SDH Optical Terminal with STM-1/STM-4

Main Features

World leading design adopts independent Asics, with 2U compact structure, high reliability, low power consumption

Compliant to ITU-T relative recommendations and SDH technical criteria.

Providing ***8×***8 VC*2, *8×*8 VC3, *6×*6 VC4 non-blocking cross connection, and supporting unidirectional, bi-directional and broadcasting services

Supporting multiple network configurations: point to point, chain, ring, star, tree, multi-ring, ring crossing, etc

 Providing sub-network connection protection and 1*1 multiplex section protection.

 Providing multiple service interfaces of E1, T1, E3, DS3, STM*1o/e, STM*4, *0M/**0M Ethernet interfaces, etc

Providing virtual concatenation function for **0Base-T/**0Base-T2, and the maximum virtual concatenation quantity for VC3 is 3 and for VC*2 is *3.

Reserving 4 expansion slots for future service expansion.

Huge interface capacity: up to **8 T1 interfaces, up to **8 E1 interfaces, up to *2 E3 interfaces, up to *6 T3 interfaces, up to *6 **0Base-T interfaces, up to 4 STM*4 interfaces, up to *0 STM*1 interfaces;

Can realize independent service-assignment or mutual protection between two optical interfaces.

Can be configured as complicated SNCP network such as **2M***5M Multi-ring, **5M***5M Multi-ring, etc

Adopting SFP fiber module which supports hot plugging, having the capability of online upgrading STM*1 system to STM*4 system only by replacing interface modules

Providing timing synchronous interface, implementing switching of multiple timing sources like 2Mb/s, 2MHz, STM*1/STM*4, etc., and output of 2Mb/s, 2MHz reference clock, supporting SSM function.

Providing timing synchronous interface, implementing switching of multiple timing sources like 2Mb/s, 2MHz, STM*1/STM*4, etc., and output of 2Mb/s, 2MHz reference clock, supporting SSM function.

Providing F (Ethernet) and f (RS**2) NMS interface, the NMS can realize ITU-T recommendations five functions of resources, configuration, alarm, performance, and security, etc

Supporting software remote downloading, with software live-upgrading capability, being easy to maintain.

Supporting remote network management and remote monitoring

 Providing 8 ports for external alarms 4 ports for device alarms and a series of alarm ports.

Through replacing optical devices, supports ultra-long distance (≤*0km), long distance (≤*0km) and short distance (≤*0km) optical transmission

STM*1 optical interface

Bit Rate

**5.**0Mb/s±4.6ppm

Standard

ITU-T G.**7/G.**8

Wavelength:

***0nm /***0nm

Distance:

*0Km

Sensitivity:

Better than **8dB

Connector:

FC/SC

E1 interface

E1 interface

2.**8Mb/s±*0ppm

Encoding

HDB3

Standard

ITU-T G.**3

Impedance:

*5Ω/**0Ω

Jitter performance Comply ITU-T G. **3

Ethernet interface

Compatible to IEEE **2.3

Bit Rate:

*0M and **0M self adaptation.

Operating mode

full duplex and half duplex self adaptation.

Connector:

RJ*5

External timing source interface (REF)

Engineer Order Wire (EOW) interface

Standard:

ITU-T G.**3/**3

Bit Rate *4Kb/s

Input:

T1, T2, T3

Signal mode Dual tone multi-frequency dialing mode

Output:

T4

Ring frequency **0Hz

Working mode:

Support SSM, tracing, holding & free run

Ring mode Loudspeaker

Interface:

Micro-mini coaxial

NE address range *0~*9

NMS interface (RS***5) interface

Interface RJ**5

Audio interface

Compliant to ITU-T G.**1, G.**2, G.**3.