linksys spa122 phone adapter : 1.Device Type:Router 2.Interfaces :2RJ45,2RJ11 ... 1p Status Indicators Power, phone, WAN VoIP Functionality VoIP phone adapter VoIP Protocols SIP, SIP v2, RTCP, RTP, SRTP ... line : 2 x FXS - RJ-11 Power Device Power adapter - external Voltage Required AC 120/230 V ( 50/60 ... 1 x network cable - 6 ft Compliant Standards FCC Class B certified, CE, ETSI, UL, ICES-003, RoHS, A ...