... Router Enclosure Type Desktop Connectivity Technology Wired Data Link Protocol Ethernet, Fast Ethernet Network / Transport Protocol TCP/IP, PPTP, UDP/IP, L2TP, ... .1p Status Indicators Power, phone, WAN VoIP Functionality VoIP phone adapter VoIP Protocols SIP, SIP v2, RTCP, RTP, SRTP Voice ... ¦ Phone line : 2 x FXS - RJ-11 Power Device Power adapter - external Voltage Required AC 120/230 V ( 50/60 Hz ...