Global Tech GT-SDH-155A 63E1 SDH is the 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)

* Engineering Order Wire (EOW) interface: PHONE (RJ11 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 RS23