The Cisco IP Conference Phone 7832 and Cisco IP Conference Phone 8832 don't support headsets.

Plug the headset into the jack on the back of the phone and press the cable into the cable channel.

Standard headset connection image
Standard Headset Connection

Failure to press the cable into the channel in the phone can damage the printed circuit board inside the phone. The cable channel reduces the strain on the connector and the printed circuit board.