Handset Mute
To mute your handset's microphone during a call:
zPress the Handset Mute feature key.
To restore handset microphone operation:
zPress the Handset Mute feature key again.
Headset Operation
To use a headset with your phone, ensure that the headset is connected to the dedicated jack on the bottom of the phone.
To answer a call (when Auto Answer is disabled):
zPress the flashing line key.
To switch between headset and handset operation while in a call (see Note 2):
zYou can talk using the headset when the Handset Mute key is lit and with the handset when the key is not lit.
To hang up:
zPress CANCEL.
Notes:
1.Lifting the handset on some SUPERSET 4125 phones while it is in headset mode also answers the call.
2.This feature is available on some versions of the SUPERSET 4125 phone only.
3.Disconnecting the headset while in a call, puts your phone in speakerphone mode. You can hear the other party but they cannot hear you. To talk to the other party, press MICROPHONE; to hang up, press
SPEAKER.