To place or answer calls using the headset, plug the approved headset connector into the headset port (top) on the back of the phone base and press the HEADSET button.

You can use the headset with all Cisco IP Phone 7940/7960 features. The VOLUME and MUTE controls also adjust volume to the ear piece and mute the speech path of the headset.

The Cisco IP Phone 7940/7960 supports a four- or six-wire headset jack (Plantronics H series compatible is required).