User guide

Other Device Functions 19
Operating the Forum IPhone 512
Adjusting Volume
You can adjust the volume of the ringer, of the handset or of the
speaker with the volume keys .
z During call signalling you can adjust the volume of the ringer.
z While making a call, you adjust the volume of the handset or –
in the handsfree mode – the volume of the speaker.
Call Protection
The administrator of the Forum 500 / Forum 5000 communica-
tions system can configure a Call protection function key (please
refer to Function Keys Reference starting on page 37).
1. Press the Call protection function key to activate call
protection.
The LED next to the function key lights up. The person calling
hears the ringing tone, but your telephone does not signal the
call.
2. Press the function key once again to deactivate the call
protection function.
Call Waiting Protection
The administrator of the Forum 500 / Forum 5000 communica-
tions system can configure a Call waiting protection function
key (please refer to Function Keys Reference starting on
page 37).
1. Press the Call waiting protection function key to activate call
waiting protection.
The LED next to the function key lights up. While you are
telephoning, other calls will not be signalled by a call-waiting
tone; the caller hears the busy tone.
2. Press the function key once again to deactivate the call
protection function.