Telephony Modules for IP-PBX and Astribank Xorcom products are modular and support all the common telephony lines and trunks. Xorcom IP PBX IP PBX Products Telephony Interface Modules E1 / T1 PRI Telephony Interface Module 8 FXS, I/O Telephony Line Interface Module BRI ISDN Telephony Interface Module 6 FXS, 2 FXO Telephony Line Interface Module FXO Telephony Trunk Interface Module 6 FXS, 2 FXO / IO Telephony Line Interface Module 8 FXS Telephony Line Interface Module 2 FXS, 6 FXO Telephony Line Interface Module Get a quote