Press Toggle to select one of the following options:
Disabled: You can disable the signaling from the phone to the headset.
Switch hook and alert: You can activate the link to the headset if you press Headset. When the phone receives an incoming call you hear the alert tone in the headset.
Switch hook only: You can activates the link to the headset if you press Headset. When the phone receives an incoming call you do not hear the alert tone in the headset.