The Polycom SoundPoint IP 550 desktop phone is a four-line SIP phone that delivers calls of unprecedented clarity and richness and supports a comprehensive range of cutting-edge features. Polycom's revolutionary HD Voice technology incorporates wideband audio for more than twice the voice clarity; Polycom's patented Acoustic Clarity Technology gives crystal-clear, noise- and echo-free sound, plus best-in-class system design for high-fidelity, faithful voice reproduction. The SoundPoint IP 550 desktop IP phone provides advanced features and capabilities, such as shared call/ bridged line appearance, busy lamp field (BLF), text messaging, presence and buddy lists. The Polycom SoundPoint IP 550 phone also incorporates an integrated XHTML micro-browser that enables users to make use of productivity-enhancing Web-based applications. With support for four lines, a backlit graphical display and flexible customisation options, it is clear why the SoundPoint IP 550 is able to meet the voice communication needs of the most demanding managers and professionals. The Polycom SoundPoint IP 550 phone is engineered to make installation, configuration and upgrading as simple and efficient as possible. The phone's built-in IEEE 802.3af PoE circuitry and dual-port Ethernet switch allow flexible deployment options and savings on cabling costs.