Screen : Medium screen graphic display 168 x 80 pixel, 4 grayscale Lines : 1 Networking : "Integrated switch base (two 10/100 BASE T ports with autonegotiation)" Voice Codecs : G.711, G.729a/b Quality Of Service : QoS Options of UDP Port selection, Diffserv, 802.1p/q Network Protocols : SNMP Features : 12-button touchtone dial pad with raised bar on button labeled five for the visually impaired. Hearing aid compatible Power Supply : POE Dimensions : 21.2 x 26 x 7 cm Weight : 0.9 Kg