GM-901D supports SIP 2.0, with 1 FXS and 1PSTN ports. It also supports DHCP, router and T.38 fax. Product characteristic Standard SIP 2.0 terminal product, powerful applicability, and best for global popularizing; Support SIP 2.0, TCP/UDP/IP, RTP/RTCP, ICMP, ARP/RARP, NTP, PPP...
Products: voip wireless headset,
voip usb phone