The headset button is only available with a subset of digital endpoints, and UNIStim endpoints except for the 2004 and 1110. For endpoints supporting this button, the button will always be present but may not be enabled in provisioning.
The headset button allows users to:
select the first available line appearance and use the headset
switch to using the headset from whatever mode of audio was previously in use.
The button acts as turn on headset audio, turn off any other audio only. The user must use another button to release the call. For example, the release button, the switch hook, another line button if auto-hold is not used and the hold was not pressed.
A station with a handset, headset, and speakerphone may switch from either the speakerphone or handset to using the headset this way; there is no button to return to the handset.
