The Polycom SoundPoint IP 331 is a 2-line entry-level SIP desktop phone featuring Acoustic Clarity Technology for full-duplex speakerphone performance. It is designed for cubicle workers and home offices, featuring dual 10/100 Ethernet ports, a 102x33 pixel graphical LCD, and IEEE 802.3af PoE support. The Polycom SoundPoint IP 331 - VoIP-Info notes it is a reliable, cost-effective, and easy-to-use device