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MEGSM-155SA 63E1 compact SDH transmission


MEGSM-155SA 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-topoint, ring and chain transmission network.



  • 1U height, 19 Inch width standard

Service interface

  • STM-1 optical interface, SFP optical module (LC connector)
  • 63 E1 interfaces compliant with ITU-T G.703, optional unbalanced/ balanced interface

System interface

  • Ethernet management interface and RS232 management interface (RJ45 connector)management interface
  • External synchronization interface (RJ45 connector)user channel interface (RJ45 connector)
  • Order Wire (EOW) interface(RJ11 connector)and DALM output interface (DB9 connector)

Timing mode
STM-1 line timing (T1)timing from E1 1 to E1 63 (T2)timing source(T3/T4),2.048Mb/s by default and 2.048MHz selectableG.813 internal oscillatortiming source can be auto-switched according to SSM or operator settings1+1 protection and Automatic Protect Switch (APS) with the switching time less than 50msRemote power Down Detection (RPD) and Auto Laser Shutdown (ALS)embedded BERT and various loop back for troubleshootingfirmware download locally without disturbance of existing traffic

NE management

  • Supports NE management based on CLI command via RS232 interface or TELNET
  • Network management based on PC via unified platform
  • hot-spare power cards, both 220V AC and -48VDC available,
  • power consumption less than 25W

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