Help > Using the Web Interface > Telephony > Call signalling
Call signalling
Reverse search
For incoming and outbound calls, this option displays the names of saved contacts that are suitable for the phone number.
* For more information, see Reverse search.
Call waiting
Indicates an incoming call during a call.
* For more information, see Call waiting.
Call waiting tone
This acoustic signal indicates that there is an incoming call during a call.
If this option is disabled, incoming calls are only signalled by a change in the display content during a call.
* For more information, see Call waiting.
Do not disturb
Rejects calls to the phone.
* For more information, see Do not Disturb.