... ,HFA optional;V.35,V.24,X.50,RS485,RS422,G.703,UIF(ISDN 2B+D) 10Base-T 64*E1Total 16*slot-2 ... ,4*HFA optionalData:4*V.35,10*V.24,10*X.50,4*RS485,4*RS422,8*G.703,4*UIF ... (ISDN 2B+D),4*10Base-T optionalSupport work under standard DXC mode(E1 Digital Cross ... to guarantee stability and reliability;2M interface board and other sub-rate interface board can be inserted into any slot of ...