... access device,FXS,FXO,E&M,MS,MSA,HFA optional;V.35,V.24,X.50,RS485,RS422,G.703,UIF(ISDN ... &M,8*MS,8*MSA,4*HFA optionalData:4*V.35,10*V.24,10*X.50,4*RS485,4*RS422,8 ... -pole-trigger fee-charge function and hotline telephone;Supporting U interface: V.35, V.24 and Ethernet data can be transmitted over five ...