... (32FXS) is a versatile IP-based voice and fax gateway. It is highly integrated router, NAT, ... Anonymous call, Direct IP Call and Busy tone Fax over IP and Three –way conferences Multiple FXS ... , DND, busy tone, conference with IPPBX and Fax over IP.Be easy to configure and maintain:Customer ... Call display etc standard voice service and Busy tone, Fax over IP, Three-way conference . Support PPPoE client ...