The MyPBX U100 is a 1U rackmount VoIP PBX for 100 users. The MyPBX U100 support up to 16 FXO, FXS & ISDN ports, up to 8 GSM & UMTS ports, can connect VoIP trunks and has audio input and output connections. Speed, stability and compatibility combined with rich functionality make the MyPBX U100 more than capable of running your business communication.