FRITZ!DECT 301 Service - Knowledge Base
Cannot enable DECT Eco function
The "DECT Eco" function is grayed out in the FRITZ!Box user interface and cannot be enabled.
1 Cannot use function for technical reasons
For technical reasons, the "DECT Eco" function is no longer available when a radiator control is registered with the FRITZ!Box. The DECT ULE (Ultra Low Energy) protocol itself already reduces the volume of data.
Note:If you are no longer using a radiator control, you can delete it under "Home Network > Smart Home" in the FRITZ!Box user interface.