FRITZ!Box 3390 Service - Knowledge Base
FRITZ!Box changes the wireless channel that was manually selected
Although a specific wireless channel was selected for the 2.4 GHz frequency band in the user interface, the FRITZ!Box switches to a different channel on its own. The following error message is then displayed in the event log of the FRITZ!Box:
- "A very strong source of interference was detected on channel [...]; channel switched automatically."
1 Channel was changed due to strong interference
The FRITZ!Box detected a source of interference on the wireless channel that was manually selected, and the interference greatly impairs the connection. To guarantee stable and fast data transmissions despite this, the FRITZ!Box automatically switches to an interference-free wireless channel, regardless of the settings in the user interface. When the FRITZ!Box determines that there is no more interference on the wireless channel you selected, it automatically switches back to it.