OptiX Metro 500 System Description

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HUAWEI

®

OptiX Metro 500 Ultra

Compact STM-1 Multi-Service Transmission Platform

System Description

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Platform

System Description

Manual Version T2-040000-20021031-C-1.10

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 Customer Service Building, Kefa Road,

Science-based Industrial Park, Shenzhen, P. R. China Postal Code: 518057

Website: http://www.huawei.com

Phone: +86-755-26540036 Fax: +86-755-26540035 Email: [email protected]

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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

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TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium, , M900/M1800, TELESIGHT, Quidview, NETENGINE, Musa, OptiX, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN, C&C08 iNET, iBill and infox 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.

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OptiX Metro 500 Compact STM-1 Multi-Service Transmission Platform System Description

2 About This Manual

Purpose of This Manual

The OptiX Metro 500 Ultra Compact STM-1 Multi-Service Transmission Platform System Description provides a brief description of the features, applications, structure and technical specifications of the OptiX Metro 500 .

Hereinafter, OptiX Metro 500 Ultra Compact STM-1 Multi-Service Transmission Platform System Description is referred to as OptiX Metro 500 system description and “OptiX Metro 500 Ultra Compact STM-1 Multi-Service Transmission System” is referred to as OptiX Metro 500 in this manual.

Target Readers

This manual is applicable to those who want to learn about certain aspects of the OptiX Metro 500, such as features, applications, structure, and specifications.

Brief Introduction

Introduction

It briefly introduces the solution of Huawei for the transmission network. Also, it describes the application of OptiX Metro 500 in the network.

Features

This part briefly covers Huawei OptiX series optical transmission products and lists a few outstanding features of the the OptiX Metro 500.

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Multi-Service Transmission Platform System Description

Networking Application

From the angel of network plan, this part in detail deals with the networking application of the OptiX Metro 500.

System Architecture

It introduces the composition of the functional modules of the OptiX Metro 500. Meanwhile, this part deals with the hardware and software structure of this product.

Reliability Design

It introduces the equipment-level protection mode and network-level service protection mode of the OptiX Metro 500.

Operation, Administration and Maintenance

This part is about the major technical features of the OptiX Metro 500 s in such aspects as running, maintenance, and centralized management.

Technical Specifications

This chapter summarizes various technical parameters and specifications of the OptiX Metro 500.

Appendix Abbreviations

The appendix lists all abbreviations used in the system description together with their full names to facilitate the comprehension.

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1 Brief Introduction

1 Overview 1

2 Application 3

2 Characteristics of OptiX Metro 500

1 Characteristics 5 2 Functions 7

3 Networking Application

4 System Architecture

1 Functional Modules 11 1.1 Line Unit 12 1.2 Tributary Unit 12 1.3 Cross-Connect Unit 13 1.4 SCC Unit 13 1.5 Clock Unit 13 1.6 Orderwire Unit 13 2 Hardware Structure 14 2.1 Equipment Box 15 2.2 Board 16 3 Software Structure 17 3.1 Host Software 17 3.2 NM System 18

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5 Reliability Design

1 Redundancy and Protection of OptiX Metro 500 19 1.1 1+1 Redundancy Hot Backup Protection for Power

Supply 19

1.2 Protection in Abnormal Conditions 19 1.3 Software Fault-Tolerance 20

1.4 Data Security 21

2 Network Protection 22

2.1 Two-fiber Unidirectional Path Protection Ring 22 2.2 Two-fiber Bidirectional Path Protection Ring 24

6 Operation, Administration and Maintenance

1 Operation and Maintenance 27

2 OptiX iManager T2000 28

7 Technical Specifications

1 Features 30 1.1 Multiplexing Structure 30 1.2 Interface Type 31 1.3 Application Types 32

1.4 Power Supply and Consumption 32 1.5 Mechanical Structure 32 1.6 Electromagnetic Compatibility (EMC) 33 1.7 Environment Requirements 33

2 Major Indices 34

2.1 Optical Interface Specifications 34 2.2 Electrical Interface Specifications 37

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3 Introduction

1 Overview

The OptiX Metro 500 is designed to improve the bandwidth utilization and management efficiency of the optical transmission network. It can transport and manage the STM-1 and E1 services. The OptiX Metro 500 features high integration, easy installation and multiple power supply access modes. These features make it very suitable to transport terminal accessed services, thus reducing telecom operation cost.The appearance of the OptiX Metro 500 is shown in Figure 1.

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Introduction Multi-Service Transmission PlatformSystem Description

Figure 1 Appearance of t he OptiX Metro 500

As one of the OptiX Metro series products of Huawei, the OptiX Metro 500 is mainly used for the service access and transmission at the access layer of the digital communication network. Also, it can be used to construct a communication network via the E1 interface together with access network equipment, GSM base station, CDMA base station ,ETS base station, switch, router, etc.

The OptiX iManager T2000 network management system for transmission network (abbreviated as OptiX iManager T2000 hereinafter) can be used to manage the OptiX Metro 500. On the NMS terminal, you can configure, maintain, and monitor the OptiX Metro 500 and the network constructed by it. At any of the NEs or at the remote NMS center of this transmission network, the authorized user can maintain the entire network via the OptiX iManager T2000.

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Introduction

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description

2 Application

The OptiX Metro 500, together with other SDH transmission equipment, such as the OptiX 155/622H(Metro1000), OptiX 155/622, OptiX Metro 1100, OptiX 2500+(Metro3000), and

OptiX 10G, can be used to construct the transmission network. The OptiX series of optical transmission products of Huawei are shown in Table 1.

Table 1 OptiX series tra nsmission products

Product type Product name

OptiX Metro 500 Compact STM-1 Multi-Service Transmission Platform.

OptiX 155S STM-1 optical transmission system

OptiX 155/622H(Metro1000) Integrated STM-1/STM-4 MSTP compatible optical

transmission system

OptiX 155/622 STM-1/STM-4 compatible optical transmission system OptiX 2500+(Metro3000) STM-16 MADM optical transmission system

OptiX Metro 1100 Integrated STM-16 multi-service transmission system

OptiX 10G STM-64 MADM optical transmission system

OptiX Metro 6100 DWDM multi-service transmission system OptiX BWS 320G 16/32-path DWDM optical transmission system OptiX BWS1600G Backbone DWDM optical transmission system

OptiX iManager T2000 Subnet-level integrated network management system for transmission network

The OptiX Metro 500 is a piece of compact end network transmission equipment. It can be used to construct basic networks, such as point-to-point, chain network, ring network, etc. The application of the OptiX Metro 500 in the whole transmission network is illustrated in Figure 2.

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Introduction Multi-Service Transmission PlatformSystem Description O ptiX BW S 320G OptiX BW S 320G OptiX BW S 320G OptiX BW S 320G OptiX BW S 320G 32λ _{32 λ} 32λ 32λ 32 λ Backbone network OptiX 10G OptiX 10G OptiX 2500+ O ptiX 155/622 O ptiX 155/622H O ptiX 155/622 OptiX 155/622H Local area network

End access network

OptiX 2500+ OptiX 2500+ OptiX 2500+ OptiX 2500+ OptiX 10G OptiX 10G OptiX 10G OptiX 10G Regional network OptiX 10G OptiX 2500+ OptiX 2500+ OptiX 2500+ OptiX Metro 500 OptiX Metro 500

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4 Features and Functions

1 Features

The OptiX Metro 500 is a STM-1 optical transmission equipment designed by Huawei accrording to the demand of the low-end transmission market. It adopts 19-inch standard structure and has the following features.

Small dimensions, low cost, and easy installation and maintenance. The

following installation methods are supported:Installation in the OptiX C series compact cabinets, installation in 19-inch standard cabinet, installation in the 300mm-deep ETSI cabinet, installation in the 600mm-deep ETSI cabinet, wall-mounting installation, and installation on desktop .

Provides five power supplies, i.e. 220V AC, 110V AC, -48V DC, -60V and +24V DC. 220V AC power board is compatible with 110V AC. -48V DC power board is compatible with -60V DC.

Has the capability of processing two ECCs.

Provides one clock inpout /output of 120Ω(not available in the first version

V100R001, but in the second version V100R002).

Provides three Boolean input and one output (not available in the first version

V100R001, but in the second version V100R002).

Supports multiple optical transmission distances, such as 30km/50km/90km.

Enjoys good compatibility, which is beneficial to extending the function later.

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Features and Functions Multi-Service Transmission PlatformSystem Description The second version V100R002 of the OptiX Metro 500 will support the transparent transmission of Ethernet service.

Outstanding interface jitter performance

The E1 interface mapping jitter, combination jitter of the OptiX Metro 500 are superior to ITU-T recommendations, which enables the system to reliably transmit services, such as GSM, NO.7 signaling, data communication, etc.

Outstanding clock synchronization performance

The timing system can work in the modes such as locked, holdover, or free-run mode. When the timing system works in the locked mode, you can select a line clock or tributary clock as the clock reference. By setting the priorities of the clock sources, the reliability of the system can be guaranteed.

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Features and Functions

2 Functions

1. Service cross-connect capability

The OptiX Metro 500 can support 6×6VC-4 full cross-connect.

2. SDH/PDH service proceesing capability

The OptiX Metro 500 provides one or two STM-1 optical interfaces to receive one or two STM-1 optical signals. Meanwhile, it provides 8/16/24/32 E1 electrical interfaces.

3. Flexible networking capability

The OptiX Metro 500 supports multiple network topologies, including point-to-point, line and ring.

4. Protection mechanism

The OptiX Metro 500 supports unidirectional/bidirectional path protection ring.

5. Network Management System (NMS)

The OptiX iManager T2000 performs unified Operation, Administration and Management (OAM) on the OptiX Metro 500, and achieves the configuration and grooming of circuits for a secure network operation.

6. Power monitoring function

When the -48V DC power supply is adopted, the OptiX Metro 500 provides two -48V input ports working in mutual backup. Besides, it can monitor abnormal status of the voltage, such as undervoltage and overvoltage, and can generate corresponding alarms.

When the +24V DC power supply is provided, the OptiX Metro 500 can provide two +24V input ports working in mutual backup. Besides, it can monitor abnormal status of the voltage such as undervoltage and overvoltage, and can generate

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5 Networking Application

The OptiX Metro 500 can be deployed in two types of network topologies as followed.

Chain network

Figure 3shows an ordinary chain network. When it is adopted, the service is generally transmitted bidirectionally.

This networking mode needs few optical fibers, so it is very applicable to the network along the railway not ring network.

STM-1 optical signal STM-1 optical signal E1 electrical signal TM ADM TM E1 electrical

signal E1 electrical signal

Figure 3 Chain network

Ring network

Figure 4 shows a basic ring network. The OptiX Metro 500 itself can construct the ring network with the rate of STM-1. Besides, it can realize the following ring network self-healing protection modes (recommended in ITU-T): two-fiber unidirectional path

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Networking Application

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description The advantage of this networking mode lies in its simple service flow direction, which is convenient for service distribution.

E1 electrical signal ADM ADM ADM ADM STM-1 ring E1 electrical signal E1 electrical signal E1 electrical signal

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6 System Architecture

1 Functional Modules

The OptiX Metro 500 is designed in compliance with ITU-T recommendations. Figure 5 shows the functional structure of the system.

STM-1 optical signal E1 electrical signal

VC-4 6 6 VC-4 VC-4 Cross-connect matrix TU LU Orderwire unit Clock unit SCC unit

Figure 5 Functional mod ules of the OptiX Metro 500

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System Architecture

1.1 Line Unit

The line unit of the OptiX Metro 500 offers one or two STM-1 optical interfaces to receive and transmit the STM-1 optical signals. These interfaces mainly perform optical/electrical conversion of the STM-1 signal, extraction/insertion of the overhead bytes and generation of alarm signals on the line. It supports inloop and outloop tests of the line so that you can locate the fault as soon as possible.The line unit of the OptiX Metro 500 has the following features:

Optical interface characteristics: can configure three optical modules, i.e. S-1.1,

L-1.1, and L-1.2 and provides multiple optical transmission distances, e.g. 30km/50km/90km.

Has the Automatic Laser Shutdown (ALS) function.

Capable to detect and report various alarm signals and performance events on

the lines.

Has inloop and outloop functions.

With the cooperation of the cross-connect unit, it can construct ring and chain networks.

1.2 Tributary Unit

The tributary unit of the OptiX Metro 500 maps accessed E1 signals (75Ω/120Ω) into VC-4 (then to the connect unit). Conversely, it demaps VC-4 from the cross-connect unit into E1 signals. At the same time, it reports performance and alarm data of each path to the SCC unit. The tributary unit of the OptiX Metro 500 has the following features: The tributary unit of the OptiX Metro 500 maps accessed E1 signals (75Ω/120Ω) into VC-4, and then to the cross-connect unit. Conversely, it demaps VC-4 from the cross-connect unit into E1 signals. At the same time, it reports performance and alarm data of each path to the SCC unit.The tributary unit of the OptiX Metro 500 has the following features:

Provides unbalanced impedance interface of 75Ω and balanced impedance

interface of 120Ω. 2mmHM connectors are used for both 75Ω and 120Ω interfaces to connect coaxial cables and twisted-pair cables respectively. Interfaces meet the specifications stipulated in ITU-T Recommendation G.703.

Processes VC-12 path overhead, performs configuration, alarm and

performance monitoring for each service path and establishes the communication between each service path and the SCC unit.

The process of asynchronously mapping and multiplexing E1 signals into

VC-4, complies with ITU-T Recommendation G.707.

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System Architecture Multi-Service Transmission PlatformSystem Description

Has the APS function. By setting the path protection switching function via the

NM system, whether the path protection is to be triggered is determined by the deterioration of corresponding path signals on active/standby rings with the dual-fed, signal selection function.

1.3 Cross-Connect Unit

The connect unit is the core of the service grooming and serves as the cross-connect of line and tributary signals in the OptiX Metro 500 equipment. It can flexibly realize the free grooming of E1 services and support path protection. Also, it supports multiple configuration of the equipment and various networking modes, such as point-to-point, chain and ring.

1.4 SCC Unit

The SCC unit, as an important module, fulfills Synchronous Equipment Management Function (SEMF) and Message Communication Function (MCF). The SCC unit has the Ethernet network management interface, through which, the control and setting data of all the units can be received on a PC or workstation. Meanwhile, The SCC unit provides the DCC communication function to communicate with the remote NE.In addition, the SCC unit communicates with the line and tributary units, and monitor alarms on them. Also, it collects the performance data and delivers them to the NMS regularly.

1.5 Clock Unit

The clock unit mainly fulfils synchronization. It provides the synchronous clock for line and tributary units of the system, and also locks the line and tributary clock sources to achieve system synchronization.At the same time, it offers one clock output of 120 (not available until the second version V100R002).

1.6 Orderwire Unit

This orderwire unit mainly realizes part of OHA function and DCC processing function of the MCF.

It provides one transparent data interface, three Boolean inputs and one Boolean output. The interface is of RJ-45.Here, the function of “three Boolean inputs and one Boolean output” will not be offered until the second version V100R002.

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System Architecture

2 Hardware Structure

The OptiX Metro 500 adopts a box-shaped structure. The dimensions are: 436mm (width) 293mm (depth) 42mm (height). Figure 6 and Figure 7 show its

appearance and backplane.

Figure 6 Appearance of t he OptiX Metro 500

Figure 7 Backpanel of th e OptiX Metro 500

The compact structure of the OptiX Metro 500 enables its flexible installation. According to the actual equipment room environment, you can select to install it in the

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System Architecture Multi-Service Transmission PlatformSystem Description OptiX C series integrated cabinet, 300mm-deep ETSI cabinet, 600mm-deep ETSI cabinet, or 19-inch standard cabinet. Also, you can adopt wall-mounting installation or desktop installation.

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System Architecture

2.1 Equipment Box

Figure 8 shows the back of the OptiX Metro 500. For detailed description, see Table 2.

Figure 8 Wiring area of th e back of the OptiX Metro 500

Table 2 Description of th e interfaces of the OptiX Metro 500

Tag Silkscreen Description Remarks

1 Grounding terminal OptiX Metro 500 connects with

PGND in equipment room by this grounding terminal.

2 PW48 Power supply of -48V There are five kinds of power

supply: 220V AC, 110V AC, -48V DC,-60V,+24V DC. 220V AC power board is compatible with 110V AC. -48V DC power board is compatible with -60V DC

3 ON/OFF Power switch

RUN Running indicator Dark : OptiX Metro 500 is not

powered

Flash per 0.5 second : waiting for loading software

Quick Flash : loading software Slow flash : running normaly 4

CRT Serverly alarm

indicator

Dark :no critical alarm Light :critical alarm

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Tag Silkscreen Description Remarks

MAJ Major alarm indicator Dark : no major alarm

Light : major alarm

LOS Left Optical interface

indicator 5

LOS Right Optical interfaceindicator

6 Optical Interface There are three types of optical

module :S-1.1/L-1.1/L-1.2 Transmission

distance :30km/50km/90km

7 RST Reset Key Reset OptiX Metro 500

8 ETHERNET Network management

interface

To connect the NM.

9 F2 Transparent data

interface It is used to transmit supervsiondata and its electrical attribute is RS-232.

10 ALARM Alarm Boolean It is used to transmit alarm data.

11 CLK interface of the

120Ω clock Input or output of 120Ω clock. (not available in V100R001,but supported by the software of the second version V100R002 12 16 13 12 9 8 5 4 1 2mmHM connector To receive and transmit E1

electrical signals

13 EXT Extended slot To which the SP2 board or the

Ethernet interface board can be added to; can be used to add/drop E1 signals. 14

ESD

Antistatic interface To which the antistatic wrist strap is inserted.

15 Fan

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System Architecture

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description supports the SP2D board.

ISU provides one or two STM-1 optical interfaces, and eight or sixteen E1 electrical interfaces.

The SP2D offers sixteen E1 electrical interfaces.

In the following versions, the extended slot will support such boards as the Ethernet board, etc.

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3 Software Structure

The OptiX Metro 500 system adopts modular design for the software system. Basically, software system can be divided into NE software and NMS, which lie in the ISU control unit and the NMS computer respectively to realize specific functions. 错误未找到引用源 shows the software structure of the OptiX Metro 500 system.In this figure, all the modules belong to the NE software except “Network management system”. The following details the functions of these two modules and how the functions are implemented.

Network management system

Equipment management module Communication module R e al-t im e mult i-t a sk o p erat ing syst em D a tabase management m od u le

Figure 9 General structu re of the OptiX Metro 500 system software

3.1 NE Software

Realtime multi-task operating system

The realtime multi-task operating system of the OptiX Metro 500 system 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 independent of the processor hardware.

Equipment management module

Equipment management module is the kernel of the NE software for implementing network element management, and it includes Manager and Agent. Manager can send network management operation commands and receive events. Agent can respond the network management operation commands sent by Manager, operate the managed object, and send events according to the change in the state of the managed object.

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System Architecture

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description The communication module exchanges management information between the NM system and NE and among NEs. It consists of network communication module, serial communication module and ECC communication module.

Database management module

The database management module is an organic part of the NE software. It includes two independent parts: data and program. The data are organized in the form of a database, consisting of network database, alarm database, performance database and equipment database. The program accesses and manages data in the database.

3.2 NM System

The OptiX iManager T2000 NMS exercises unified management on the optical transmission system and provides maintenance for all SDH, 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 the NE software via the communication module to monitor and manage the equipment over the network.

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7 Reliability Design

The OptiX Metro 500, with multiple up-to-date protection technique employed in designing its hardware and software, provides various protection mechanisms for the network, thus guaranteeing a high-quality transmission service.

1 Redundancy and Protection

1.1 1+1 Redundancy Hot Backup Protection for

Power Supply

The power supply systems of -48V and +24V are offered by two DC operating

power supplies connected from the outside, which can provide backup protection for each other. Thus, the equipment keeps running normally in case either of them is faulty.

Double backup for the 220V inner power module

1.2 Protection in Abnormal Conditions

Maintenance alarm for abnormal system

An alarm will be generated to notify the network monitoring terminal once any abnormality is detected in the system by the hardware or software.

Power supply protection

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Reliability Design

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description Meanwhile, board hardware is designed in such a way that CPU will be reset in case of undervoltage and the software will reinitialize the chip.

Protection on board power failure and software reset

The application program and its data file are stored both in SDRAM and in FLASH. Meanwhile, FLASH provides the backup protection for the data saved in SDRAM.In case of board power failure or software reset, the software can automatically recover the correct program and data from FLASH before the power failure or software reset.

Power failure protection and break-point resending protection

The BIOS of the board is write-protected. The program and data files of application software, which can be loaded on-line, are configured with check function to avoid incorrect data transmission. After the software loading is interrupted, the BIOS waits for continuous loading at the breakpoint instead of restarting to load the whole program or data files.

Software upgrading protection

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

1.3 Software Fault-Tolerance

The CMM specifications are initiated for controlling the development process,

with the idea of software engineering highlighted. Extensive software quality assurance activities are carried out, and the top-down program design and object-oriented design are followed. With up-to-date software development, management and design technique, the quality and reliability of software are guaranteed.

The software features IC and simple modular interface, and realizes high cohesion and low coupling.

It has powerful CPU load equalization and overload processing capability by

adopting information driving and grooming.

It provides multi-level protection on software program and data, and has self-check and self-recovery functions.

The board software provides mirror protection on important registers, thus

protecting the hardware against the influence of any abnormalities like voltage fluctuation.

All the inter-board communication adopts check and retransmission

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Reliability Design Multi-Service Transmission PlatformSystem Description

The board software provides mirror protection on important registers, thus

protecting the hardware against the influence of any abnormalities like voltage fluctuation.

Software is made more reliable with software platform technique, code sharing

and multiplexing, and extensive multiplexing of available mature software modules.

1.4 Data Security

The security is improved by adopting database module to perform unified management on the data.

Both the database and its files have their own data check function.

The database files are provided with hierarchical protection according to the

importance of the data, so that the error in the lower-level database will not affect the higher-level database.

In FLASH two backups for the database are available, which serve as the

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Reliability Design

2 Network Protection

The OptiX Metro 500 has good network self-healing protection capability, and provides path protection stated in ITU-T Recommendations. In case of fiber cut, line board damage or node failure, it will initiate protection for the service with the switching time less than 50ms.

Below the path protection provided by the OptiX Metro 500 is discussed.

2.1 Two-fiber Unidirectional Path Protection

Ring

The protection switching principle of two-fiber unidirectional path protection ring is “bridging at head-end and switching at tail-end”. The two-fiber unidirectional path protection ring utilizes one optical fiber, called fiber S or working fiber, to transmit service signals and another one, called fiber P or protection fiber, to transmit the same signals for protection. When all the nodes in the ring work run normally, they transmit signals in the same direction as they receive signals. That is, if a node transmits signals in clockwise direction it will receive signals in clockwise direction. But the route is diverse. For example, the route of traffic signals transmitted from station A to station C is A B C while the route of traffic signals transmitted from station C to station A is C D A. The intermediate stations passed by are different, as shown in Figure 10.

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Reliability Design Multi-Service Transmission PlatformSystem Description A B C D S S P P CA AC AC CA A B C D S S P P CA AC AC CA (a) (b) Switching

Figure 10 Two-fiber unidir ectional path protection ring

In normal status the signal flow is shown in Figure 10 (a). Traffic signal AC is added to the ring at node A with node C as destination, and then is transmitted over fibers S and P at the same time. And fiber S sends the traffic signal to node C through node B clockwise, while fiber P sends the same signal to C through D as a protection signal. Node C selects to drop the traffic signal with better quality from two directions. Normally it receives traffic signal sent over fiber S). Likewise, the traffic signals that enter the ring at node C with node A as destination are sent to node A in the same way.

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Reliability Design

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description node C are protected.After the fault is removed, the switching switch will replace to its original position generally after continuous detection lasting for 10 minutes.The service from node C to node A needs no switching.

2.2 Two-fiber Bidirectional Path Protection

Ring

The protection switching principle of two-fiber bidirectional path protection ring is similar to that of unidirectional path protection ring except that the routes for signal receiving and transmission in bidirectional protection ring are identical, as shown in Figure 11.

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Reliability Design Multi-Service Transmission PlatformSystem Description A B C D S1 P2 S2 P1 CA AC AC CA A B C D S1 P2 S2 P1 CA AC AC CA (a) (b)

Switching Switching

Figure 11 Two-fiber bidire ctional path protection ring

Figure 11(a) shows the signal direction in normal status. Traffic signal AC that enters into the ring from node A with node C as destination is sent over fiber S1 and fiber P1simultaneously. Fiber S1 transmits the traffic signal to the destination node C via node B in the clockwise direction, while fiber P1 transmits the same signal as protection signal to the destination node C via node D in the counter-clockwise direction.Node C drops the signals sent over fiber S1, which serve as working signal. Similarly, traffic signal CA that enter the ring at node C with node A as destination is simultaneously transmitted over both fiber S2 and fiber P2. Fiber S2 transmits the traffic signal to the destination node A via node B in the counter-clockwise direction,

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Reliability Design

OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description destination node A in the clockwise direction. Node A receives the traffic signal sent over fiber S2, which serve as working signal.

Note:

The difference between a bidirectional ring and a unidirectional ring is as follows: In normal situation, the service signals from node A to node C on a bidirectional ring is transmitted in the clockwise direction, and the service signals transmitted from node C reach node A in the counter-clockwise direction. On a unidirectional ring, the service signals from node A are transmitted to node C in the clockwise direction, and the service signals from node C to node A are also transmitted in the clockwise direction.

Suppose that the optical fiber between nodes B and C is cut off, as shown in Figure 1 (b).At node C, since AC signal transmitted over fiber S1 is lost, the switching switch of node C will switch to fiber P1 to receive AC signal sent from node A over fiber P1, thus protecting traffic signal between node A and node C. The switching switch will usually restore to its original position when the fault has been eliminated.At node A, since CA signal transmitted over fiber S2 is lost, the switching switch of node A will switch to fiber P2 to receive CA signal sent from node C over fiber P2, thus protecting traffic signal between node C and node A. The switching switch will usually restore to its original position when the fault has been eliminated.

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8 Operation, Administration and

Maintenance

1 Operation and Maintenance

OptiX Metro 500 has been improved in its box & board design and function setting to satisfy users’ requirements for the operation and maintenance of the equipment. It provides powerful equipment maintenance capabilities, including:

Provides the function of audible and visual alarm. In case of any emergency it

will be triggered to remind the network administrators for appropriate actions.

Dynamically monitors the equipment running and alarm status of all stations on

the network via the NM system. The NM system will give audible alarm once any alarm occurs.

Supports on-line upgrading and loading of the NE software.

Has remote maintenance function. The maintenance personnel can maintain

the OptiX Metro 500 system on public switched telephone network if the equipment is faulty.

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Operation, Administration and Maintenance

2 OptiX iManager T2000

The OptiX Metro 500 product is managed by the OptiX iManager T2000 NMS. The OptiX iManager T2000 has been designed, with strict process management technique (such as RUP, CMM) and multiple advanced design and development methods employed, to realize a new generation of iMAP network management architecture. The OptiX iManager T2000 can:

(1) Respond more rapidly to the demands of the user and management equipment.

(2) Provide more practical and powerful management function desired by the user.

(3) Provide end-to-end trail management function.

According to relevant ITU-T Recommendations about TMN, the management function of the telecommunication network has five layers, namely from down to top, Network Element Layer (NEL), Element Management Layer (EML), Network Management Layer (NML), Service Management Layer (SML) and Business Management Layer (BML).

The functions of respective layers are as follows:

(1) NEL, with the functions realized mainly in the network equipment, is capable of configuration management, fault management, performance management, etc. of a single NE. Meanwhile, it can respond to various events, e.g. path recovery for protection, by using the control management information transferred in the overhead of SDH. OptiX series host equipment achieves whole NEL functions.

(2) EML controls the equipment directly and provides such functions as configuration management, fault management, performance management and security management.

(3) NML, engaged in surveillance and control over the network equipment within its management scope, shall have the main management functions required by TMN.

(4) SML, with the emphasis on contract and order management, is the basic contact point with the users in providing and terminating service, accounting, service quality, fault report, etc.

(5) BML is mainly engaged in the overall planning and the agreements concluded with the operators.

According to actual users’ requirements, OptiX iManager T2000 also provides part of network-level management system function, such as end-to-end trail management and resource management, while providing NE-level management system functions. Based on the excellent design, it offers a good performance/price ratio of the Element Management System/Sub-Network Management System (EMS/SNMS) in the market of optical networks worldwide.

iManager T2000 has the following management functions of Sub-Network Management Layer (SNML):

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Operation, Administration and Maintenance Multi-Service Transmission PlatformSystem Description

Trail management

Network protection and network resource management Service guarantee

DCN network management

Management of equipment physical position and topological connection

relation

These SNML functions are implemented in the view. To realize simple and effective operation and maintenance, the user only needs to adopt configuration and management by “point and click”.

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9 Technical Specifications

1 Features

To help users understand this system, this section lists features of the OptiX Metro 500 system in such aspects of the interface, power supply, structure, etc.

1.1 Multiplexing Structure

The multiplexing structure, adopted in OptiX Metro 500, complies with ITU-T recommendation G.707, as shown in Figure 12.

STM-1 AUG AU-4 VC-4 TUG-3 TUG-2 TU-12 VC-12 C-12 X1 X1 X3 X3 X7

Section Overhead process Multiplexing

Pointer Process Path Overhead Process Bit rate Adjustment

2048kbit/s

Figure 12 Multiplexing stru cture

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Technical Specifications Multi-Service Transmission PlatformSystem Description

1.2 Interface Type

Table 3 shows types of interfaces provided by the OptiX Metro 500. Table 3 Types of interfa ces

Interface type Interface rate and feature

Electrical interface 2048kbit/s Optical interface 155520kbit/s

Auxiliary interface NM interface (10M Ethernet interface) One RJ-45 transparent data interface

Three Boolean input interfaces and one Boolean output interface

One RJ-45 clock output interface

2. Electrical interface

Table 4 shows types of electrical interfaces provided by the OptiX Metro 500, which comply with ITU-T recommendation G.703.

Table 4 Types of electric al interfaces

Electrical

interface rate Code type Transmission media

2048kbit/s HDB3 120ΩBalanced line; 75Ω unbalanced line

3. Optical interface

Table 5 shows types of optical interfaces provided by the OptiX Metro 500, which comply with ITU-T recommendation G.957.

Table 5 Types of optical interfaces

Optical interface Interface type

STM-1 optical interface S-1.1/L-1.1/L-1.2

Laser security: It has laser shut-off function, complying with ITU-T recommendation G.958.

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4. Auxiliary interface

Table 6 shows auxiliary interfaces provided by the OptiX Metro 500. Table 6 Auxiliary interfa ces

Management interface Ethernet: RJ-45 interface (10M Ethernet interface) Data interface One RJ-45 transparent data interface (with Max. rate of

19.2kbit/s) Alarm Boolean

input/output interface ALM IN/OUT: Three Boolean input interfaces and oneoutput interface (this will not available until the second version software is provided)

Clock output interface One 120Ω clock output interface (this will not available until the second version software is provided)

1.3 Application Types

OptiX Metro 500 can be configured as ADM or TM.

1.4 Power Supply and Consumption

Power supply: Except the power interfaces of -48V DC and +24V DC, it offers the access of 220V AC, which widens its application scope.

Total power consumption: Less than 35W.

1.5 Mechanical Structure

The size of the OptiX Metro 500 is: 436mm (width) × 293mm (depth) × 42mm (height) Table 7 shows the auxiliary cabinet.

Table 7 Mechanical stru cture of the auxiliary cabinet

600mm (width) × 450mm (depth) × 1,600mm (height) 600mm (width) × 600mm (depth) × 2,000mm (height) 600mm (width) × 600mm (depth) × 2,200mm (height) Cabinet size

(OptiX C series cabinets)

600mm (width) × 600mm (depth) × 2,600mm (height)

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Technical Specifications Multi-Service Transmission PlatformSystem Description Electromagnetic compatibility of the OptiX Metro 500 complies with specifications of ETS300386 and ETS300127. Table 8 shows the details.

Table 8 Electromagnetic compatibility of the OptiX Metro 500

Radiated emission Complying with the specifications of EN55022 Conducted emission Complying with the specifications of EN55022 Electrostatic discharge Complying with the specifications of EN61000-4-2 Inject current Immunity Complying with the specifications of ENV50141 Immunity to radiated

electromagnetic fields Complying with the specifications of ENV50140

1.7 Environment Requirements

Table 9 shows environment conditions required by the OptiX Metro 500 . Table 9 Environment req uirements

Environment requirements Item

Temperature Humidity

Operating range of expected

performance 0°C ~ 45°C

10 ~ 90%

Short-term work range -5°C ~ 50°C 5 ~ 95%

Transport and storage -40°C ~ 70°C ≤95%

*Short-term: Indicates the period of continuous operation is not more than 72 hours, and the annual operation period is not more than 15 days.

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2 Major Indices

This section lists ITU-T specifications related to transmission systems, such as those for optical/electrical interfaces, clock synchronization, EMC and environment, along with actual test results of the OptiX Metro 500 system.

2.1 Optical Interface Specifications

1. Parameter specifications for optical interfaces

(1) Classification of optical interfaces

Different launched optical powers and receiver sensitivities may lead to different possible transmission distances. Table 10 shows the classification of optical interfaces supported by the OptiX Metro 500.

Table 10 Classification co des of optical interfaces

Inter-office communication Application

Short-haul Long-haul

Nominal wavelength (nm) 1310 1310 1550

Optical fiber type G.652 G.652 G.652

Type S-1.1 L-1.1 L-1.2

STM-1 _Transmission

distance (km) 30 50 90

(2) Optical interface parameters

Table 11 shows the specifications for the parameters of optical interfaces provided by the OptiX Metro 500.

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Technical Specifications Multi-Service Transmission PlatformSystem Description Table 11 Parameters spe cified for STM-1 optical interface

Item Unit Value

Nominal bit rate kbit/s STM-1 155520

Classification code - S-1.1 L-1.1 L-1.2

Operating wavelength range Nm 1261-1360 1280-1335 1480-1580

Source type - MLM MLM SLM

-Max. RMS spectrum width (σ) Nm 7.7 3

-Max. -20dB spectrum width Nm - - 1

-Min. side mode suppression ratio

dB - - 30

Max. mean launched power dBm -8 0 0

Min. mean launched power dBm -15 -5 -5

Characteristics of transmitter at point S

Min. extinction ratio dB 8.2 10 10

Attenuation range dB 0-12 10-28 10-28

Max. dispersion ps/nm 96 246 NA

Min. optical return loss of cable at point S (including any connectors)

dB NA NA 20

Characteristics of optical path at point SR

Max. discrete reflectance between points S and R

dB NA NA -25

Min. sensitivity dBm -28 -34 -34

Min. overload point dBm -8 -10 -10

Max. optical path penalty dB 1 1 1

Characteristics of receiver at point S

Max. reflection coefficient of

receiver at point R dB NA NA -25

2. Mean launched power

Table 12 shows indices for mean launched power of respective types of optical interfaces provided by the OptiX Metro 500.

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OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description Table 12 Mean launched power

Optical interface

level Optical interface type Standard requirements(dBm)

S-1.1 -15 ~ -8

L-1.1 -5 ~ 0

STM-1

L-1.2 -5 ~ 0

3. Extinction Ratio (EX)

Table 13 shows indices for extinction ratio of respective types of optical interfaces provided by the OptiX Metro 500.

Table 13 Extinction Ratio (EX)

level Optical interface type Standard requirements (dB)

S-1.1 > 8.2

L-1.1 > 10

STM-1

L-1.2 > 10

4. Receiver sensitivity (BER=1×10-10₎

Table 14 shows indices for receiver sensitivity of respective types of optical interfaces provided by the OptiX Metro 500.

Table 14 Table 5 Receive r sensitivity

Optical

interface level Optical interface type Standard requirements (dBm)

S-1.1 < -28

L-1.1 < -34

STM-1

L-1.2 < -34

5. Receiver overload optical power (BER=1×10-10₎

Table 6 shows indices for receiver overload optical power of respective types of optical interfaces provided by the OptiX Metro 500.

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Technical Specifications Multi-Service Transmission PlatformSystem Description Table 15 Receiver overlo ad power

level Optical interface type Standard requirements (dBm)

S-1.1 > -8

L-1.1 > -10

STM-1

L-1.2 > -10

6. Permitted frequency deviation of optical input interface

Table 16 shows indices for permitted frequency deviation of optical input interface of respective types of optical interfaces provided by the OptiX Metro 500.

Table 16 Permitted frequ ency deviation of optical input interface

Optical interface level Standard requirements (ppm)

STM-1 !20

7. AIS bit rate of optical output interface

Table 17 shows indices for AIS bit rate of optical output interface of respective types of optical interfaces provided by the OptiX Metro 500.

Table 17 Output AIS bit r ate

Optical interface level Standard requirements (ppm)

STM-1 !20

2.2 Electrical Interface Specifications

1. AIS bit rate of electrical output interface

Table 1 shows indices for AIS bit rate of electrical output interface of respective types of electrical interfaces provided by the OptiX Metro 500.

Table 18 Table 1 AIS bit r ate of electrical output interface

Electrical interface type Specification requirements (ppm)

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2. Attenuation tolerance of input interface

Table 19 shows indices for the attenuation tolerance of the input port of respective electrical interfaces provided by the OptiX Metro 500.

Table 19 Attenuation tole rance of input interface

Electrical interface type Specification requirements (dB)

2048kbit/s 0 ~ 6

3. Permitted frequency deviation of the input interface

Table 20 shows indices for the permitted frequency deviation of the input interface of respective electrical interfaces provided by the OptiX Metro 500.

Table 20 Permitted frequ ency deviation of the input interface

Electrical interface type Specification requirements (ppm)

2048kbit/s ±50

4. Anti-interference ability of the input interface

As the space electromagnetic field brings interference to the transmission cable, the input interface is required to possess certain anti-interference ability. Table 21 shows indices for the anti-interference ability of the input interface of E1/T1 electrical interfaces provided by the OptiX Metro 500.

Table 21 Anti-interference ability of the input interface

Electrical interface type Specification requirements (signal-_{to-noise ratio)}

2048kbit/s 18dB

2.3 Clock Timing and Synchronization

Specifications

1. Output frequency accuracy of the internal oscillator in free-run mode

In free-run mode, output frequency accuracy of the internal oscillator complies with ITU-T recommendation G.813.

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Technical Specifications Multi-Service Transmission PlatformSystem Description

2.4 Jitter Performance Specifications

1. Output jitter of the SDH STM-1 synchronous interface

Table 22 shows output jitter indices of STM-1 interfaces provided by the OptiX Metro 500.

Table 22 STM-1 output in terface jitter

Output jitter (Ulp-p)

B1 (f1~f4) B2 (f3~f4)

Optical interface level

type _{Specification}

requirements Specificationrequirements

S-1.1 0.50 0.10

L-1.1 0.50 0.10

STM-1

L-1.2 0.50 0.10

2. Input jitter and wander tolerance of the SDH STM-1 interface

Table 23 and Table 24 show indices for the input jitter tolerance of STM-1 interfaces provided by the OptiX Metro 500.

Table 23 Input jitter tolera nce of the STM-1 interface

Jitter tolerance

Specification requirements (UI) STM level Jitter frequency f1 Jitter frequency f2 Jitter

frequency f3 Jitterfrequency f4

STM-1 G.958 G.958 G.958 G.958

Table 24 Frequency justif ication column width of jitter measurement filter

STM level f1 (Hz) f2 (kHz) f3 (kHz) f4 (MHz)

STM-1 500 6.5 65 1.3

3. Input jitter and wander tolerances of the PDH tributary interface

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OptiX Metro 50UltralCompact STM-1 Multi-Service Transmission Platform System Description Table 25 Input jitter tolera nce of the PDH tributary interface

Jitter tolerance

Specification requirements (UI) Tributary

rate

(kbit/s) Jitter

frequency f1 Jitterfrequency f2 Jitterfrequency f3 Jitterfrequency f4

2048 G.958 template G.958 template G.958 template G.958 template

Table 26 Frequency of jit ter measurement filter

Tributary

rate (kbit/s) f1 (Hz) f2 (kHz) f3 (kHz) f4 (kHz)

2048 20 2.4 18 100

4. Mapping jitter of the PDH tributary interface

Table 27 shows indices for the mapping jitter of the PDH tributary interfaces provided by the OptiX Metro 500.

Table 27 Mapping jitter o f the PDH tributary interface

Mapping Jitter (UIp-p) Specification requirements Electrical interface

type

B1 (f1~f4) B2 (f3~f4)

2048kbit/s Needs further study 0.075

5. Combined jitter of PDH tributary interface

Table 28 shows indices for the combined jitter of the PDH tributary interfaces provided by the OptiX Metro 500.

Table 28 Combined jitter of PDH tributary interface

Reverse polarity single

pointer (Uip-p) Regular Pointers (Uip-p)

Electrical

interface type _B1 _B2 _B1 _B2

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Technical Specifications Multi-Service Transmission PlatformSystem Description Table 29 Combined jitter of PDH tributary interface

Regular pointers with one

missing pointer (Uip-p) Reverse polarity doublepointer (Uip-p) Electrical

interface type _B1 _B2 _B1 _B2

2048kbit/s 0.4 0.075 0.4 0.075

2.5 Electromagnetic Compatibility (EMC) Test

Specifications

OptiX Metro 500 is designed on the basis of ETS EN 300386 series recommendations brought forward by European Telecommunications

Standardization Institute (ETSI). Table 30 shows EMC-related test indices of the OptiX Metro 500.

Table 30 Results of EMC test

Test Item Test standard Test result

Conducted emission EN55022 Class A Passed

Radiated emission EN55022 Class A Passed

Electrostatic discharge IEC1000-4-2 (Air discharge:8kV; Contact discharge:8kV)

Passed

Immunity to radiated

electromagnetic fields IEC1000-4-3 (10V/m) Passed

Electrical transient/Burst IEC1000-4-4 (2kV) Passed

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10 Terms and Abbreviations

Abbreviations and

Acronyms Full name

ADM Add/Drop Multiplexer

AIS Alarm Indication Signal

APS Automatic Protection Switching

ATM Asynchronous Transfer Mode

AU Administrative Unit

AUG Administration Unit Group

BIOS Basic Input Output System

CMM Capability Maturity Model

DCC Data Communication Channel

DDF Digital distribution frame

DWDM NE Dense Wavelength Division Multiplexing

ECC Embedded Control Channel

EMC Electromagnetic Compatibility

ETSI European Telecommunication Standards Institute

GSM Global System for Mobile Communication

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Terms and Abbreviations Multi-Service Transmission PlatformSystem Description

Abbreviations and

Acronyms Full name

HDB3 High Density Bipolar of order 3 code

IC Integrated Circuit

ITU-T Telecommunication Sector

MADM Multiple

MLM Multi Longitudinal Mode

MSTP Multi-service Transmission Platform

NE Network Element

OAM Operation, Administration and Maintenance

OAM&P Operation, Administration, Maintenance and Provisioning

ODF Optical Distribution Frame

PDH Plesiochronous Digital Hierarchy

RMS Root Mean Square

SDH Synchronous Digital Hierarchy

SLM Signle Longitudinal Mode

STM Synchronous Transport Module

TM Termination Multiplexer

TMN Telecommunication Management Network

OptiX Metro 500 System Description

HUAWEI

®

OptiX Metro 500 Ultra

Compact STM-1 Multi-Service Transmission Platform

System Description

Platform

System Description

Huawei Technologies Co., Ltd.

2

About This Manual

Purpose of This Manual

Target Readers

Brief Introduction

Contents

1

Brief Introduction

2

Characteristics of OptiX Metro 500

3

Networking Application

4

System Architecture

Contents

5

Reliability Design

6

Operation, Administration and Maintenance

7

Technical Specifications

Contents

3

Introduction

1

Overview

2

Application

4

Features and Functions

1

Features

2

Functions

5

Networking Application

6

System Architecture

1

Functional Modules

1.1 Line Unit

1.2 Tributary Unit

1.3 Cross-Connect Unit

1.4 SCC Unit

1.5 Clock Unit

1.6 Orderwire Unit

2

Hardware Structure

2.1 Equipment Box

3

Software Structure

3.1 NE Software

3.2 NM System

7

Reliability Design

1

Redundancy and Protection

1.1 1+1 Redundancy Hot Backup Protection for

Power Supply

1.2 Protection in Abnormal Conditions

1.3 Software Fault-Tolerance

1.4 Data Security

2

Network Protection

2.1 Two-fiber Unidirectional Path Protection

Ring

2.2 Two-fiber Bidirectional Path Protection

Ring

8

Operation, Administration and

Maintenance