CCOM Communication

Centralized SDH Optical Transmission system
OTS-155C

OTS-155C is a STM-1 optical transmission system, whose technical performances are fully complied with ITU-T and ETSI standards. This system has multiple155.52Mb/s optical interfaces, complete synchronous timing features, as well as a powerful non-block TU cross connection matrix. It can be used for building point to point, chain, star and ring networks, with SNCP features, serving departments of telecommunications, traffic, energy resources, etc.

Features
OTS-155C system is divided into two major parts of hardware system and software network management platform; features of hardware system are as follows:
> 6-optical-port, STM-1rate MADM or TM multiplexing equipment;
> Support up to 23*E1 up/down;
> Provide Ethernet access of channelized E1 and shared-DS3;
> Support cross connection of all VC-12 and VC-3;
> Support SETS. It is possible to choose tracking optical circuit timing
   source or external synchronization input, provide synchronization output,
   and automatically handle timing source rearrangement according to failure
   information or SSM;
> Support channel protection and SNCP, protection rearrangement time is
   shorter than international standard;
> EOW system realized in whole hardware supports site selection for calling
   and conference, up to 99 station.

Benefit
As an cross MUX, acts as the transmission network hinge, it can provide up to 6*155.52Mb/s optical interfaces and 210*E1 for multiplexing. High-order and low-order tributaries can all realize non-blocking cross-assignment.
As a TM, acts as the module of a large switcher, it can multiplex 231*E1 and provide 1+1 channel backup for each E1.
As an optical Ethernet bridge, acts as a centralized access equipment MAN, realizing remote connection of 88 pairs of 10M Ethernet through E1 channels.
As a regenerator, it can provide direct connection of 3*155.52Mb/s(VC4) optical links, extending the transmission distance.

Network Management
> The network management system includes centralized network management and local management terminal.
   It is based on CCVIEW-SDH network management platform. CCVIEW-SDH is designed based on ITU-T
   related recommendations, so as to realize network resources, configuration, alarms, performance and
   security management. It has following features:
> Local NMS by 10/100Base-T port or RS232 serial port;
> Based on PC, can manage multiple subnet with separated optical routes, realizing internet-based
  remote network management;
> Based on TCP/IP, support remote-controlled embedded software online upgrading without impacting
  business operations, has good expansibility;
> Friendly human-computer interaction, clear interface interleaving mode, and operator-oriented optimized design;
> Provide voice alarm tips, simplified equipment alarm display, convenient for application and maintenance;
> Use NVRAM to record the alarm and even log.

Typical Application
OTS-155C can be used for building point-to-point, chain, star of ring network, with SNCP features, serving departments of Telecom, Traffic or Energy industry, etc.



Technical Specification

Data Summary

Dimension

481mm(L)×374mm(W)×298mm(H)

Weight

10.85Kg(Fully equipped)

Supply voltage

-48VDC±10%

Power consumption

70W±10%( Fully equipped, The spare power unit is optional)

Operation temperature

0℃-45℃

Humidity

≤90% (free from condensing)

Atmospheric pressure

70-106Kpa

Storage temperature

-20℃-70℃

Environment

Free from corrosive gas and soluble gas, or dust nuisance, without strong electromagnetic field in the vicinity.

Interface characters
STM-1 optical interface

Bit Rate

155.520Mb/s±4.6ppm

Code pattern

NRZ

Standard

ITU-T G.957/G.958

Media type

ITU-T G.652/G.653, single mode

Work wavelength

1310nm (1550nm is optional, declare when ordering)

Relay-free transmission distance

50Km (70~100Km is optional, declare when ordering)

Sensitivity

≥-36dB

Adaptation

FC (SC is optional, declare when ordering)

Interface

S-1.1

E1 Tributary interfaces

Bit Rate

2.048Mb/s±50ppm

Code pattern

HDB3

Standard

ITU-T G.703

Connector

2mm high density connector

Impedance

75Ω Un-balanced (120 Ωbalanced is optional)

Jitter

Comply with ITU-T G. 823

SETS interfaces

Standard

Comply with ITU-T G.813/783

Input

T1, T2, T3

Output

T4

Function

Support SSM, working in tracing、holding or free run mode

Card Introduction
General management card

Serial Name

Card Type

Description

Comments

General management card

DMU

System managment

Being Insertted in the 3rdslot

Optical line card

Serial Name

Card Type

Description

Comments

Optical line card

DO1

Provide 2 STM-1 ports, FC connector (SC is optional)

Being Insertted in the 1st, 2nd or 4thslot

E1 service card

Serial Name

Card Type

Description

Comments

8 E1 service card

2MM8

8×E1 ports service card，75Ω，2mm high density E1 interface

Dedicated 2mm line

21 E1 service card

2MM21

21×E1 ports service card，75Ω，2mm high density E1 interface

Dedicated 2mm line

Ethernet service cards

Serial Name

Card Type

Description

Comments

1xE1 Ethernet service card

ETM2

1xE1 Ethernet service card, , 8 Ethernet port, Transmission Bandwidth for each port is 2M

Must operate along with E1-Ethernet converter based on RC7221chip in the remote side