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 RS232 interface or TELNET

* Supports Network management based on PC via unified platform: GTVIEW

* 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

Technical Parameter

System Fabric

* Cross Connect: 4* 4 VC-4

   Optical Interface

* Optical Port: S1.1, L1.1, L1.2

* Connector: SC, FC

* Wavelength: 1310nm, 1550nm

* Coding: NRZ

* Max. Spectrum Width(RMS): G.957

* Max. Tx Power: -8/ 0dBm

* Min. Tx Power: -13/ -5dBm

* Extinction: 8.2/ 10dB

* Rx Sensitivity: -28/ -34dBm, BER 10-10

* Rx Overload: -8/ -10dBm, BER 10-10

   E1 Interface

* Coding: HDB3

* Bit Rate: 2.048Mb/s + 50ppm

* Connector: BNC (75Ω) / RJ45 (120Ω)

* Standard:ITU-T G.703,G.704,G.823

   ETS/EXM interface

* Line Clock: E1, STM-1 Optical Link

* Internal Clock: Internal Oscillator

* Bit rate:2.048Mb/s±50ppm

* Impedance: 120Ω balanced

   Ethernet management interface(EMU)

* Bit rate: 100Mb/s

* Connector: RJ45    

   Operation Environment

* Working Temperature: -10C~ 70C

* Storage Temperature: -40C~ 85C

* Relative Humidity: 5%~ 95%, non-condensing

* No corrosive and solvent gas, no dust and heavy EMI

* Power Supply: AC 220V, DC -48V

* Power consumption: 25W±10%

* Physical Dimension: 484mm×44mm×255mm (width ×height ×depth)