Designed to appeal to both executive users who require advanced features & applications, & telephone attendants who need multiple line support & enhanced call handling capabilities, the Polycom Sound Point IP 650 sets a new standard for a high-performance IP phone. The Sound Point IP 650 is the first IP phone to use Polycom's revolutionary HD Voice technology that delivers voice communications of life-like richness & clarity. The phone's SIP 2.0 software fully supports Microsoft Live Communications Server 2005 for telephony & presence, & integrates with Microsoft Office Communicator instant messenger client. The Sound Point IP 650 features a USB (Universal Serial Bus) port for future applications. The Sound Point IP 650 accommodates 6 lines in a standalone mode & up to 12 lines when equipped with Sound Point IP Expansion Modules, as an attendant console. The phone supports shared call / bridged line appearances as well as busy lamp field (BLF) functionality that enables phone attendants to monitor & manage calls more efficiently. When equipped with up to three Sound Point IP Expansion Modules, the Sound Point IP 650 delivers the advanced call handling capabilities & enhanced user interface of a high-performance attendant console. The Sound Point IP 650 delivers all of its capabilities through an intuitive user interface, featuring a high-quality backlit 320x 160 graphical grayscale LCD display, an easy-to-navigate menu, & a combination of dedicated keys & context-sensitive soft keys for one-button access to essential telephony features.