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* Digital E1: unframed, fractional, channelized TDM and ATM with IMA (up to 8 E1s) interfaces:- E1 line type : G.703/G.704 with or without CRC4 & MF
- E1 encoding: HDB3, AMI, NRZ, NRZi, 75 or 120 Ohms
- NFAS, AIS and RDI bits/alarm relay
- Balanced 120 Ohms (RJ21) or Unbalanced 75 Ohms (BT43) connectors
* STM-1 ATM or SDH channelized VC12 interface [supports ATM IMA VC12], SFP connector
* STM-4 ATM or SDH channelized VC12 interface [supports ATM IMA VC12], SFP connector
* RS232 Serial craft interface
* Optional: VDSL / ADSL2+ line modem
