... (32FXS) is a versatile IP-based voice and fax gateway. It is highly integrated router, NAT, phone gateway functionality and has market ... the mainstream SIP proxy servers(such as Asterisk, SIP registration server, etc. ) to implement docking. Run in a variety of ... attended call transfer, Call forward, Do not disturbQosDiff Serve, TOS, 802.1P/Q VLAN taggingNetwork ProtocolsTCP/UDP,RTP/RTCP,HTTP,ARP ...