No reason your Gigaset cordless system should not work. The remote handsets may not be communicating with the base. You can check the remote handsets are still linked to the base by 'paging' them. From the phone manual ...
Locating a handset ("Paging")You can locate your handset using the base.
Briefly press the registration/paging key on the base (¢ page 1).All handsets will ring at the same time (“paging”), even if the ringers are switched off.
Ending paging: Briefly press the registration/paging key on the base (¢ page 1) or press the talk key b or the end call key a on the handset
If the remote handsets do not ring, you will need to re-register them to the base station.
