Polycom SoundPoint IP 320. Display: LCD, Display resolution: 102 x 33 pixels. Voice codecs: G.711 μ/A, G.729A, Frequency response: 300 - 3300 Hz. Supported network protocols: IETF, SIP, RFC 3261, RFCs, SNTP, FTP, TFTP, HTTP, HTTPS. Input voltage: 24 V. Dimensions (WxDxH): 145 x 175 x 170 mm, Weight: 625 g