OptiX OSN 1800 Product Overview.pdf

OptiX OSN 1800 Compact Multi-Service Edge Optical Transport Platform V100R003C01

Product Overview

Issue

01

Date

2011-07-05

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. 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 and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. 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 do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

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Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

iii

OptiX OSN 1800 Compact Multi-Service Edge Optical Transport Platform Product Overview

Contents

Contents 1 Introduction.................................................................................................................................1-1 2 Hardware Architecture..............................................................................................................2-1 3 Types and Scenarios of Service Access..................................................................................3-1 4 Product Features ......................................................................................................................... 4-1 5 Technical Specifications ...........................................................................................................5-1

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1 Introduction

1

Introduction

1.1 Positioning The OptiX OSN 1800 series are designed for metropolitan edge applications, including metropolitan convergence layer and access layer. They can be placed in the uplink direction of a broadband or mobile bearer equipment. After being processed in the metropolitan access layer network, the broadband, SDH, or Ethernet services are sent to the convergence node in the metropolitan transport network. In this way, the services are extended to the access layer, together with the use of existing OptiX WDM equipment. In a network with low capacity, the OptiX OSN 1800 series can be used at the metropolitan core layer. The OptiX OSN 1800 series use the dense wavelength division multiplexing (DWDM) and the coarse wavelength division multiplexing (CWDM). Wavelength grooming can be performed at the node that consists of the OptiX OSN 1800 series. The wavelength grooming features easy capacity expansion, flexible service access, high bandwidth utilization, and high reliability.

1.2 Benefits Access of Abundant Services: The OptiX OSN 1800 supports all types of services with the rate of 1.5 Mbit/s to 10 Gbit/s. OTN Encapsulation: All services are encapsulated as the OTN frames for unified transmission. EDFA: The OptiX OSN 1800 DWDM system uses advanced Erbium-doped fiber amplifier (EDFA) technology for long haul transmission with no regenerator. CWDM and DWDM Hybrid Network: In the initial network construction, the CWDM system is used to make the services be available quickly. With the increasing demand of broadband services and service traffic, the system can be smoothly upgraded to the DWDM system. Any ADM: The OptiX OSN 1800 series support the cross-connect function of services with rate lower than 1.25 Gbit/s. Layer 2 Switching: The OptiX OSN 1800 series support VLAN- and stack VLAN-based Layer 2 switching and Layer 2 convergence of GE services to 10GE services. ODUflex: By using this technology, users can flexibly configure ODUk based on the service capacity, therefore fully using the line bandwidth.

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1 Introduction


Single-Fiber Bi-Directional Transmission: The OptiX OSN 1800 series provide the single-fiber bidirectional transmission solution. That is, one fiber is shared for the receiving and transmitting of multi-wavelength optical signals. In this way, fiber resources are effectively utilized. Easy Installation: The equipment is an 1U height or 2U height box. It is light and compact. Therefore, a single person can solely install the equipment. Simplified Commissioning: There are indicators on boards, indicating their running status and optical power receiving status. This facilitates the on-site installation and commissioning. Temperature-hardened feature : In some special configuration scenarios, some boards can function properly at extremely low or high temperature.

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2 Hardware Architecture

Hardware Architecture

2.1 Structure The equipment is compact and easy for installation and maintenance. With air filter-free design, the equipment eliminates the need for on-site maintenance. There are two types of chassis: 1800 I and 1800 II. They are equipped with the hot standby power supplies, which can be either DC (-48 to -60 V) or AC (100 V to 240 V). The chassis can be installed in an ETSI cabinet (300 mm depth), a 19-inch cabinet (open rack) or an outdoor cabinet. Desk-top or wall-mounted installation is also possible.

Structure of the OptiX OSN 1800 I Chassis An OptiX OSN 1800 I chassis can be an ordinary chassis or a chassis integrated with a fiber management tray (FMT). An ordinary chassis can be a DC or AC power-supply chassis, but a chassis integrated with an FMT can be an DC power-supply chassis only. A DC power-supply chassis uses the PIU board and an AC power-supply chassis uses the APIU board. On the AC power-supply chassis, the APIU board occupies two service slots and the slot for housing the PIU board is installed with a filler panel. The PIU and APIU boards cannot be installed on the same chassis. Install the PIU board only on a DC power-supply chassis and install the APIU board only on an AC power-supply chassis.

Figure 2-1, Figure 2-2 andFigure 2-3 show the appearance of the I chassis. Figure 2-1 Oblique view of an ordinary OptiX OSN 1800 I chassis (DC power-supply chassis)

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Figure 2-2 Oblique view of an ordinary OptiX OSN 1800 I chassis (AC power-supply chassis)

Figure 2-3 Oblique view of OptiX OSN 1800 I chassis integrated with an FMT (DC power-supply chassis)

Structure of the OptiX OSN 1800 II Chassis The OptiX OSN 1800 II chassis provides eight slots for boards. Compared with the OptiX OSN 1800 I chassis, the OptiX OSN 1800 II chassis can access twice of the service volume accessed by the OptiX OSN 1800 II chassis. An OptiX OSN 1800 II chassis can be an ordinary chassis or a chassis integrated with a fiber management tray (FMT). Both an ordinary chassis and a chassis integrated with an FMT can be a DC or AC power-supply chassis. A DC power-supply chassis uses the PIU board and an AC power-supply chassis uses the APIU board. On the AC power-supply chassis, the APIU board occupies two service slots and the slots for housing the PIU boards are installed with two filler panels. The PIU and APIU boards cannot be installed on the same chassis. Install the PIU board only on a DC power-supply chassis and install the APIU board only on an AC power-supply chassis.

Figure 2-4, Figure 2-5 andFigure 2-6 show the appearance of the II chassis.

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Figure 2-4 Oblique view of an ordinary OptiX OSN 1800 II chassis (DC power-supply chassis)

Figure 2-5 Oblique view of an ordinary OptiX OSN 1800 II chassis (AC power-supply chassis)

Figure 2-6 Oblique view of OptiX OSN 1800 II chassis integrated with an FMT (AC and DC power-supply chassis)

Structure of the OptiX OSN 1800 I OADM frame The OptiX OSN 1800 I OADM frame, whose height is 1U, provides four slots for boards. The OADM frame can be used to house the optical add/drop multiplexer boards. As a result, the number of the accessed wavelengths are doubled and the networking with low cost is achieved. The SCC board on the OptiX OSN 1800 I or II chassis is connected to the CTL

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board in the OADM frame, thus achieving management of the OADM boards in the OADM frame. The CTL board is installed on the left of the OADM frame. The appearance of the OADM frame is similar with the I chassis. Figure 2-7 shows the appearance of the OptiX OSN 1800 OADM frame. Figure 2-7 Oblique view of the OptiX OSN 1800 OADM frame

2.2 Board Category For the OptiX OSN 1800, the following t ypes of boards are available: 

Optical transponder board



Optical multiplexer and demultiplexer board



Optical add and drop multiplexing board



System control and communication board



Optical protection board



Power supply access board



Heat dissipation board

Table 2-1 Boards for the OptiX OSN 1800

Board Category

Board Name

Board Description

Optical Transponder Unit

ELOM

Enhanced 8 x Multi-rate Ports Wavelength Conversion Board

LDE

Double Port EPON/GE Access Wavelength Conversion Board

LDGF

Double GE Services & Double FE Services Wavelength Conversion Board with FEC

LDGF2(TNF1LD GF2/TNF2LDGF 2)

Double 2 x GE Wavelength Conversion Board

LEM18

16 x GE + 2 x 10GE LAN + 2 x OTU2 Ethernet Switch board

LOE

8 Port EPON/GE Access Wavelength Conversion Board

LQG

4 x GE Wavelength Conversion Board

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Board Category


Board Name

Board Description

LQM(TNF1LQM/ TNF2LQM)

4 x Multi-rate Ports Wavelength Conversion Board

LQM2(TNF1LQ M2/TNF2LQM2)

Double 4 x Multi-rate Ports Wavelength Conversion Board

LQPL

OLT Side 4 Port GPON/STM-16/OC-48/OTU1 Access Wavelength Conversion Board

LQPU

ONU Side 4 Port GPON/STM-16/OC-48/OTU1 Access Wavelength Conversion Board

LSPL

OLT Side Single Port GPON Access Wavelength Conversion Board

LSPR

Single Port GPON Extension REG Board

LSPU

ONU Side Single Port GPON Access Wavelength Conversion Board

LSX(TNF1LSX/T NF2LSX)

10 Gbit/s Wavelength Conversion Board

LDX

2-channel 10 Gbit/s Wavelength Conversion Board

LWX2

Double Arbitrary Bit Rate Wavelength Conversion Board

TSP

21-channel E1/T1 and 2-channel STM-1 Service Convergence and Wavelength Conversion Board

Optical Multiplexer and Demultiplexer Unit

FIU

Fiber Interface Unit

X40

40-Channel Multiplexing or Demultiplexing Board

Optical Add and Drop Multiplexing Unit

DMD1

Bidirectional Single Channel Optical Add/drop Multiplexing Board

DMD1S

Bidirectional Single Channel Optical Add/drop Multiplexing Board with OSC

DMD2

Bidirectional Double Channel Optical Add/drop Multiplexing Board

DMD2S

Bidirectional Double Channel Optical Add/drop Multiplexing Board with OSC

MD8

8 Channel Multiplexing and Demultiplexing Board

MD8S

8 Channel Multiplexing and Demultiplexing Board with OSC

MR1

Single Channel Optical Add/Drop Multiplexing Board

MR1S

Single Channel Optical Add/drop Multiplexing Board with OSC

MR2

Double Channel Optical Add/drop Multiplexing Board

MR2S

Double Channel Optical Add/drop Multiplexing Board with OSC

MR4

Four Channel Optical Add/drop Multiplexing Board

MR4S

Four Channel Optical Add/drop Multiplexing Board with OSC

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Board Category

Board Name

Board Description

MR8

Eight Channel Optical Add/drop Multiplexing Board

SBM1

Single Fiber Bidirectional Single Channel Optical Add/drop Multiplexing Configuration Board

SBM2

Single Fiber Bidirectional Double Channel Optical Add/drop Multiplexing Configuration Board

SBM4

Single Fiber Bidirectional Four Channel Optical Add/drop Multiplexing Configuration Board

SBM8

Single Fiber Bidirectional Eight C hannel Optical Add/drop Multiplexing Configuration Board

Optical Amplifier Unit

OPU

Optical Preamplifier Unit

OBU

Optical Booster Board

System Control and communication Unit

CTL

OADM Control Board

SCC

System Control & Communication Board with OSC

Optical Protection Unit

OLP

Optical Line Protection Board

SCS

Sync Optical Channel Separator Board

Power Supply Access Unit

APIU

AC Power Interface Unit

PIU

DC Power Board

Heat Dissipation Board

FAN

Fan Board

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3 Types and Scenarios of Service Access

Types and Scenarios of Service Access

3.1 Types of Service Access The product can access almost all types of services that are rated from 1.5 Mbit/s to 10 Gbit/s. The OptiX OSN 1800 series supports the following types of services: SDH service (STM-1/STM-4/STM-16/STM-64), PDH service (E1/T1), Ethernet service (FE/GE/10GE WAN/10GE LAN), OTN service (OTU1/OTU2/OTU2e), CPRI service (CPRI option1/CPRI option2/CPRI option3/ CPRI option6), SAN service (FC100/FC200/FC400/FC800/FC1200/ FICON/ FICON Express/ ESCON/ InfiniBand 2.5G/ InfiniBand 5G), PON service, video services (DVB-ASI/SDI/HD-SDI/3G-SDI). The OptiX OSN 1800 series support functions such as 4xAny service convergence, 8xAny service convergence, 1xAny service conversion, 2xGE or 16xGE service convergence, 10GE service convergence, and PON service transparent transmission and distance extension.

3.2 Scenarios of Service Access The product provides various scenarios of service access, to meet the service requirements on the access layer network.

BBU Hotel For a distributed base station, the base band unit (BBU) and remote radio unit (RRU) are separate. In the scenario of BBU hotel, BBUs for such distributed base stations are placed together. The RRUs are connected to the BBUs through CPRI interfaces over fibers. The advantages of such a scenario are as follows: 

Low costs and easy operation and maintenance (O&M): A smaller number of optical fibers and colored optical modules are used and BBUs are managed and maintained in centralized mode.



Good performance: BBUs are placed together. In this case, the hold-off time for service switchover among base stations is shortened.



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High reliability: Protection can be implemented at the OTN layer so that services are protected against link faults.


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3 Types and Scenarios of Ser vice Access


OLT Hotel The centralized placement of OLTs gives benefits in reduced fiber consumption and enlarged coverage. Furthermore, transmission reliability is improved thanks to the OTN layer protection.

Users

Users

… …

OptiX OSN 1800

Users

Centralized management and maitenance of OLTs in the telecommunications room

Users

55 km (GPON) 35 km (EPON)

Mobile Carrier Network The 2G backhaul requires E1 service between BTS and BSC, while 3G needs FE or GE between Node B and RNC. The OptiX OSN 1800 series provide integral carrier solution for evolution from 2G to 3G network.

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OptiX OSN 1800 Compact Multi-Service Edge Optical Transport Platform Product Overview Node B


BTS STM-1 granularity accesses to the convergence layer

FE/GE

E1

155M

E1 OptiX OSN 1800 155M/622M

BTS

BSC

MSTP 2.5G

FE/GE FE/GE

Node B E1

FE/GE RNC

BTS

Node B

OptiX OSN 1800

MSTP equipment

Power cable

Network cable

E1 Private Line Transmission The client-side optical interfaces on the E1 access boards of the OptiX OSN 1800 series connect to the upper-layer MSTP equipment. The equipment is interconnected with two optical interfaces, to achieve SDH SNCP protection. The scenario is applicable to: 

Convergence of the E1 service of all branches.



Enterprise internal data, video, and voice services that accessed through FE and E1 interfaces.



Data and voice between enterprise branches and headquarters share same E1 circuits .

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Headquarters of company XX

Switch PBX

SDH

N x 155M

OptiX OSN 1800 155M/622M ring network

N*E1 XX module office

XX module office

PDH

N*E1 XX module office

N*E1

PDH PDH

12M ……

Branch XX

12M Branch XX

……

12M Branch XX

PBX

PBX PBX

FE

E1

FE FE

Fiber FE service flow

E1

E1

Power cable

Network cable E1 service flow

Upstream GE Service from the Urban DSLAM/MASN The OptiX OSN 1800 series can be used to connect the DSLAM directly to the upstream WDM.

3-4



Multiple GE services can be multiplexed into one wavelength by using the OTN technology, and multiple wavelengths can be converged into one fiber by using the WDM technology. This improves the fiber utilization to a great extent and thus saves fiber resources.



The 4xAny service board (LQM) and 8xAny service board (LQM2) support the function to converge 2xGE services plus 2xSTM-1 services to one 2.5 Gbit/s wavelength. In this manner, one single board can carry both the upstream services on the legacy ATM-DSLAM and the newish IP-DSLAM.



The inband overhead (ESC) of OTN can be used to transmit the NM information through the local SDH network to the U2000. No DCN is required for remote nodes.


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Central telecommunications equipment room OLT

BRAS

SR

RNC/BSC 2-60km+

OptiX OSN 1800

Curb

300-500m DSLAM

Building DSLAM

ADSL2+

LAN

FTTx

10/100Base-T

VDSL2

GeTTC

GeTTB

Fiber

Network cable

< 100m

FTTx

Mobile broadband

SAN FE/ private GE line

Home/ Office

GeTTO

Twisted pair cable

Wide Broadband Coverage in Suburb and Remote Areas To address the broadband service requirements in the suburb and remote areas, the CWDM equipment is widely used to carry the broadband traffic at the edge of the MAN. The OptiX OSN 1800 series has the following advantages: 

Offers high capacity for carrying broadband traffic.



Enables up to 100-km transmission of GE services, satisfying the long distance transmission requirement in remote areas, thanks to ITU-T G.709-compliant FEC.



Supports ITU-T G.709-compliant GCC management and communicates with the central node through the ESC in the remote areas, cost-optimized NMS solution.



Interoperable with Huawei SDH and WDM equipment and thus eliminate the need for DCN in remote areas.

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Central node A (country) Central node B (town 1) Central node M (town n) OptiX OSN 1800 Central node C (town 2) Central node D (town 3)

Central node E (town 4) GE Gigabit Ethernet switch

MASAN VIP customers

Government OLT

Net bar

PON Service Distance Extension The OptiX OSN 1800 series provide Ethernet passive optical network (EPON) and Gigabit passive optical network (GPON) service interfaces, to meet the demands on fiber quantity and capacity. of PON On the other hand, as WDM can transport longer, the ONUs can be deployed further from the OLT and hence enlarged PON coverage. The LOS/LOF alarm detection is also provided for easy fault locating in the network. 

In terms of end-to-end GPON service OTN distance extension, the OptiX OSN 1800 series realize a transmission distance of 50 km in a single span.



In terms of end-to-end EPON service OTN distance extension, the OptiX OSN 1800 series realize a transmission distance of 35 km in a single span.

Figure 3-1 shows the application scenarios of the PON service distance extension scheme provided by the OptiX OSN 1800 series. In the scheme, specific boards are used to transmit ONU and OLT signals. Upstream and downstream PON service signals are transparently transmitted and end-to-end transmission of services is achieved in the network.

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Figure 3-1 PON service distance extension

Large-Granularity Private Line Service OptiX OSN 1800 series ensures quick provision and delivery of the private line service. The OptiX OSN 1800 series has the following features: 

Mainly carries large-granularity private line services, such as the GE, ODU0, 10GE LAN, 10GE WAN, STM-64/16/4/1, FC100, FC200, FICON, FICO N Express, ESCON, λ (leased wavelength), OTU1 and OTU2/OTU2e services.



Also carries small-granularity and low-rate private line services (such as FE) and thus carries private line services of multiple granularities on a single network. This reduces the number of equipment resources and the maintenance cost.



Has a compact design and normalized configuration of Any service ports, supports quick deployment.



Realizes the end-to-end solution by working with Huawei WDM equipment and thus reduces back-to-back OTMs. Thus, it reduces cost but has high reliability.

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Figure 3-2 Large-granularity private line service Office building

Office building

Core DWDM/OTN Finance

Finance

OptiX OSN 1800

OptiX OSN 1800 Government

Government …

…

Enterprise

GE FC ESCON STM-N/ OC-N

GE FC ESCON STM-N/ OC-N

Enterprise

ODU0-Based Flexible Grooming and Management of GE Services The ODU0 encapsulation in OptiX OSN 1800 series improves transmission efficiency for services at a rate lower than 2.5 Gbit/s, and achieving: 

Arbitrary add and drop of the ODU0-encapsulated GE services at another OptiX OSN 8800 T16 station by interconnecting the OptiX OSN 1800 with an OptiX OSN 8800 T16 station.



Arbitrary add and drop of the GE services at an OptiX OSN 8800 station by interconnecting the OptiX OSN 1800 with an OptiX OSN 8800 T16 station.

Figure 3-3 ODU0-based flexible grooming and management of the GE services OptiX OSN 1800

GE-3

OptiX OSN 1800

GE-2 OptiX OSN 8800

GE-1

GE-3

GE-2 OptiX OSN 1800

ODU0

GE-1 GE Service Flow

OptiX OSN 6800/ OptiX OSN 8800 T16

Mobile Broadband Backhaul For base stations that a small number of FE/GE services emerge, the FE/GE services can be directly accessed to the OptiX OSN 1800 series and no extra SDH/PTN equipment is required. In this case, the FE/GE services skip the central convergence nodes and travel directly from the edge node to the MAN node.

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Figure 3-4 GE services from base stations carried over mobile broadband

FE/GE Service Base station FE/GE Service

OptiX OSN 1800

Base station

FE/GE Service Base station

IPTV Network The IPTV network is constructed in the ring network. A central node sends services to several edge nodes at the same time. The services can be wavelength services or sub-wavelength services. In this way, bidirectional transmission of data services is realized. The IPTV network has the Drop and Continue feature. In the IPTV network, the uplink service traffic is low. The large service traffic in the downlink, such as TV program signals, is duplicated at the program source node and then transmitted through special GE channels in the two directions of the ring network. At each program receiving node, the service traffic is downloaded, and passed through to other program receiving nodes in the downlink. In this way, the broadcast or multicast function of TV program signals is realized. Figure 3-5 IPTV network and service plan

Program source node

Program receive node


OptiX OSN 1800


Program receive node Program receive node


Protection service of each other

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Full-Service Operation As rich network resources are available, a station can be shared on the access layer. The WDM equipment provides a large channel for full services and thus enables fast service provision. In addition, the WDM equipment features long-distance service transmission, which helps reduce the equipment room, equipment, and interfaces at the edges of the MAN. In this manner, the TCO is reduced to a great extent. 

Accesses services at a rate ranging from 1.5 Mbit/s to 10 Gbit/s, and transmits both the large-granularity broadband services and small-granularity services. That is, the OptiX OSN 1800 series can access full services and effectively lower the equipment cost.



Enables long-haul and large-capacity transmission without involving any convergence node. This is the simplified networking characterized by larger capacity nodes and fewer sites. In this networking mode, services are accessed at the endpoint and processed at the central node. As a result, the number of equipment resources, interfaces, and equipment rooms is decreased.



Supports ITU-T G.709-compliant OTN interfaces. This enables easy interconnection of the OptiX OSN 1800 series with other equipment and facilitates the equipment management. In addition, the OptiX OSN 1800 series can work with Huawei WDM/OTN equipment to form an end-to-end network.

Figure 3-6 Full-service operation Centralized configuration and management of service equipment OLT BRAS

SR RNC/BSC

Metro core and backbone

OptiX OSN 1800

Metro edge

Access of all services on the same site

1310 nm

GE

MSTP/PTN

SAN

Fiber

3-10

LAN/DSL

FTTx

Network cable

2G,3G,LTE Access network

Twisted pair cable


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4 Product Features

4

Product Features

4.1 Network Level Protection The product provides various network level protection schemes to enhance the system reliability. Table 4-1 Service protection mechanism and application scenarios of the OptiX OSN 1800 series (WDM protection)

Protection Type

Application Scenario

Optical line protection



It protects the entire fiber line.



It uses the dual fed selective receiving function of the OLP board and the diverse routing to provide protection for line fibers between the adjacent stations.

Intra-board wavelength protection



It protects a single OTU board with the dual fed selective receiving function and protects a single OTU board with only one group of WDM-side transmit and receive optical ports. It also protects a single OTU board with the single fed single receiving function with the OLP board that provides the dual fed selective receiving function.



Client 1+1 protection

It uses the dual fed selective receiving function of a single OTU board and the diverse routing to provide protection for a service by adopting two different wavelengths.



It protects the OTU board.



It is implemented by the SCS board or the OLP board.



It protects a single client-side service or a single channel.

SW SNCP protection

It protects the OTU board with convergence and cross-connection function that can configure cross-connection and protection for individual client-side services.

ODUk SNCP protection

It uses the dual fed and selective receiving function of the electrical layer grooming to protect the OCh fibers. The cross-connect granularity is ODU0 signals, ODU1 signals, ODUflex signals and ODU2 signals.

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4 Product Features

Table 4-2 Service protection mechanism and application scenarios of the OptiX OSN 1800 series (SDH protection)

Protection Type


Sub-Network Connection Protection (SNCP)

Utilizes the dual fed and selective receiving function of the cross-connections at the electrical layer. Services are dual transmitted at the source and selectively received at the sink.

Table 4-3 Service protection mechanism and application scenarios of the OptiX OSN 1800 series (Ethernet protection)

Protection Type


ERPS

This protection type is based on the traditional Ethernet mechanism and uses the ring network automatic protection switching (R-APS) protocol to achieve quick protection switching in the Ethernet ring network.

LAG

In this protection mode, multiple links between two nodes are bundled together to get higher bandwidth and improve link reliability.

MSTP

In the case of the Ethernet user network where loops exist, the MSTP generates the tree topology according to VLAN IDs of the Ethernet packets. Thus, the broadcast storm is avoided and the network traffic is balanced according to the VLAN IDs of the Ethernet packets.

Overview The OptiX OSN 1800 series provide the status monitoring function of the protection mechanism and the detecting function of the protection switching, reliability and resource availability so as to enhance the network reliability. There are five protection switching commands, clear switching, locked switching, forced switching, automatic switching and manual switching, arranged by priority from high to low. Automatic switching is triggered by the system upon internal switching conditions. Locked switching, forced switching and manual switching are externally issued on the U2000 as means to test and maintain the system. A clear switching command can be issued on the U2000 to clear the preceding three external switching commands.

ODUk SNCP Protection TNF2ELOM, TNF2LQM, TNF2LQM2, TNF2LSX, and TNF1LDX board support the ODUk SNCP protection. The ODUk SNCP provides protection for topologies such as ring with chain, tangent rings, and intersecting rings. This ensures high flexibility in application. An ELOM board is used as an example to illustrate the working principle of ODUk SNCP protection.

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4 Product Features

ODUk SNCP Protection(Normal) Working Channel

Source End RX/TX ODUk Crossconnect

ELOM 1

IN1/OUT1

IN1/OUT1

IN2/OUT2

IN2/OUT2

Sink End RX/TX ODUk Crossconnect

Protection Channel

ELOM 2

ODUk SNCP Protection(Switch) Working Channel

Source End RX/TX ODUk Crossconnect

ELOM 1

IN1/OUT1

IN1/OUT1

IN2/OUT2

IN2/OUT2

Protection Channel

Sink End RX/TX ODUk Crossconnect

ELOM 2

When the working channel fails, the SNCP switching is implemented as follows: 

Before the switching, the source end (ELOM1 board) sends the service signal to the sink end (ELOM2 board) through both the working channel and protection channel.



When detecting that the signal of the working channel fails, the ELOM2 board reports the channel signal failure event to the system control board.



The system control board of the sink end checks and ensures that the signal of the working channel fails but the signal of the protection channel is normal. Then, the ELOM2 board completes the cross-connection between the protection channel and the service sink. In this manner, the ELOM2 board receives the service from the protection channel.

4.2 Features of WDM Transmission Technology 4.2.1 OTN Technology The product uses the OTN monitoring architecture. The OptiX OSN 1800 series fully support the OTN technologies. Key technologies are as follows: 



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Client service mapping: For customer services whose mapping process has been defined by Recommendation G.709, the OptiX OSN 1800 series adopt mapping process that is completely compliant with the Recommendation. These services include SDH services and Ethernet services. The virtual concatenation technology can be used to map 10GE services into ODU1-Xv. When the service rate is less than the ODU1, the ODU1 is equally divided into 16 timeslots to carry the services. Services at different rates are allocated with different amount of time slots. For example, one time slot carries STM-1 service; four time slots carry STM-4 service; six time slots carry FC100 service. The division of OTN payload domain improves the utilization of ODU channels. Channel mapping: The OptiX OSN 1800 series support the mapping of ANY services, OPU1, ODU0, ODU1 and OTU1 layer by layer in the upstream and downstream directions.


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4 Product Features 

OAM: The OptiX OSN 1800 series fully support all kinds of administrative overhead defined by Recommendation G.709. It utilizes GCC byte for ESC management. GCC0, GCC1, and GCC2 can be chosen to transmit the management information. SM, PM performance monitoring and reporting is supported. It supports ODUk PM signals processing. FEC and correction result reporting is supported.

With OTN-related technologies, the OptiX OSN 1800 series have technical advantages in the following aspects: 

It adopts OPUk container to achieve real transparent adaptation and transmission of any client services without changing any pa yload or overhead. It also provides effective management and service quality monitoring. In addition, it can be compatible with possible new services in the future.



It adopts asynchronous mapping and multiplexing so that networkwide synchronization is no longer needed. This eliminates the limitation on synchronization and simplifies the system design.



With the asynchronous mapping and multiplexing of ODU0 channel, the sub-rate services can be flexibly groomed between different OCh channels and the client-side ports. This meets the need for both high utilization of wavelength bandwidth and flexible end-to-end grooming.



With the standard FEC by the OTN, it achieves a maximum of 6.2 dB (BER=10E-15) coding gain. The OSNR tolerance of the optical channel is decreased in this way. In addition, the distance between electrical regenerators are extended with less system nodes. This can increase the budgetary optical power gain of the OptiX OSN 1800.

4.2.2 Link Pass Through When the overhead byte supporting the link state pass through (LPT) protocol is added to the frame format of the WDM side signals, the system can monitor the running status of the network access point or the service network. Normally, the OTU board at the upstream station transmits the LPT protocol information that indicates normal WDM side transmission line to the OTU board at the downstream station. When the status of the upstream WDM side transmission line changes, for example, a fault occurs or a fault is removed, the OTU board at the upstream station transmits the LPT packet that indicates network status change to the OTU board at the downstream station. When the downstream station knows that the status of the transmission line changes, it enables or disables the standby transmission line to ensure that services on the transmission line are available. LPT is mainly used to implement two functions: one is monitoring of service network operation status, and the other is monitoring of access point operation status.

4.3 Optical Power Management The OptiX OSN 1800 product supports the automatic gain control (AGC) function.

4.3.1 Introduction to AGC The automatic gain control (AGC) function locks channel gain regardless of the number of optical wavelengths transported in a fiber. Adding or dropping one or more channels or optical signal fluctuation does not affect the signal gain of other channels.

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The Erbium-doped fiber amplifier (EDFA) adopted by the system works in the mode of gain locking. In this mode, the output optical power of the amplifier changes with the input optical power and the gain is maintained. That is, when the number of wavelengths changes, the power adjustment time is within 1 ms in the gain locking mode so that the optical power of other channels remains unaffected and the burst bit error can be avoided during the process of adding or dropping wavelengths. The EDFA adopted by the system works in the mode of gain locking. The amplifier is embedded with the forward and backward feedback control loops, which dynamically respond to the change of input optical power. When the change is less than 1 dB, the backward feedback control loop is enabled to control the power precisely. When the change is more than 1dB, the forward feedback control loop is enabled to adjust the power rapidly. By virtue of the gain locking mode, the system can transmit a single wavelength of si gnals and also add or drop wavelengths without affecting services. Due to the embedded suppression mechanism of the amplifier, if the services suddenly change or the amplifier degrades over a certain hop, the services over other hops are not affected. In the extreme situation where only one wavelength is normal and other wavelengths disappear in the system, the AGC function can ensure that the services over this wavelength are not affected. A 16-wavelength system is used as an example to illustrate the AGC function. 

In the 16-wavelength system, the transmitting optical power of each channel is +5 dB. When 15 of the 16 wavelengths disappear, the remaining one is not affected.

The gain locking mode is more effective than the power locking mode in terms of power efficiency, because the pump optical power is always exported according to the utmost capacity of the system, regardless of the actual number of working wavelengths. When the number of wavelengths is changing, AGC would ensure the optical power of remain channels is not affected. It helps to avoid an outburst of bit errors during adding or dropping channels from the main stream.

4.4 Physical Clock OptiX OSN 1800 supports SDH clock synchronization and Synchronous Ethernet Clock.

4.4.1 SDH Clock Synchronization SDH clock synchronization is a traditional clock synchronization technology, which ensures transmission quality of SDH services. The OptiX OSN 1800 extracts the timing signals b y the following methods: 

Extracts 2M timing signals from the external clock port of an NE



Timing signals extracted from optical signals that the TSP board receives

The OptiX OSN 1800 supports input and output of one 120-ohm external clock source. The OptiX OSN 1800 supports three clock working modes, that is, the tracing, holdover, and free-run modes. The timing signals from optical signals that the line board receives and 2 Mbit/s timing signals also process and transfer synchronization status messages (SSMs). The SDH clock has the following features: 

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The synchronous physical clock can be easily achieved and is highly reliable.


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4 Product Features 

The synchronous physical clock adopts the SSM information to indicate clock quality and exclusive SDH overheads to transfer the SSM.

4.4.2 Synchronous Ethernet Clock The synchronous Ethernet clock is a technology of frequency synchronization over the physical layer, which is similar to the SDH clock. The LEM18 board for the OptiX OSN 1800 supports synchronization Ethernet clock. The LEM18 board can extract clock information such as clock frequency and SSM information at the GE, 10GE, and OTU2 ports. The synchronization Ethernet clock has the following features: 

No external clock source is supported.



The physical-layer clock can be directly extracted at ports and the QoS of the clock satisfies the requirement.



The physical-layer clock adopts the SSM information to indicate clock quality and exclusive Ethernet packets or OTN overheads to transfer the SSM information.



To provide the synchronous Ethernet clock, each NE that the synchronization information traverses must support the synchronous Ethernet technology.

4.4.3 PTP Clock (IEEE 1588 v2) A Precision Time Protocol (PTP) clock complies with the IEEE 1588 v2 protocol and can realize synchronization of frequency and time. IEEE 1588 v2 is a synchronization protocol, which realizes frequency and time synchronization based on the timestamp generated during the exchange of protocol packets. It provides the nanosecond accuracy to meet the requirements of 3G base stations. To achieve PTP clock synchronization, all NEs on the clock link should support the IEEE 1588 v2 protocol.

BMC Algorithm For the PTP clock, the best master clock (BMC) algorithm is adopted to select the clock source. The best master clock (BMC) algorithm compares data describing two or more clocks to determine which data describes the better clock, and selects the better clock as the clock source. The BMC algorithm includes the following algorithms: 

Data set comparison algorithm: The NE determines which of the clocks is better, and selects the better clock as the clock source. If an NE receives two or more channels of clock signals from the same grandmaster clock (GMC), the NE selects one channel of the clock signals that traverses the least number of nodes as the clock source.



State decision algorithm: The state decision algorithm determines the next state of the port based on the results of the data set comparison algorithm.

Clock Architecture There are three models for the IEEE 1588 v2 clock architecture.

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

OC (Ordinary Clock): A clock that has a single IEEE 1588 v2 port and the clock needs to be restored. It may serve as a source of time (master clock), or may synchronize to another clock (slave clock).



BC (Boundary Clock): A clock that has multiple IEEE 1588 v2 ports and the clock needs to be restored. It may serve as the source of time, (master clock), and may synchronize to another clock (slave clock).



TC (Transparent Clock): A device that measures the time taken for a PTP event message to transit the device and provides this information to clocks receiving this PTP event message. That is, the clock device functions as an intermediate clock device to transparently transmit the clock and process the delay, but does not restore the clock. It can effectively deal with the accumulated error effects resulting from the master and slave hierarchical architecture. In this manner, the TC ensures that the clock/time synchronization precision meets the application requirement. The TC is classified into peer-to-peer (P2P) TC and end-to-end (E2E) TC according to the delay processing mechanism. −

P2P TC: When the PTP packets are transmitted to the P2P TC, the P2P TC corrects both the residence time of the PTP packets and the transmission delay of the link connected to the receive port. The P2P TC is mainly used in the MESH networking.

−

E2E TC: When the PTP packets are transmitted to the E2E TC, the E2E TC corrects only the residence time of the PTP packets. The E2E delay computation mechanism between the master and slave clocks is adopted. The intermediate nodes do not process the transmission delay but transparently transmit the PTP packets. The E2E TC is mainly used in the chain networking.

OptiX OSN 1800 can support the OC, BC, TC, TC+OC, BC + physical-layer clock, and TC+BC at present.

4.5 Data Characteristics The OptiX OSN 1800 supports the Ethernet features.

4.5.1 Service The OptiX OSN 1800 supports Ethernet services refer to Table 4-4. Table 4-4 Types of Ethernet services

Service Type

Definition

Features

EPL services

Ethernet Private Line services



EPL services are transparently transmitted in a point-to-point manner. The physical links carrying EPL services are independent of each other and EPL services do not share bandwidth among themselves.



EPL services are applicable to users working in banks or stock exchange centers, who require high security and QoS.



EVPL services are converged from multiple points to one point. EVPL services share bandwidth and are identified and separated by tags such as VLAN IDs.



EVPL services are applicable to enterprise users, who require high QoS.

EVPL services

Ethernet Virtual Private Line services

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Service Type

Definition

Features

EPLAN services

Ethernet private LAN services



EPLAN services are transmitted in a multipoint-to-multipoint manner. They do not share bandwidth among themselves.



The physical links carrying EPLAN services are independent of each other and EPLAN services enable interconnection among LANs set up for enterprise users.



EPLAN services are transmitted in a multipoint-to-multipoint manner. They share bandwidth among themselves.



EVPLAN services identify data of different users using the VLAN or QinQ mechanism and enable interconnection among LANs set up for enterprise users.

EVPLAN services

Ethernet virtual private LAN services

4.5.2 QoS Quality of service (QoS) defines the expected class of service, in terms of the bandwidth, delay, delay variation, and packet loss ratio, which should be guaranteed under all circumstances in a communication network. This ensures that the request and response of an application meets the expected class of service. On a traditional IP network, all packets are treated in the same way. Every router adopts the first in first out (FIFO) policy to process packets, and makes its best effort to transmit packets to the destination; however, the packet transmission performances such as the reliability and delay are not ensured. To support voice, video, and data services that have different service requirements, a network must be able to differentiate communication types and thus provide relevant service. In the case of the transmission where prioritized queues are used to support QoS, sets one of the egress queues as a strict-priority (SP) queue, so that packets in this queue are always groomed with the highest priority. This setting meets the requirements of key service packets. The other egress queues adopt the weighted round robin (WRR) grooming algorithm so that packets in each queue can obtain a certain period of service. The Ethernet service processing boards provide the QoS function. By providing dedicated bandwidths, lowering the packet loss ratio, and reducing the packet transmission delay and delay jitter, the QoS function helps provide different classes of service for different customers. The QoS function complies with the following standards: IETF RFC2697, RFC2698, RFC2309, RFC2597, RFC2598, and IEEE802.1p.

4.5.3 Protection The OptiX OSN 1800 provides layered protection for Ethernet services. For details refer to Table 4-3.

4.5.4 Administration and Maintenance The OptiX OSN 1800 provides equipment-level and network-level administration and maintenance, which can be implemented by using the U2000. The following mainly describes the administration and maintenance schemes at the equipment level.

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ETH-OAM The Ethernet operation, administration, and maintenance (ETH-OAM) function improves the Ethernet Layer 2 maintenance method and provides powerful maintenance function for service continuity check, deployment commissioning, and network troubleshooting. The Ethernet processing board of the OptiX OSN 1800 can implement the ETH-OAM function, which complies with IEEE 802.1ag, and ITU-T Y.1731 standards. The combination of the operation, administration, and maintenance provides a complete Ethernet OAM solution, thus realizing automatic fault discovery and fault location. The ETH-OAM function compliant with IEEE 802.1ag and ITU-T Y.1731 standards is implemented in the following ways: 

Link tracing (LT) test: used to locate faults at the faulty point.



Loopback (LB) test: used to test the bidirectional connectivity.



Connectivity check (CC) test: used to test the unidirectional connectivity.

For details about the ETH-OAM function, see the Feature Description.

RMON The remote monitoring (RMON) function can monitor the transport network data of different network segments. The RMON function defines a series of statistical forms and functions to exchange data between the control station and detection station that comply with the RMON standard. In this manner, the RMON function is able to manage the Ethernet port. The RMON function provides flexible detection modes and control mechanisms to meet the requirements of different types of networks. In addition, the RMON function provides error diagnosis, network planning, and reception of performance event information on a networkwide basis.

Flow Control Flow control on Ethernet services is implemented by controlling the transmission rate of the opposite equipment using Pause frames based on IEEE 802.3x standards. For example, the OptiX OSN 1800 is configured with the bandwidth of 50 Mbit/s and the opposite switch transmits packets to the OptiX OSN 1800 at the rate of 100 Mbit/s. In this case, packets will be discarded because of insufficient bandwidth if flow control is not configured. If flow control is configured, the OptiX OSN 1800 will send Pause frames to the opposite switch after detecting insufficient bandwidth. Then the switch will reduce the transmission rate to 50 Mbit/s to ensure normal packet transmission.

4.6 Features of Commissioning and Configuration 4.6.1 PRBS Error Detection Function Some OTUs of the system provide the pseudo random bit sequence (PRBS) error detection function. By starting or stopping on the NM a PRBS bit error test at the client-side interface of the OTU, the bit error test of the transmission link can be performed without attaching an extra meter to the equipment during equipment deployment.

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This function can be realized by using the combination of the PRBS signal generator and PRBS signal monitor. The PRBS signal generator of the OTU that supports PRBS bit error detection generates and transmits PRBS signals. The PRBS signal monitor monitors the PRBS codes transmitted from the PRBS signal generator and the PRBS codes looped back from the opposite station. In other words, the PRBS s ignal monitor compares the transmitted signals with the looped-back signals and determines whether the equipment or transmission line is normal.

4.6.2 Service Package Configuration Service package makes the configuration operation easily and fast. When an NE of the OptiX OSN 1800 series is powered on for the first time, b y default, the service initially configured on the board. On site, the hardware installation personnel only need to commission the optical power to the normal value. After the equipment is running normally, according to the application scenario of the NE, the user can remotely issue commands on the NM to configure the service on the board of the NE. In addition, the NM software for the product provides the quick configuration wizard with which the NE time synchronization and performance monitoring can be configured. In the case of the typical configuration, the quick configuration wizard enables you to complete the one-touch service configuration simply by selecting the service package. The LQM, LQM2 and LWX2 boards of the OptiX OSN 1800 series support the following one-touch service application scenarios: 

GE transparent transmission



GE/STM-1 hybrid transmission

4.6.3 End-to-End Service Configuration The system provides the function of managing end-to-end OTN service configurations, which helps simplify the configuration process. This function helps shorten the network deployment time and implement automatic management of a network. When configuring an end-to-end OTN service, you can create a service trail that traverses different layers and directly create a client service trail. You do not need to know how the service grooming between the OTN layers is implemented and create an ODU0/ODU1 server trail at each layer. After you create a client service, the client service trails at different OTN layers are generated automatically. This simplifies the service configuration process. The end-to-end OTN service configuration includes creating, querying, deleting, and modifying an end-to-end service and optimizing an end-to-end service. The latter is also known as service defragmentation.

4.7 Features of Installation and Commissioning The OptiX OSN 1800 series provide the following features, which simplifies the installation, commissioning, and configuration operations.

4.7.1 Small Form-Factor Pluggable Module There are four types of pluggable modules: the small form-factor pluggable (SFP), Small Form-factor Pluggables Plus (SFP+), the 10 Gbit/s small form-factor pluggable (XFP) and the tunable 10 Gbit/s small form-factor pluggable (TXFP).

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The small form-factor pluggable modules are used on the client side and WDM side of some OTU boards. When the type of the accessed service is changed or the module is faulty, replace only the module rather than the board. The TXFP module supports wavelength adjustment, which significantly reduces costs of spare parts and inventories.

4.7.2 Legible Wavelength Information Label The small form-factor pluggable (SFP) modules on the optical transponder boards can be identified by the label of the wavelength number. And the APD modules or PIN modules used in the receivers of the optical transponder boards are distinguished by colors. In these ways, the types of interfaces are very clear in the on-site commissioning.

4.7.3 Fiber/Cable Interface Safety Design Different fibers and cables of the product use different ports. The ports are very different in appearance. In addition, cable labels are used to indicate the types of the cables. Hence, the installation position of every cable is clear. The cable ports of the OptiX OSN 1800 series are designed to prevent mis-insertion. The installation of cables cannot be complete if the cables are inserted reversely or improperly. If a cable is inserted improperly, no damage may occur in the equipment even when the equipment is powered on. In this way, no serious damage may be generated.

4.8 Master and Slave Shelves The OptiX OSN 1800 series support master and slave shelves. When multiple chassis are required on one NE, the master and slave shelves are cascaded for uniform management of these shelves. In master-slave shelf mode, multiple chassis are displayed as one NE on the NMS. The OptiX OSN 1800 series support one master shelf managing a maximum of six slave shelves. The OptiX OSN 1800 in master-slave shelf mode can form a ring network or a chain network. The ring network is recommended.

4.9 Operation and Administration The OptiX OSN 1800 supports data communication network (DCN) communication, automatic laser shutdown (ALS), and intelligent fibers.

4.9.1 DCN The WDM equipment supports the OSC and the ESC technologies to bear the embedded control channel (ECC) to implement the DCN. The ECC is used to implement the operation, administration, and maintenance (OAM) communication function between NEs. The ECC is established on the data communications channel (DCC). For the SDH equipment, the ECC is carried on the section overhead bytes D1-D12. Generally, the regenerator section overhead bytes D1-D3 are used. For the WDM equipment, the ECC is carried on the OSC or ESC supervisory channel.

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The communication of Huawei ECC is implemented in the following ways: 

HWECC protocol (a proprietary protocol of Huawei) The protocol is used when only Huawei equipment is involved in the networking or when Huawei equipment does not need to interwork with equipment of other vendors to exchange the OAM information.



IP over DCC protocol (a standard protocol) The protocol is used when Huawei equipment interworks with equipment of other vendors to exchange the OAM information.



OSI over DCC protocol (a standard protocol) The protocol is used when Huawei equipment interworks with equipment of other vendors to exchange the OAM information.

Huawei equipment supports all the previous protocol stacks. The HWECC protocol is supported by default. The IP over DCC protocol or OSI over DCC protocol is supported selectively depending on the networking.

4.9.2 Automatic Laser Shutdown The OTU boards of the product provide the automatic laser shutdown (WDM ALS) function. With the ALS function, the OTU board can automatically shut down or turn on the laser based on the condition of the input optical signals to prevent personal injury. The ALS function applies to the client side and WDM side of the OTU board. This function can be enabled or disabled through the network management system. 

When no optical signals are input to the receive optical interface on the client side of the opposite OTU board, the local OTU board automatically shuts down the laser for the output optical interface on the corresponding client side.



When no optical signals are input to the receive optical interface on the WDM side of the OTU board, the OTU board automatically shuts down all the lasers for the output optical interface on the client side with the ALS function enabled.

4.9.3 Intelligent Fiber The OTU board of the product provides the intelligent fiber (IF) function. With the IF function, the OTU board can automatically insert maintenance code streams to the client-side optical interfaces on the downstream board in the case of an input fault on the client or WDM side of the upstream board. Then the fault information can transfer to the client side of the downstream board. The IF function is implemented by using the following methods: 

4-12

IF function enabled −

When no optical signals are input to the receive optical interface on the client side of the opposite OTU board, if the IF function at the corresponding transmit optical interface on the client side of the local OTU board is enabled, the transmit optical interface on the local board automatically inserts maintenance code streams.

−

When no optical signals are input to the receive optical interface on the WDM side of the OTU board or a fault is generated at the ODU or OTU layer, all transmit optical interfaces with the IF function enabled on the client side of the OTU board insert maintenance code streams.


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OptiX OSN 1800 Compact Multi-Service Edge Optical Transport Platform Product Overview 

4 Product Features

IF function disabled −

When no optical signals are input to the receive optical interface on the client side of the opposite OTU board, if the IF function at the corresponding transmit optical interface on the client side of the local OTU board is disabled, the transmit optical interface on the local board inserts the K28.5 code stream.

−

When no optical signals are input to the receive optical interface on the WDM side of the OTU board or a fault is generated at the ODU or OTU layer, all transmit optical interfaces with the IF function disabled on the client side of the OTU board insert the K28.5 code stream.

4.10 Features of Upgrade and Maintenance The product supports upgrade and maintenance features, such as software package loading, hot patches, backup and restoration of NE configuration data, and fault data collection.

4.10.1 Software Package Loading Software upgrade by package loading refers to a process in which all NE software and board software of an NE are loaded at a time to replace the original software. This loading mode avoids the repetitive loading actions for the boards one by one and thus improves the upgrade efficiently. Software package loading includes two modes: package upgrade mode and package diffusion upgrade mode 



When you adopt package upgrade mode, you can load all NE software and board software on the NE at the same time, so that you need not repeat the operation of loading software for one board at a time. When you adopt package diffusion upgrade mode, the mode can be classified in to board-level activation and NE-level activation. In the case of board-level activation, you can use proper activation groups. This greatly improves the loading efficiency.

To ensure that the upgrade is successful, perform a physical check on the OptiX OSN 1800 series before the upgrade, such as checking NE alarms and NE software. Software package loading has the following features: 

The loading process is based on only the desired NE and is performed in one graphic user interface (GUI).



The NE can be automatically managed. The software of the newly seated board is automatically updated when it does not match the software of the NE. So the efficiency of the software upgrade is improved.



Software package loading is an incremental loading process in which only the files that need be updated are loaded.



Software package loading supports the rollback function. When the software or hardware of the system is faulty, the loading fails, and the NE software is restored to the status before loading.

Software package loading applies to the following scenarios: 

Upgrade of NE software



Replacement of equipment software version

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4.10.2 Hot Patch The product supports the hot patch technology. Some equipment requires long-term uninterrupted operation. When a defect is located or a new requirement needs to be applied to the equipment software, a process of replacing old codes with new codes should be performed to rectify the defect or realize the new requirement, without any service interruption. These new codes are referred to as a hot patch. The hot patch technology has the following features: 

The hot patch solves most of the software problems without affecting services.



The hot patch effectively decreases the number of software versions and prevents frequent software version upgrade.



The hot patch operation does not affect services and can be performed remotely. The hot patch also provides a rollback function. This helps to decrease the upgrade cost and to avoid upgrade risks.



The hot patch can be used as an effective method for locating faults, and thus improves the efficiency of solving problems.

4.10.3 Backup and Restoration of NE Configuration Data The configuration data of the product can be backed up and restored in the Flash of the SCC board on the local NE. To ensure the security of the configuration data, the NMS software for the OptiX OSN 1800 series supports the backup of the configuration data (including the board configuration, clock configuration and protection relations of the NE) remotely to the NMS database. During the running of the equipment, if data loss occurs on the SCC board or the equipment power fails, after the equipment is powered on, the user can operate the NE remotely through the NMS software to restore the configuration data from the NMS to NE. When an OptiX OSN 1800 NE resets for five times with in 15 minutes, by default, the system takes that the database of the NE is damaged, and thus the communication between the NE and the NMS stops. In this case, by default, the NE enters the security mode. In this mode, the user can remotely access the equipment through the NMS software. The system software can be or upgraded through software package loading, and thus the NE data is restored. Hence, on-site operations are avoided, and the maintenance cost is reduced.

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5

5 Technical Specifications

Technical Specifications

5.1 Wavelength and Frequency of Optical Channels The wavelength and frequency of the product involve two types of systems, that is, DWDM system and CWDM system.

Nominal Central Wavelength and Frequency of DWDM System Table 5-1 Nominal Central Wavelength and Frequency of DWDM System

Frequency (THz)

Wavelength (nm)

Frequency (THz)

Wavelength (nm)

192.1

1560.61

194.1

1544.53

192.2

1559.79

194.2

1543.73

192.3

1558.98

194.3

1542.94

192.4

1558.17

194.4

1542.14

192.5

1557.36

194.5

1541.35

192.6

1556.56

194.6

1540.56

192.7

1555.75

194.7

1539.77

192.8

1554.94

194.8

1538.98

192.9

1554.13

194.9

1538.19

193.0

1553.33

195.0

1537.40

193.1

1552.52

195.1

1536.61

193.2

1551.72

195.2

1535.82

193.3

1550.92

195.3

1535.04

193.4

1550.12

195.4

1534.25

193.5

1549.32

195.5

1533.47

193.6

1548.51

195.6

1532.68

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5-1



Frequency (THz)

Wavelength (nm)

Frequency (THz)

Wavelength (nm)

193.7

1547.72

195.7

1531.90

193.8

1546.92

195.8

1531.12

193.9

1546.12

195.9

1530.33

194.0

1545.32

196.0

1529.55

Nominal Central Wavelengths of CWDM System Table 5-2 Nominal Central Wavelengths of CWDM System

Wavelength (nm)

Wavelength (nm)

1471

1551

1491

1571

1511

1591

1531

1611

5.2 Chassis Specifications Specifications include dimensions, power consumption, power supply and so on.

OptiX OSN 1800 I Chassis Table 5-3 Technical specifications of ordinary OptiX OSN 1800 I (DC power-supply chassis)

Item

Specification

Dimensions (Height x Width x Depth)

44 mm x 442 mm x 220 mm (1.7 in. x 17.4 in. x 8.7 in.)

Weight (empty chassis)

4.5 kg (9.9 lb.)

Maximum power consumption

150 W

Rated current

3A

Power supply

-48 V to -60 V DC

Table 5-4 Technical specifications of ordinary OptiX OSN 1800 I (AC power-supply chassis)

5-2

Item

Specification




4.5 kg (9.9 lb.)


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Item

Specification

Typical power consumption

100 W

Rated current

1A

Power supply

100 V to 240 V AC

Table 5-5 Technical specifications of OptiX OSN 1800 I chassis integrated with an FMT (DC power-supply chassis)

Item

Specification




8.3 kg (18.3 lb.)


150 W

Rated current

3A

Power supply

-48 V to -60 V DC

OptiX OSN 1800 II Chassis Table 5-6 Technical specifications of ordinary OptiX OSN 1800 II (DC power-supply chassis)

Item

Specification




7 kg (15.4 lb.)


300 W

Rated current

6A

Power supply

-48 V to -60 V DC

Table 5-7 Technical specifications of ordinary OptiX OSN 1800 II (AC power-supply chassis)

Item

Specification




7 kg (15.4 lb.)


200 W

Rated current

2.5 A

Power supply

100 V to 240 V AC

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Table 5-8 Technical specifications of OptiX OSN 1800 II chassis integrated with an FMT (AC and DC power-supply chassis)

Item

Specification


131.7 mm x 442 mm x 283 mm (5.2 in. x 17.4 in. x 11.1 in.)


11.5 kg (25.3 lb.)


300W(DC power-supply chassis) 200 W(AC power-supply chassis)

Rated current

6A(DC power-supply chassis) 2.5 A(AC power-supply chassis)

Power supply

-48 V to -60 V DC(DC power-supply chassis) 100 V to 240 V AC(AC power-supply chassis)

OptiX OSN 1800 OADM Frame Table 5-9 Technical specifications of the OptiX OSN 1800 OADM frame

Item

Specification




4.5 kg (9.9 lb.)


<3.6 W

Rated current

0.3 A

Power supply

12 V DC

5.3 Main Optical Path Specifications This section describes the characteristic of the optical port at points MPI-S or S' and MPI-R or R' as well as the main optical path parameters. A 16-channel system carrying 2.5 Gbit/s or 10 Gbit/s signals supports a maximum of 1×36 dB for a single span. Table 5-10 Main optical path parameters of the DWDM system (G.652 fiber) (with amplifiers)

Item

Unit

Performance Parameter

Span of line

-

7×22 dB

6×22 dB

6×22 dB

5×22 dB

Number of channels

-

16

16

40

40

Maximum bit rate of channel

Gbit/s

2.5

10

2.5

10

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Item

Unit



Optical port at points MPI-S and S' Channel output power

dBm

≥1 dBm

≥1 dBm

≥1 dBm

≥1 dBm

Maximum total output power

dBm

17

17

20

20

Maximum channel power difference at point MPI-S

dB

8

8

4

4

Optical path (MPI-S - MPI-R) Maximum optical path penalty

dB

≤2

≤2

≤2

≤2

Line dispersion tolerance

-

11200 ps/nm

9600 ps/nm

9600 ps/nm

8000 ps/nm

Maximum discrete reflectance

dB

-27

-27

-27

-27

-30 dBm (2.5 Gbit/s APD)

-22 dBm (10 Gbit/s APD)



-21 dBm (2.5 Gbit/s PIN)

-16 dBm (10 Gbit/s PIN)



Optical port at points MPI-R and R' Receiver sensitivity of each channel

dBm

Minimum channel optical signal-to-noise ratio at point MPI-R

dB

15

20

15

20

Maximum channel power difference at point MPI-R

dB

10

10

6

6

Table 5-11 Main optical path parameters of the CWDM system (G.652 fiber)

Item

Unit


Span of line

-

1x27 dB

1x21 dB

1x16 dB

1x16 dB

Number of channels

-

8

8

2

8

Maximum bit rate of channel

Gbit/s

2.5

5

10

10

Optical port at points MPI-S and S' Channel output power

dBm

≥2 dBm

≥3 dBm

≥0 dBm

≥0 dBm

Maximum total output power

dBm

14

17

7

13

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OptiX OSN 1800 Product Overview.pdf

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