Screen : Large pixel-based display Lines : 2 Networking : Two-port Ethernet switch allows for a direct connection to a 10/100BASE-T Ethernet network Voice Codecs : G.711a, G.711?, G.729a, G.729ab, G.722, and iLBC audio compression codecs are supported Network Features : Signaling protocol support : Skinny Client Control Protocol (SCCP) and Session Initiation Protocol (SIP) with Cisco call control Power Supply : 48 VDC required, supplied locally at the desktop using an optional AC-to-DC power supply Dimensions : 20.32 x 26.67 x 15.24 cm Weight : 1.6 kg