1)Combined with E1, FXO/FXS access port; 2)4~100 E1, 192 FXO/FXS; 3)Support SS7, PRI, R2, V5.2 signaling; 4)PABX function; Description:NC-AD300X Programmable PABX is designed and manufactured by Nice Communication, with its plug-in module structure, combined with E1, FXO and FXS access port, can flexible configured for different requirement, also NC-AD300X provide CTI control interface, ...