The Tenor AXT800 VoIP Trunk Gateway are designed for small Service Providers who need to interface their VoIP infrastructure with the Public Switched Telephone Network . * Twenty four channel VoIP Trunk Gateway with twenty four analog FXO ports, and one 10/100 Ethernet port. * Supports a network of up to four Tenor switches without a gatekeeper. * Supports up to sixteen simultaneous voice calls over the IP network.