The Polycom CX200 desktop phone combines high definition & high fidelity audio for crystal clear conversations. It has a plug-&-play USB (Universal Serial Bus) audio peripheral that is tightly integrated with Microsoft Office Communicator 2007, full duplex, hands-free speakerphone, keys for volume control, mute speakerphone mode & use of an external headset. LED indicators provide the user with call forwarding status & message waiting indication & a large LED conveys the presence status of the user. It connects & powers through an integrated USB (Universal Serial Bus) cable for easy installation & use, so there are no extra cables to carry. It is optimized for Office Communicator 2007 & compatible with Microsoft Windows XP or Microsoft Windows Vista operating systems.