The CX300 desktop phone was designed to be used as a regular handset. Calls may be placed or answered using the phone or a Microsoft Office Communicator 2007 R2 client window. Like a traditional phone, the CX300 includes convenient buttons for controlling calls, such as a full dial pad, two-line monochrome backlit display, and keys for controlling volume, mute, speakerphone, hold, redial, and external headset mode. The phone also includes advanced features such as a presence status indicator and integrated message waiting indicator.

The Polycom CX300 desktop phone delivers remarkable high definition audio quality for the ultimate voice communications experience. With its sleek, high-quality handset and its full duplex, hands-free speakerphone, the CX300 desktop phone enables crystal-clear, natural conversations without echoes or feedback.