Key Assignments
Forum Phone 515/525/535 System Telephones
19
Muting Key
S
To deactivate the microphone during a call. The illuminated LED of the
key indicates that the microphone is turned off. The LED of the key is illumi-
nated when the microphone is deactivated. The ringer of your telephone can
be switched off for incoming calls over the muting key.
Disconnect Key
T
Pressing this key ends the current call.
Headset Key
K
If a headset is connected and switched on (to switch on a headset, see
page 118), calls can be accepted and calls can be ended by pressing this key.
The LED of the key is illuminated when a call is made via the headset.
It is also possible to enable a second person to listen in on a call over a
connected headset while you are telephoning over the handset. To enable,
press the headset key during the call. Listening-in over the headset is now
activated, the LED on the headset key flashes.
Enquiry Key
R
To initiate and end an enquiry call. After you have ended an enquiry call,
switch back to the call being held with this key.
Plus/Minus Key
=
This key offers various functions which depend on the device
status:
●
It adjusts the volume during open-listening/hands-free mode.
●
It adjusts the volume when making a call via the handset.
●
It adjusts the volume of the headphones of a headset (the volume of the
microphone
can be adjusted over the
4 Phone settings
MenuCard, see
page 118).
●
It adjusts the volume of the ringer tone during a call.
●
It sets the contrast of the display when the telephone is in the idle state.
●
It switches features on/off quickly.