Cisco SPA504G 4-Line IP Phone, PoE, (SPA504G)

Type of device: IP Phone Port WAN: N/A Port LAN: 2x 10/100BaseTX (RJ45) Number of supported VoIP lines: 4Pcs Number of FXS ports for phone (RJ11): no data Number of FXO ports: no data Number of PSTN (RJ11) ports: no data Supported VoIP protocols: Smart Phone Control Protocol (SPCP), SIP - Session Initiation Protocol Sound encrypting protocol: ITU G.711, ITU G.729 Supported protocols and standards: CDP - Cisco Discovery Protocol, TFTP - Trivial File Transfer Protocol, DHCP Client - Dynamic Host Configuration Protocol Client, IEEE 802.3af - Power over Ethernet Additional phone's functions: CLIP - Calling Line Identification Presentation, Call Forwarding, conference call, Call Waiting, speed dial keys, suppoort cascade connection Standard accessory: phone