... , recent calls, recorder, alarm clock. The Kasda MGCP and SIP IP phones are both based on standards and fully co-work with ... easier to carry and easy to use. Protocols supported : MGCP,SIP, RTP/RTCP, DHCP, SDP, TCP/IP, PPPoE, NAT, SNTP, Bridge ... 158°F)¡Relative humidity: 10% to 90% Protocols supported : MGCP,SIP, RTP/RTCP, DHCP, SDP, TCP/IP, PPPoE, NAT, SNTP, Bridge ...