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Huawei Sdh Optix Osn550 Sdh Over Ethernet Equipment

OptiX OSN550 optical terminal (OSN550) is a new generation of multi service CPE optical transmission system for packet (Packet Transport Network) and TDM (Time Division Multiplexing). It is an input layer device in the end to end products of HUAWEI. It ha

The OptiX OSN550 Optical Multiplexer supports MPLS (Multi-Protocol Label Switching)/MPLS-Transport (MPLS-Transport Profile)/PWE3/Ethernet/ATM/WDM/SDH/PDH technologies. It can flexibly implement a pure TDM mode, a pure packet mode, or a Hybrid mode group. network. The OptiX OSN550 transmission equipment is mainly applied at the access layer of the network and is connected to the Huawei OptiX OSN1500/OSN2500/OSN3500 series equipment end-to-end network to provide a complete solution from the backbone layer, convergence layer, and access layer to 2G/3G. / LTE base station backhaul, application requirements for large customer dedicated line access.

Large capacity, high availability, low energy consumption and compact structure.

OptiX OSN550, as an access layer device in OSN series products, has the characteristics of large capacity, high availability, low energy consumption and compact structure.

The maximum 64Gbit/s packet switching capacity and the maximum 20Gbit/s SDH cross capacity can reach the 4 10GE interfaces at the same time.

Support for master, crossover, clock, power unit 1+1 device level protection, support for E1/T1 TPS protection. It supports network protection such as Tunnel APS, PW APS, MSTP, ERPS, LAG, LPT, ML-PPP, LMSP, MRPS, LMSP, multiplexing section, and improves the reliability of the equipment.

The maximum power consumption is 300W, the typical power consumption of Hybrid is only 175.5W, and the typical power consumption of TDM is only 107.3W.

Compact structure and high integration, the size is only 442mm (wide) x 220mm (deep) * 88mm (high).

"Unified exchange" architecture, multi business consideration

HUAWEI OSN550 devices are based on the "unified exchange" architecture. Support the traditional TDM and packet dual domain coexistence of business carrying mode, to meet the demand configuration and application of pure TDM services and packet services, and to realize the smooth evolution of the TDM domain into the packet domain.

HUAWEI OSN550 devices support the access and transmission of PDH/SDH/ATM/Ethernet/MPLS/MPLS-TP services to meet multiple business applications.

HUAWEI OSN550 equipment uses packet transmission technology to achieve efficient statistical reuse of data services, effectively reduce the transmission costs of every bit service; meanwhile, inherit the advantages of SDH, provide Native bearing to TDM services, and effectively ensure the high quality of voice service transmission.

End to end business configuration / one button metering / one button fault location (TP-Assist)

Compared with the traditional TDM network, packet network operation and maintenance have the following characteristics:

The packet network does not have the TDM network's perfect overhead bytes to indicate the physical state of the network. When the network fails, it lacks the direct and quick fault location indication information.

The diversity and technical complexity of networking have put forward higher requirements for operation and maintenance capabilities.

In order to solve the above problems in the packet network, the OSN550 device enhanced the means of operation and maintenance and simplified operation and maintenance by supporting the TP assistant (TP-Assist) in installation, service configuration, fault location, routine maintenance and so on. The packet network has the ability to operate and maintain similar to the SDH, and reduces the technology for the operation and maintenance personnel. It can be required to improve the efficiency of operation and maintenance.

Networking Scheme

When there is a large number of Ethernet services and a small number of E1 services, a pure packet networking scheme is adopted to give full play to the advantages of PTN technology for large flow and low cost transmission, to meet the needs of multi service operation and to improve the cost performance of network construction and maintenance.

Large granular FE/GE business YISHION packet transmission through the PTN network, can greatly reduce the transmission cost per bit.

The small granular E1 service can be transmitted through PTN network in TDM/ATM PWE3 mode, which can meet the E1 business requirement without TDM network.

OptiX OSN 550 product appearance and specifications




Product Appearance



The number of slots that can be placed on the service board

DC Box: 6 (without master switch clock board)/8 (with master switch clock board)


AC box: 4 (excluding the master switching clock board)/6 (including the master switching clock board)

Device Capacity


Grouping capacity of 64 Gbit/s

TDM 20Gbit/s high-end capacity, 5Gbit/s low-end capacity

Supported Business Types

SDH, PDH, ATM/IMA, CES, Ethernet and others

Network Topologies

Point to point, chain, star, ring, ring chain, ring intersection, tangent ring

Backup and Protection

Network-level protection (grouping) Tunnel 1:1 APS, PW 1:1 APS/FPS, Packet Linear Multiplex Section Protection, LPT, LAG, MSTP, MRPS, ML-PPP, ERPS Td>     
Network-Level Protection (TDM)

SDH protection: linear multiplex section protection, ring multiplex section protection, SNCP



Device Level Protection

E1/T1 TPS Protection


Power 1+1 Backup


Master Cross Clock Unit 1+1 Protection


Supports fan protection (If a single fan fails, it will not affect the normal operation of other fans)

Maintenance MPLS OAM Support CV, FFD, BDI, FDI, Ping, Traceroute

Supports CC, RDI, AIS, LB, LT, LM (single-ended LMs that only support PW), DM (two-way DM only), LCK (LCK supporting PW and bidirectional tunnel), TST (supporting only packet loss test), CSF (only supporting PW CSF)

ETH OAM(Grouping)

Ethernet Services OAM: CC, LB, LT, AIS, LM (Single-ended LM only), DM (Two-way DM only), RDI


Ethernet Port OAM: Supports OAM auto discovery, link performance monitoring, remote loopback, fault detection, and loop detection


Ethernet Services OAM: Supports CC, LB, LT, OAM_Ping


Ethernet Port OAM: Supports OAM auto discovery, link performance monitoring, remote loopback, fault detection, and loop detection

Sync Grouping

SDH Physical Layer Clock


Sync Ethernet Clock


IEEE 1588v2






SDH Physical Layer Clock


Synchronous Ethernet Clock

DCN Out-of-band DCN HWECC, IP over DCC, OSI over DCC
In-band DCN Supports HWECC, IP

Service Configuration: Supporting End-to-End Service Configuration, Alarm Deployment with Service


Business commissioning: support for one-button business continuity testing, one-click business performance testing, automatic meter-free testing


Operating and Maintaining: Supporting Performance Statistics and Monitoring, and Specialized/Special Network Service Path Visualization


Fault Location: Supports intelligent fault location, IP Ping initiation and response, and service loopback detection

Standard operating voltage

-48V/-60V DC Power Input


110V/220V AC Power Input

Installation Rack Mounting (Including ETSI Cabinets and 19" Cabinets), Wall Mounting, Desktop Mounting, Outdoor Cabinet Mounting, Open Rack Mounting
Equipment Operating Environment Subrack temperature

Long-term: -5°C to 55°C


Expansion: -5°C to 65°C

Subrack Relative Humidity

Long-term: 5% to 85%


Short term: 5% to 95%

Reliability Indicators System Availability 0.999996848
Annual Average Repair Rate less than 1.5%
MTTR (System Average Repair Time) 1 hour
MTBF (System Average Interval Time) 36.22