... 64*E1 integrated data access device,FXS,FXO,E&M,MS,MSA,HFA optional;V.35,V.24,X.50,RS485,RS422, ... slotsVoice:16*FXS,16*FXO,8*E&M,8*MS,8*MSA,4*HFA optionalData:4*V.35,10*V.24 ... signals from different source can be led into different channels of the same interface board;1+1 Hot backup for ... sub-rate interface board can be inserted into any slot of the device at any sequence or types;SNMP Network Management ...