Overview

BH-SDH155A2 is the 63E1 compact STM-1 level Synchronous Digital Hierarchy (SDH) transmission system compatible with ITU-T standard. It is designed as a modular system with two 155.520Mb/s optical interfaces to provide an ultra-compact, cost-effective and high capacity platform. It provides fully cross-connect between all tributaries, and can be used as Terminal Multiplexer (TM) or an Add-Drop-Multiplexer (ADM) to build point-to-point, ring and chain transmission network.

Feature

Achieve Multiplexing from 63 E1 to 2 STM-1 optical interfaces

1U height, 19 Inch width standard

Service interface

Two STM-1 optical interfaces, SFP optical module (LC connector)

Maximum 63 E1 interfaces compliant with ITU-T G.703, optional unbalanced/ balanced interface

System interface

· Ethernet management interface: EMU (RJ45 connector)

· RS232 network management interface: CONSOLE (RJ45 connector)

· RS232 user channel interface: RS232 (RJ45 connector)

· External synchronization interface / Extendable management interface : ETS1/EXM1, ETS2/EXM2 (RJ45 connector)

· UALM and DALM output interface: U/DALMO (DB9 connector)

Timing mode

STM-1 line timing (T11,T12)

Tributary timing from E1-1 to E1-63 (T2)

External timing source input (T31/T32), 2048Kbit/s by default and 2048KHz selectable

External timing output (T41/T42), 2048Kbit/s by default and 2048KHz selectable

ITU-T G.813 internal oscillator

The timing source can be auto-switched according to SSM or operator settings

Supports 1+1 protection and Automatic Protect Switch (APS) with the switching time less than 50ms

Supports Remote power Down Detection (RPD) and Auto Laser Shutdown (ALS)

Supports embedded BERT and various loop back for troubleshooting

Highly efficient management system

Supports NE management based on CLI command via RS232 interface or TELNET

Supports Network management based on PC via unified platform: NMVIEW

Supports three network management types: Traditional DCC management, Inner DCN management (by some VC12 channel) and outer DCN management (by E1 cable via outer EXM interface).

Power system

Two backup power supply

220V AC or-48V DC single power

-48V DC & 220V AC double power

-48V DC & -48V DC double power

220V AC & 220V AC double power

Power consumption less than 25W

Application

BH-SDH155A2 can be used as Terminal Multiplexer (TM) or an Add-Drop-Multiplexer (ADM) to build a point-to-point, ring or chain transmission network. As following figures shows: