Cannot register FRITZ!FonRegistration of FRITZ!Fon fails. The following messages are displayed: In the FRITZ!Box user interface: "Registration with the DECT base station failed. The reason for the error is displayed on the cordless (DECT) telephone" On the telephone's display: Registration at Base 1, 2, 3 or 4 failed" or "Search for base" Simply proceed as described below. After each measure,...
> https://en.avm.de/service/knowledge-base/dok/FRITZ-Fon-X6/65_Cannot-register-FRITZ-Fon/
Assigning numbers to FRITZ!FonIf you have several telephone numbers, you can assign numbers for outgoing and incoming calls to your FRITZ!Fon. This way you can specify which number FRITZ!Fon uses for making outgoing calls, and which numbers it reacts to when you receive calls.1 Assigning telephone numbersThe base station is used to assign the telephone numbers to FRITZ!Fon. If FRITZ!Fon is...
> https://en.avm.de/service/knowledge-base/dok/FRITZ-Fon-X6/23_Assigning-numbers-to-FRITZ-Fon/