Callers hear a fax toneCallers hear a fax tone when they call you. The telephones connected to the FRITZ!Box do not ring or only ring a couple of times and you cannot answer the call. Cause A fax (external fax machine, integrated fax function of the FRITZ!Box, or fax software) answers the call immediately, so you cannot answer the call with a telephone. Simply proceed as described below. After...
> https://en.avm.de/service/knowledge-base/dok/FRITZ-Box-7590-AX/1199_Callers-hear-a-fax-tone/
Using FRITZ!DECT 500 Example: Setting brightness and color of FRITZ!DECT 500 The LED light FRITZ!DECT 500 is integrated into the FRITZ!Box home network via an encrypted DECT connection (DECT ULE). Then you can use the user interface of your FRITZ!Box to set the color, color temperature, and brightness of the LED light as well as set up an automatic switching schedule.Requirements / Restrictions...
> https://en.avm.de/service/knowledge-base/dok/FRITZ-Box-7590-AX/3541_Using-FRITZ-DECT-500/