The Polycom SoundPoint IP 300 is a VoIP phone that provides an easy transition from PBX to VoIP with dedicated keys and a LCD display. It supports up to two lines, handset or headset mode, protocol and partner solutions. Key features include message alerts, line keys, configurable feature keys, mute, headset, hold, speaker, dual Ethernet ports, G.711m/A and G.729a codecs, and IETF SIP protocol support. It can be powered by AC or Power over Ethernet.