*Provider 4 slots for modules and 4*10/100M Ethernet interfaces
*Various functional modules:E1,V.35,FXO/FXS,RS232/RS485,Ethernet, order wire module, NM module, alarm output terminal module
*Flexible configuration: 4/8E1
*Support ALS (Automatic Laser Shutdown) function
*Double optical port optional for 1+1 protection
*Support the local/remote E1 loop back
*SNMP with NM interface (RS485) via external management agent
*Power supply: DC -48V, AC 220V, DC -48V & AC 220V
*Provide with remote failure alarm detecting function (optional)
*Comprehensive LED indicators on front panel, convenient for the diagnosis of equipment
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