General
9
Overview of audio and call signals
*Internal dialling signal as permanent signal in B, CH, E, F, GR, NL, P, UK
Function details of audio signals
Internal dialling signal
You hear the internal dialling signal as soon as you pick
up the handset. Now you can enter digits via the
telephone's keypad and dial.
Fast internal dialling signal
You hear the fast internal dialling signal (special dialling
signal), when your telephone is set to 'do not disturb' or
call deflection has been activated.
Internal busy signal
You hear the internal busy signal when - after dialling a
number - the target or the function is not available.
Call back signal
You hear the call back signal in case the telephone
system initiates a call back that has been set previously.
Acknowledge signal
You hear the acknowledge signal when after activating or
deactivating a feature or function of your telephone
system.
Error signal
You hear an error signal in case a combination of digits
could not be understood by the telephone system.
