Screen : 5" Graphical TFT Color Display, 320 x 240 Pixel Resolution Lines : 1 Networking : 10/100BASE-T Ethernet connection through two RJ-45 ports Voice Codecs : G.711a, G.711, G.729a, G.729b, and G.729ab and iLBC audio-compression codecs Network Features : Cisco Discovery Protocol; IEEE 802.1 p/q tagging and switching Signaling protocol support : Skinny Client Control Protocol (SCCP); supports both SCCP and Session Initiation Protocol (SIP) Features : Full-duplex speakerphone with acoustic echo cancellation, Directories Key, Settings Key, Navigation Cluster with 'Select' Button Power Supply : IEEE 802.3af Power over Ethernet (PoE), or local power through an optional power adaptor Dimensions : 20.83 x 26.67 x 15.24 cm Weight : 1.59 kg