OSN 2500 Product Documentation
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“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:
 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:
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:
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 ModuleBy using the LMP protocol, the link management module provides the following functions:
Signaling ModuleBy using the RSVP-TE protocol, the signaling module provides the following functions:
Routing ModuleBy using the OSPF-TE protocol, the routing module provides the following functions:
Cross-Connection Management ModuleThe cross-connection management module provides the following functions:
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
Maintenance and Fault Management
This topic introduces the documents that are associated with the routine maintenance of the OptiX OSN equipment.
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