Nortel IP Audio Conference Phone 2033. Networking features: 10/100Base-T, Supported network protocols: E.164 Dialing IEEE 1329 (Full Duplex). Display: FSTN, Display resolution: 248 x 64 pixels. Frequency range: 300-3300 Hz. Weight: 800 g, Dimensions (WxDxH): 311 x 64 x 368 mm. Compatibility: Nortel Communication Server Support: -Nortel Communication Server 1000 Release 3.0