The Sound Point IP 321 is two-line SIP phones that deliver superb sound quality as well as a wide range of supported business telephony features. The Sound Point IP 321 phone has a single 10/100 Ethernet port & is designed for common areas, such as lobbies, hallways, & break rooms, as well as various wall-mounted deployments. The Sound Point IP 321 phone features a full-duplex IEEE 1329 Type 1-compliant speakerphone with Polycoms legendary Acoustic Clarity technology that delivers excellent sound quality & enables noise-free & echo-free conversations that are as natural as being there. The Sound Point IP 321 phone delivers through an intuitive user interface a full feature set encompassing both traditional business telephony features such as call hold, park, pick-up, transfer, & three-way local conferencing, & more advanced capabilities such as shared call/bridged line appearance, hosts built-in XML micro browser, & distinctive call treatment.