial functionality of business management layer. The OptiX iManager family supports the unified management of ION, SDH, DWDM and Metro equipments. Based on these NM products, Huawei technologies provides telecom operators with a complete network management solution that caters to the applications from small scale and single service to large scale and multiple services.

58


Technical Specifications

This chapter deals with the technical specifications of the OptiX OSN 9500.

1 System Features 1.1 Applications As the intelligent optical switching system, the OptiX OSN 9500 can configure the DXC and MADM in a single equipment.

1.2 Intelligent Features The OptiX OSN 9500 features powerful service grooming capability and dynamic bandwidth allocation. Its traffic engineering control technique allows it to dynamically plan and allocate bandwidth, thus achieving load-balance traffic networkwide and decreasing the congestion rate on the network. The OptiX OSN 9500 has realized automatic operation in applying for bandwidth, allocating and managing bandwidth. In addition, it can provide differential service and auto-sensing features and, GMPLS-based protection and recovery of the traffic.

1.3 Service Switching Capability The cross-connect and access capabilities provided by the OptiX OSN 9500 are shown in Table 5.

59



Table 5 Cross-connect and access capabilities of the OptiX OSN 9500

Higher cross-connect

order

Maximum access capacity

Cross-connect mode

Index

Cross-connect or access level

2560×2560 or 4608×4608 VC-4s

VC-4

400G or 720G

STM-64, STM-16, STM-4, STM-1 (optical)

In any mode between the interfaces

Note: The maximum access capability in the table is dependent on the cross-connect capacity of the cross-connect board.

1.4 Multiplexing and Mapping Structure The mapping structure adopted by the OptiX OSN 9500 complies with the ITU-T Recommendation G.707.

60



x1 STM-64

x 64 STM-16

AU-4-64c

VC-4-64c

C-4-64c

8912896kbit/s

AU-4-16c

VC-4-16c

C-4-16c

2228224kbit/s

C-4-4c

557056kbit/s

C-4

139264kbit/s

x4 x1 x 16

x 16

x4 x1

STM-4

VC-4-4c

AU-4-4c

x4

STM-1

x1

AUG

x1 VC-4

AU-4

x3 TUG-3

x3

AU-3

x1

TU-3

VC-3

VC-3

C-3

44736kbit/s 34368kbit/s

x7 x1 TUG-2

Mapping scheme adopted by ETSI and China

TU-2

C-2

6312kbit/s

VC-12

C-12

2048kbit/s

VC-11

C-11

1544kbit/s

VC-2

x3 TU-12

Mapping x4

Aligni ng

TU-11

Multiplexing

Figure 30 Multiplexing and mapping structure

1.5 Interface Type The available interface types provided by the OptiX OSN 9500 are shown in Table 6. Table 6 Interface Type

Interface Type

Rate and Characteristics

SDH optical interface

155520kbit/s, 622080kbit/s, 2488320kbit/s, 9953280kbit/s

Ethernet interface

GE

Clock interface

2048kbit/s, 2048kHz

Auxiliary Interface

Administration interface, orderwire phone interface, data interface, 10BASE-T, 10BASE-T

1. Optical Interface The types of optical interfaces provided by the OptiX OSN 9500 are listed in Table 7.

61



All of these optical interfaces comply with ITU-T Recommendation G.691. Table 7 Optical interface types of the OptiX OSN 9500 STM-1 optical interface

L-1.1, L-1.2

STM-4 optical interface

L-4.1, L-4.2

STM-16 interface

optical

I-16, S-16.1, L-16.1, L-16.2, V-16.2, U-16.2.

STM-64 interface

optical

I-64.2r, I-64.2, S-64.2a, S-64.2b, L-64.2b, V-64.2a

Optical fiber connector: 2. Clock Interface The clock interface types provided by the OptiX OSN 9500 are listed in Table 8. Table 8 Clock characteristics of the OptiX OSN 9500 External synchronization source

Two 2048kbit/s (G.703 §6) clock signal inputs or two 2048kHz (G.703 § 10) clock signal inputs.

Synchronization output

Two 2048kbit/s (G.703 §6) clock signal outputs or two 2048kHz (G.703 § 10) clock signal outputs.

3. Auxiliary Interface The auxiliary interfaces provided by the OptiX OSN 9500 are listed in Table 9. Table 9 Auxiliary Interfaces provided by the OptiX OSN 9500

62

Administration interface

Ethernet interface, RS-232C interface, F&f i nterface

Orderwire phone interface

1 two-line orderwire phone interface and 2 SDH network node interfaces.

Data interface

1 64kb/s codirectional data interface; 4 RS-422/RS-232 serial interfaces (RS-422/RS-232 interface is optional for configuration)



1.6 Mechnical Structure The mechanical structural components of the OptiX OSN 9500 are listed in Table 10. Table 10 Mechanical structural components of the OptiX OSN 9500

Specifications

Remarks

Cabinet

2200mm(H) 600mm(W) 600mm(D), % % 2600mm(H) % 600mm(W) % 600mm(D)

the OptiX OSN 9500 subrack

900mm(H) % 530mm(W) % 545mm(D).

1.7 Power Supply and Power Consumption Voltage: -38.4~-72VDC Maximum system power consumption: 2500WMaximum power consumptions of circuit boards are listed in the table below (error percentage<10%). Table 11 Maximum power consumption of circuit boards

Circuit board

Power consumption (W)

Circuit board

Power consumption (W)

JD64

54

GXCH

70

JL64

50

EXCH

80

JO16

50

JCOM

33

JD16

55

SLH41

31.34

JSTG

24

EMPU

10

Note: Not all the power consumptions of the circuit boards are listed in the table because some power consumptions can not be confirmed currently.

63



1.8 Environmental Conditions The environmental conditions demanded by the OptiX OSN 9500 are listed in Table 12. Table 12 Environmental Conditions

Environmental Conditions

Temperature

Humidity

Long-term operation

5°C~40°C

20~80%

Short-term operation

0°C ~45°C

10~90%

Transportation and storage

-40°C ~70°C

≤95%

Item

Note: Short-term operation condition means that the continuous working time should be less than 72 hours and the accumulated working time for the entire year not more than 15 days.

64



2 Main Indexes of the OptiX OSN

9500 2.1 Optical Interface Specifications 1. Optical Interface Parameter specifications Optical interface classification Different transmitting optical powers and receiver sensitivities may lead to applications with different transmission distances. The classification of the optical interfaces supported by the OptiX OSN 9500 is shown in Table 13. Table 13 Application codes of optical interfaces

Inter-office Short-distance

Long-distanc e

Very long-dis tance

Ultra long-dist ance

1310

1550

1310

1550

1550

1550

G.652

G.652

G.652

G.652

G.652

G.652

STM-1

L-1.1

L-1.2

STM-4

L-4.1

L-4.2

L-16.1

L-16.2

V-16.2

U-16.2

L-64.2b

V-64.2a

Application

Intra-office

Optical source nominal wavelength (nm)

1310

Fiber type

STM Level

Multi-m ode

1550

G.652

G.652

G.652

STM-1 6 STM-6 4

G.652

S-16.1

I-64. 2r

I-64. 2

S-1.1

S-64.2

Optical interface parameters Parameter specifications for different optical interface types are respectively shown in Table 14, Table 15, Table 16, Table 17 and Table 18. All the optical interfaces of the OptiX OSN 9500 comply with these specifications.

65




Item

Unit

Values

Digital signal nominal bit rate

kbit/s

STM-1

Application code Operating wavelength range

nm

Source type

Transmitter at reference point S

Optical path between S and R

Receiver at reference point R

66

155520

L-1.1

L-1.2

1280-1335

1480-1580

MLM

SLM

Maximum RMS width (σ)

nm

3

-

Maximum -20dB spectrum width

nm

-

1

Minimum side mode suppression ratio

dB

-

30

Maximum mean launched power

dBm

0

0

Minimum mean launched power

dBm

-5

-5

Minimum extinction ratio

dB

10

10

Attenuation range

dB

10-28

10-28

Maximum dispersion

ps/nm

246

NA

Minimum Optical Return Loss of cable plant at S, including any connectors

dB

NA

20

Maximum Discrete between S and R

dB

NA

-25

Minimum Sensitivity

dBm

-34

-34

Minimum Overload

dBm

-10

-10

Maximum Optical Path Penalty

dB

1

1

Maximum Reflectance of the Receiver Measured at R

dB

NA

-25

Mean launched power

Reflectance




Item

Unit

Values


kbit/s

STM-4

Application Code Operating Wavelength Range

nm

622080

L-4.1

L-4.2

1300-1325/

1480-1580

1296-1300 Source type



MLM

SLM

Maximum RMS width

nm

2.0/1.7

-

Maximum -20dB width

nm

-

<1


dB

-

30


dBm

2

2


dBm

-3

-3


dB

10

10

Attenuation range

dB

10-24

10-24

Maximum dispersion

Ps/nm

92/109

2400

Minimum optical return loss of cable plant at S, including any connectors

dB

20

24

Maximum discrete reflectance between S and R

dB

-25

-27

Minimum sensitivity

dBm

-28

-28

dBm

-8

-8

dB

1

1

dB

-14

-27

Mean launched power

Minimum overload Receiver at Maximum optical path penalty reference point R Maximum reflectance Measured at R

of

receiver

67




Item

Unit

Values


kbit/s

STM-16

Application code Operating wavelength range

nm

Source type



S-16.1

S-16.2

L-16.1

L-16.2

1260-1360

1430-1580

1280-1335

1500-1580

SLM

SLM

SLM

SLM

-Maximum RMS width

nm

-

-

-

-

Maximum -20dB width

nm

1

<1

1

<1


dB

30

30

30

30

Mean launched power Maximum launched power

mean

dBm

0

0

3

3

Minimum launched power

mean

dBm

-5

-5

-2

-2


dB

8.2

8.2

8.2

8.2

Attenuation Range

dB

0-12

0-12

10-24

10-24

Maximum dispersion

ps/nm

NA

NA

1200-1600


dB

24

24

24

24


dB

-27

-27

-27

-27

Minimum sensitivity

dBm

-18

-18

-27

-28

dBm

0

0

-9

-9

dB

1

1

1

2

dB

-27

-27

-27

-27

Minimum overload Receiver at Maximum optical path reference penalty point R Maximum reflectance of receiver, measured at R

68

2488320




Item

Unit

Application Code

Values V-16.2

U-16.2

Operating wavelength range

nm

1530-1565

1530-1565


dBm

13

15


dBm

10

12

ffs

ffs

dBm

ffs

ffs

-

x

x

Maximum spectral power density

mW/MHz

ffs

ffs


dB

ffs

ffs


dB

8.2

10

Minimum signal-to-noise ratio

dB

N/A

ffs

Maximum

dB

33

44

Minimum

dB

22

33

Maximum

ps/nm

2400

3200

Minimum

ps/nm

N/A

N/A

Total mean polarization mode dispersion (order 1)

ps

40

40


dB

24

24


dB

-27

-27

Minimum sensitivity

dBm

-25

-34

Minimum overload

dBm

-9

-18

Maximum optical path penalty

dB

2

2

Maximum reflectance of the receiver measured at R

dB

-27

-27

Spectral characteristics Transmitter at Maximum -20dB width reference point S Laser chirp

Attenuation range

Chromatic dispersion Optical Path between MPI-S and MPI-R

Receiver reference R

at point

69




Item

Unit

Values

Digital Signal Nominal Bit Rate

kbit/s

STM-64

Application code


nm

Maximum mean dBm launched power

9953280 4

I-64.2r

I-64.2

S-64.2a

S-64.2b

L-64.2b

V-64.2a

15301565

15301565

15301565

15301565

15301565

15301565

-1


dBm

-5

Maximum width

nm

Ffs

-

-1

-1

2

3

13

13

-5

-5

-1

10

10

ffs

ffs

ffs

ffs

ffs

ffs

ffs

ffs

ffs

ffs

ffs

mW/MHz

ffs

ffs

ffs

ffs

ffs

ffs


dB

30

30

30

30

ffs

ffs


dB

8.2

8.2

8.2

8.2

8.2

10

Minimum signal-to-noise

N/A

N/A

N/A

N/A

N/A

ffs

ffs

22

33

-20dB

Laser chirp Transmitter at reference Maximum spectral power density point S

Maximum attenuation range Minimum attenuation range

1

dB

2

7

7

11

11

dB

0

0

7

3

16

22

Maximum chromatic Optical path dispersion between MPI-S and Minimum chromatic dispersion MPI-R

ps/nm

40

500

800

800

1600

2400

ps/nm

N/A

N/A

N/A

N/A

ffs

ffs

Maximum passive dispersion compensation

ps/nm

N/A

N/A

N/A

N/A

N/A

ffs

Minimum passive dispersion compensation

ps/nm

N/A

N/A

N/A

N/A

N/A

ffs

70



Item

Unit

Values

Digital Signal Nominal Bit Rate

kbit/s

STM-64

Application code

4

I-64.2r

I-64.2

S-64.2a

S-64.2b

L-64.2b

V-64.2a

nm

15301565

15301565

15301565

15301565

15301565

15301565

Total mean polarization modulation dispersion (order 1)

ps

10

10

10

10

10

10


dB

24

24

24

24

24

24


dB

-27

-27

-27

-27

-27

-27


Optical path between MPI-S and MPI-R

9953280

Minimum sensitivity Minimum overload Receiver at Maximum optical path penalty reference point R Maximum reflectance of receiver, measured at R

dBm

3

-14

-14

-18

-14

-14

-25

dBm

-1

-1

-8

-1

-3

-9

dB

2

2

2

2

2

2

dB

-27

-27

-27

-27

-27

-27

Note: 1. N/A: not applicable. Such parameters are not required. 2. ffs: for further study. Currently such parameters are not specified by international standards. They are now given by the equipment supplier but subject to further specification of international standards. 3. L-64.2b optical interface uses self-phase modulation (SPM) for dispersion compensation. 4. V-64.2a optical interface uses the passive dispersion compensator (PDC) for dispersion compensation.

2. Mean launched power The mean launched power at reference point S is the average power of a pseudo-random data sequence coupled into the fiber by the transmitter. The parameter requirements for the optical interface types provided by the OptiX OSN 9500 are as shown in Table 19.

71



Table 19 Mean launched power

Optical level

interface

Optical interface type

Parameter requirement (dBm)

L-1.1

-5~0

L1.2

-5~0

L-4.1

-3 ~ +2

L-4.2

-3 ~ +2

S-16.1

-5 ~ 0

L-16.2

-2 ~ +3

V-16.2

+10 ~ +13

U-16.2

+12 ~ +15

I-64.2r

-5 ~ -1

I-64.2

-5 ~ -1

S-64.2a

-5 ~ -1

S-64.2b

-1 ~ +2

L-64.2b

+10 ~ +13

V-64.2a

+10 ~ +13

STM-1

STM-4

STM-16

STM-64

3. Extinction ratio (EX) Extinction ratio is the ratio of the average optical power level for a logical "1" to the average optical power level for a logical "0" under the worst reflection and full modulation condition. The parameter requirements for the optical interface types provided by the OptiX OSN 9500 are as shown in Table 20. Table 20 Extinction ratio (EX)

Optical interface level

Optical type

interface


L-1.1

>10

L-1.2

>10

L-4.1

>10

L-4.2

>10

STM-1

STM-4

72




Optical type

interface


S-16.1

>8.2

L-16.2

>8.2

V-16.2

>8.2

U-16.2

>10

I-64.2r

>8.2

I-64.2

>8.2

S-64.2a

>8.2

S-64.2b

>8.2

L-64.2b

>8.2

V64.2a

>10

STM-16

STM-64

4. Receiver sensitivity Receiver sensitivity is defined as the minimum acceptable value of average received power at point R to achieve a specified BER. The parameter requirements for the optical interface types provided by the OptiX OSN 9500 are as shown in Table 21. Table 21 Receiver sensitivity

Optical level

interface


Parameter (dBm)

L-1.1

< -34

L-1.2

< -34

L-4.1

< -28

L-4.2

< -28

S-16.1

< -18

S-16.2

< -18

L-16.1

< -27

L-16.2

< -28

V-16.2

< -25

U-16.2

< -34

rquirement

STM-1

STM-4

STM-16

73



Optical level

interface


Parameter (dBm)

I-64.2r

< -14

I-64.2

< -14

S-64.2a

< -18

S-64.2b

< -14

L-64.2b

< -14

V-64.2a

< -25

rquirement

STM-64

5. Receiver overload Receiver overload is the maximum acceptable value of the received average power at point R for a specified BER. The parameter requirements for the optical interface types provided by the OptiX OSN 9500 are as shown in Table 22. Table 22 Receiver overload



Parameter (dBm)

L-1.1

> -10

L-1.2

> -10

L-4.1

> -8

L-4.2

> -8

S-16.1

> 0

S-16.2

> 0

L-16.1

> -9

L-16.2

> -9

V-16.2

> -9

U-16.2

> -18

I-64.2r

> -1

I-64.2

> -1

S-64.2a

> -8

STM-1

STM-4

STM-16

STM-64

74

requirement




STM-64


Parameter (dBm)

S-64.2b

> -1

L-64.2b

> -3

V-64.2a

> -9

requirement

6. Permissible frequency deviation at input Under free-running conditions, the internal oscillator frequency offset of the regenerator should not greater than 20 ppm. The payload performance of the downstream SDH equipment is not guaranteed for an input frequency deviation with a magnitude greater than 20 ppm. The parameter requirements for optical input interfaces of the OptiX OSN 9500 are as shown in Table 23 Table 23 Permissible frequency deviation at input


Parameter requirement (ppm)

STM-1

±20

STM-4

±20

STM-16

±20

STM-64

±20

7. AIS rate tolerance at output In the case of signal loss at the input interface of the SDH equipment, AIS should be output to the downstream via the output interface. The tolerances between the AIS rate and the nominal rate at optical output interfaces of the OptiX OSN 9500 are as shown in Table 24. Table 24 Optical Output Interface AIS Rate Tolerance



STM-1

±20

STM-4

±20

STM-16

±20

STM-64

±20

75



2.2 Timing and Synchronization 1. Output jitter The output jitter value of the system, in the absence of input jitter. The parameter requirements are as shown in Table 25. Table 25 Output Jitter

Clock interface

Parameter requirement (UIpp)

1

0.05

2

0.05

2. SEC output frequency accuracy under free-running condition The output frequency accuracy of the OptiX OSN 9500 equipment clock under free-running condition are as shown in Table 26. Table 26 Clock output frequency

Clock Interface


1

±4.6

2

±4.6

2.3 Jitter Performance 1. Output Jitter at an STM-N interface In the absence of input jitter at the synchronization interface, the intrinsic jitter at optical STM-N output interfaces, as measured over a 60-second interval. The parameter requirements for STM-N jitter generation of the OptiX OSN 9500 are as shown in Table 27.

76



Table 27 STM-N jitter generation

Output jitter (UIpp) Optical Optical interface type interface level

B1 f1~f4 Parameter (dBm)

B2 f3~f4 Parameter requirement (dBm)

requirement

L1.1

0.50

0.10

L1.2

0.50

0.10

L-4.1

0.50

0.10

L-4.2

0.50

0.10

S-16.1

0.50

0.10

L-16.2

0.50

0.10

V-16.2

0.50

0.10

U-16.2

0.50

0.10

I-64.2

0.50

0.10

S-64.2a

0.50

0.10

S-64.2b

0.50

0.10

L-64.2b

0.50

0.10

V-64.2a

0.50

0.10

STM-1

STM-4

STM-16

STM-64

2. Input jitter/wander tolerance at an STM-N interface For STM-N optical interface the input jitter tolerance is the peak-to-peak amplitude of sinusoidal jitter in case of 1dB power penalty. The jitter and wander tolerances at the STM-N interfaces of the OptiX OSN 9500 are as shown in Table 28. Table 28 Jitter tolerance at STM-N interfaces

STM level

Jitter tolerance Jitter frequency f1 Parameter requirement (UI)

Jitter frequency f2 Parameter requirement (UI)

jitter frequency f3 Parameter requirement (UI)

Jitter frequency f4 Parameter requirement (UI)

STM-1

≥ 1.5

≥ 1.5

≥ 0.15

≥ 0.15

STM-4

≥ 1.5

≥ 1.5

≥ 0.15

≥ 0.15

STM-16

≥ 1.5

≥ 1.5

≥ 0.15

≥ 0.15

77



STM-64

≥ 1.5

≥ 1.5

≥ 0.15

≥ 0.15

Table 29 Measuring filter

STM level

f1(Hz)

f2(kHz)

f3(kHz)

f4(MHz)

STM-1

500

6.5

65

1.3

STM-4

1000

25

250

5

STM-16

5000

100

1000

20

STM-64

10000

400

4000

80

2.4 Electromagnetic Compatibility (EMC) In accordance with ETS300 386 series and ETS 300127 stipulated by the European Telecom Standard Institute (ETSI), the OptiX OSN 9500 comply with relevant EMC requirements. The EMC-related test parameters of the OptiX OSN 9500 are shown in Table 30. Table 30 EMC-related standards

78

Items

Standards

Conducted Emission

EN55022 Class A

Radiated Emission

EN55022 Class A

Electrostatic Discharge

IEC61000-4-2

Immunity To Radiated Electromagnetic Fields

IEC1000-4-3

Electrical Transient/Burst Immunity

IEC6100-4-4

Inject Current Immunity

IEC61000-4-6

Radiation Sensitivity

IEC61000-4-3

Surge

IEC61000-4-5

Voltage dips

IEC61000-4-29


Acronyms

Acronyms

Meaning

ADM

Add/Drop Multiplexer

AIS

Alarm Indication Signal

ATM

Asynchronous Transfer Transfer Mode

BER

Bit Error Ratio

BIOS

Basic input/output System

BML

Business Management Layer

CMI

Coded Mark Inversion

CMM

Capability Maturity Model

CPU

Central Processing Unit

DCC

Data Communication Channel

DCN

Data Communication Network

DNI

Dual Node Interconnection

DWDM

Dense Wavelength-Division Multiplexing

DXC

Digital Cross-connect Cross-connect

ECC

Embedded Control Channel

79



80

Acronyms

Meaning

EMC

Electromagnetic Compatibility

EML

Element Management Layer

ETSI

European Telecommunication Standards Institute

EX

extinction ratio

FEC

Forward Error Correction

FLASH

FLASH memory

FTP

File Transfer Protocol

GE

Giga bit Ethernet

GMPLS

Generalized Multiple Protocol Label Switch

HDLC

High Digital Link Control

IETF

Internet Engineering Task Force

ION

Intelligent Optical Network

ITU-T

International Telecommunication Standardization Sector

LAPS

Link Access Procedure-SDH protocol

LED

Light Emitting Diode

MLM

Multi-Longitudinal Mode

MPI-S

Main Path Interface at the Transmitter

MPI-R

Main Path Interface at the Receiver

MSP

Multiplex Section Protection

MST

Multi-Service Transmission Platform

MTIE

Maximum Time Interval Error

NML

Network Management Layer

OAM&P

Operation Administration, Maintenance & Provisioning

OCS

Optical Core Switch

ODF

Optical Distribution Frame

OIF

Optical Internetworking Forum

OSN

Optical switch Node

Union-Telecommunication Union-Telecommunic ation

OptiX OSN 9500 Intelligent Optical Switching System

Recommend Documents