Screen : 128 x 32 pixel, monochrome, graphical, non-backlit Lines : 1 Networking : 10/100BASE-T wired Ethernet LAN port plus switched PC port Voice Codecs : G.711a, G.711?, G.729, G.729a, and G.729ab Network Features : Dynamic Host Configuration Protocol (DHCP), Support for online firmware upgrades using Trivial File Transfer Protocol (TFTP), Domain Name System (DNS) Signaling protocol support : SIP Power Supply : IEEE PoE 802.3af is supported, Class 1 Dimensions : 205 x 150 x 53.5 mm Weight : 594.3g