The polycom cx200 desktop phone combines high definition and high fidelity audio for crystal clear conversations it has a plug and play usb audio peripheral that is tightly integrated with microsoft office communicator 2007 full duplex hands free speakerphone keys for volume control mute speakerphone mode and use of an external headset led indicators provide the user with call forwarding status and message waiting indication and a large led conveys the presence status of the user it conne