The QX60 IP PBX is a full-featured IP PBX designed for offices with as many as 64 users. The QX60 can support up to 64 IP devices and 20 concurrent calls. SIP trunking allows the QX60 to connect directly to an ITSP with no additional equipment. The QX60 includes a firewall and SIP Intrusion Detection & Protection System for optimal security. E1, T1, FXO, and FXS ports can easily be provided using the Epygi QX Gateways.