Introducing the SoundPoint IP 331 and 321 two-line SIP phones that deliver superb sound quality as well as a wide range of supported business telephony features. The SoundPoint IP 330/331 phone, with its dual-port 10/100 Ethernet switch for LAN and PC connection, presents a cost-effective solution for cubicle workers as well as call center operators who use a “hard” phone in conjunction with a “soft” client running on the PC. The SoundPoint IP 320/321 phone has a single 10/100 Ethernet port, therefore its application targets include common areas, such as lobbies, hallways, and break rooms, as well as various wall-mounted deployments. Optional power supply (see beside box). Choose 'Power Sup.' to provide power when in-line Power over Ethernet (PoE) is not available.