In most cases, headsets are connected to the phone via the back panel.
Cisco IP Conference Phones 7832 and 8832 do not support headsets on their IP Conference Phones
Connect the USB cable of the headset to the cable channel on the back of your phone and plug the headset into the jack on the back of your phone.
Figure 1. Connectors for standard headsets
The printed circuit board inside the phone can be damaged if the cable is not correctly inserted into the channel in the phone. In addition to reducing strain on the connector and the printed circuit board, the cable channel offers an aesthetic benefit.