... ,HFA optional;V.35,V.24,X.50,RS485,RS422,G.703,UIF(ISDN 2B+D) 10Base-T 64*E1Total 16 ... *V.24,10*X.50,4*RS485,4*RS422,8*G.703,4*UIF(ISDN 2B+D),4*10Base-T optionalSupport ... the ISDN 2B+D Data interface board;Possessing 10Base-T Ethernet bridge which supports VLAN transparent cutting through;Powerful time slots expansion ...