OSN 2500 Product Documentation

sumon_ahsan  Diamond  (1)
5 years 3 months ago  View: 2607  Reply: 22

“OSN 2500 Product Documentation” is used by our operational & maintenance colleagues every day for daily configuration, maintenance, troubleshooting and performance management activities.

Link to the library ::   http://support.huawei.com/hdx/hdx.do?docid=SE0000746312&lang=en

Highlights of the Library:

The library has below basic contents:

Product Description:

The OptiX OSN 2500 intelligent optical transmission system (hereinafter referred to as the OptiX OSN 2500) developed by Huawei is the next-generation intelligent optical transmission equipment.

The OptiX OSN 2500 integrates the following technologies to transmit voice and data services on the same platform with high efficiency:

  • Synchronous digital hierarchy (SDH)
  • Plesiochronous digital hierarchy (PDH)
  • Ethernet
  • RPR(Resilient Packet Ring)
  • Asynchronous transfer mode (ATM)
  • Storage area network (SAN)
  • Wavelength division multiplexing (WDM)
  • Digital data network (DDN)
  • Automatically switched optical network (ASON)
  • Microwave Technology
Appearance of the OptiX OSN 2500 

The OptiX OSN 2500 is used at the access layer and the convergence layer of a metropolitan area network (MAN). The OptiX OSN 2500 can also be networked with the following equipment to optimize the investment for customers:

  • OptiX OSN 9500
  • OptiX OSN 7500
  • OptiX OSN 3500
  • OptiX OSN 3500 II
  • OptiX OSN 2500 REG
  • OptiX OSN 1500
  • OptiX 2500+(Metro 3000)
  • OptiX 155/622H(Metro 1000)

Network application of the OptiX OSN 2500 


Software Architecture: 

The software system is of a modular design. Each module provides specific functions and works with other modules.

The entire software is distributed in three modules including board software, NE software and NM system.

The software resides respectively on functional boards, the SCC, and NM computer. Hierarchical structure ensures that it is highly reliable and efficient. Each layer performs specific functions and provides service for the upper layer.

The system software architecture is shown in below.

In the diagram, all modules are NE software except "Network Management System" and "Board Software".

Software architecture with the ASON feature 

Communication Protocols:

Complete protocol stack and messages of Qx interface are described in ITU-T G.773, Q.811 and Q.812.

Qx interface is mainly used to connect mediation device (MD), Q adaptation (QA) and NE (NE) equipment through local communication network (LCN).

At present, QA is provided by NE management layer. MD and operating system (OS) are provided by NM layer. They are connected to each other through Qx interface.

According to the Recommendations, Qx interface provided by the system is developed on the basis of TCP/IP connectionless network layer service (CLNS1) protocol stack.

In addition, to support remote access of the NM through Modem, IP layer uses serial line internet protocol (SLIP).

Board Software:

The board software runs on each board and it manages, monitors and controls the operation of the board.

It receives the command issued from the NE software and reports the board status to the NE software through performance events and alarm.

The specific functions include:

  • Alarm management
  • Performance management
  • Configuration management
  • Communication management

It directly controls the functional circuits in corresponding boards and implements ITU-T compliant specific functions of the NE.

NE Software

The NE software manages, monitors and controls the board operations in the NE. In addition, the NE software functions as a communication service unit between the T2000 and the boards, so that the T2000 can control and manage the NE.

According to ITU-T M.3010, NE software is at unit management layer in telecom management network, performing NE function (NEF), partial mediation function (MF) and OS function at network unit layer.

Data communication function (DCF) provides communication channel between NE and other equipment (including NM and other NEs).

Network Management System:

The NM system implements a unified management over the optical transmission network, and maintains all OSN, SDH, Metro, DWDM NE equipment in the network.

In compliance with ITU-T Recommendations, it is an NM system that integrates standard management information model as well as object-oriented management technology.

It exchanges information with the NE software through the communication module to monitor and manage the network equipment.

The NM software runs on a workstation or PC, managing the equipment and the transmission network to help to operate, maintain and manage the transmission equipment.

ASON Software

According to the ITU-T Recommendations, an automatically switched optical network (ASON) includes three planes: control plane, management plane, and transport plane.

The management plane refers to an upper layer management system such as the T2000. The transport plane refers to a traditional SDH network. The control plane is where the ASON software is applied, and uses the LMP (link management protocol), OSPF-TE (open shortest path first- traffic engineering), and RSVP-TE (reservation protocol-traffic engineering) protocols.

Below shows the ASON software architecture. The ASON software mainly includes the link management module, the signaling module, the routing module, and the cross-connection management module.

ASON software architecture:

Link Management Module

By using the LMP protocol, the link management module provides the following functions:

  • Create and maintain control channels.
  • Verify member links and TE links.

Signaling Module

By using the RSVP-TE protocol, the signaling module provides the following functions:

  • Set up or interrupt service connections according to user requests.
  • Synchronize and restore services on the basis of service status changes.

Routing Module

By using the OSPF-TE protocol, the routing module provides the following functions:

  • Collect and flood the TE link information.
  • Collect and flood the control link information of the control plane.
  • Compute service trails and control the routing.

Cross-Connection Management Module

The cross-connection management module provides the following functions:

  • Create and delete cross-connections.
  • Report link status, alarms, and other relevant information.

Installation & Commissioning:

Subrack Combination in One Cabinet

The OSN product series encompass the OptiX OSN 7500, OptiX OSN 3500, OptiX OSN 3500 II, OptiX OSN 2500, OptiX OSN 2500 REG, and OptiX OSN 1500 (including 1500A and 1500B).

Meter high cabinet, for example, the typical subrack combination is as follows:

Combining the OptiX OSN product series in one cabinet
Scenario Type of the Subrack Combined in One Cabinet Number of Subracks Combined in One Cabinet
1 OptiX OSN 7500 1
OptiX OSN 3500 1
2 OptiX OSN 7500 1
OptiX OSN 3500 II 1
3 OptiX OSN 7500 1
OptiX OSN 2500 1
4 OptiX OSN 7500 1
OptiX OSN 1500A/OptiX OSN 1500B 1 to 3
5 OptiX OSN 3500 1
OptiX OSN 2500 1
6 OptiX OSN 3500 1
OptiX OSN 1500A/OptiX OSN 1500B 1 to 3
7 OptiX OSN 3500 II 1
OptiX OSN 2500 1
8 OptiX OSN 3500 II 1
OptiX OSN 1500A/OptiX OSN 1500B 1 to 3
9 OptiX OSN 2500 1
OptiX OSN 1500A/OptiX OSN 1500B 1 to 3
10 OptiX OSN 7500 II 1
OptiX OSN 7500 1
11 OptiX OSN 7500 II 1
OptiX OSN 3500 1

Maintenance and Fault Management

This topic introduces the documents that are associated with the routine maintenance of the OptiX OSN equipment.

  • Routine Maintenance
    The Routine Maintenance describes the operations of the routine maintenance in terms of purposes, cycles, criteria, and procedure.
  • Security Configuration, Maintenance, and Hardening
    This document describes the configuration, hardening, and routine maintenance of the equipment.
  • Alarm and Events Handling
    This document describes the alarms and the performance events of the OptiX OSN equipment in terms of generation principles, classification list, and handling methods.
  • Troubleshooting
    Based on various services of the OptiX OSN equipment, this document describes the troubleshooting process, which involves background knowledge, information collection, general processing flow, common troubleshooting methods, and case study.
  • Troubleshooting Cases
    The Troubleshooting Cases provides actual project maintenance cases, classified by products, classified by faults, classified by alarms, and classified by functions and features.
  • Parts Replacement
    The Parts Replacement describes the matters for attention during the replacement of boards.

Issues with the Library:

I didnt  find any issue with the library. It is absolutely perfect from operators’ point of view...

w00141785  Gold 
5 years 3 months ago

Many thanks Ahsan:) 


akmshahislam  Gold 
5 years 3 months ago
very good writing...
akmshahislam  Gold 
5 years 3 months ago
I like it very much...
akmshahislam  Gold 
5 years 3 months ago
You should get reward point for this...
akmshahislam  Gold 
5 years 3 months ago
It will be very helpful for my works... 
akmshahislam  Gold 
5 years 3 months ago
very informative & effective...
akmshahislam  Gold 
5 years 3 months ago
it will enhance my knowledge...
akmshahislam  Gold 
5 years 3 months ago
I highly appreciate your post...
swaheed  Gold 
5 years 3 months ago
very good writing...