Phone setup with system software version 9.xx and higher:
Settings are no longer required for using the headset on the phone. After
correctly adapting the phone plug, a headset symbol should now appear in
the "phone display". Should the headset symbol not appear, please check
the following settings:
Menu > Settings > Phone > Phone plug > Activate/select headset.
Phone setup with system software version below 9.xx:
Important: The "Force Headset" function must not be activated on the
phone, as otherwise it will not be possible to accept external calls.
Menu > Settings > Phone > Phone plug > Force headset OFF.
Menu > Settings > Phone > Socket > Activate headset.
Dial tone transfer / phone setup:
Important: The dial tone signal in the headset will only transfer when one
of the following ring tones has been selected on your phone. Standard /
Classic / Cold River / Dooing-Dooing. > Menu > Settings > Dial tone >
Internal / External
In the event that you still do not have a dial tone signal transfer despite
setting the correct ring tone, check the following settings:
