Polycom SoundPoint IP 430. Volume control: Digital. Voice codecs: G.711 A; G.729A / B, VoIP protocols: RFC 3261, Networking features: DHCP/Static IP. Display: LCD, Display resolution: 132 x 46 pixels. Headset connectivity: RJ-9. Supported data transfer rates: 10/100 mbps, Networking standards: 10/100Base-TX