See also:

Entering letters and numbers
1.  Turn the controller: select the letters or numbers. 2.  Select additional letters or numbers if needed. 3.  "OK": confirm entry. Switching between letters andnumbersD ...

Malfunction
The warning lamp comes on when the system has failed. A message appears on the Control Display. More information ...

Switching the microphone to mute
When a call is active, the microphone can be muted. 1. "Telephone" 2. "Active calls" 3. "Microphone mute" A microphone that has been switched to mute is automatic ...