I am trying to connect TRM240 to a FritzBox router for 4g failover. However the router does not recognize the TRM240 as a mobile broadband device via AT commands. I have received the following from AVM support:
In the provided support file, we find that your Teltonika dongle does not reveal itself as a mobile broadband device:
04.06.21 09:54:37 A non-supported USB device has been connected.
04.06.21 09:54:37 USB device 1003, class "USB 2.0 (hi-speed) bulk", plugged in
04.06.21 09:54:13 USB device 1002 unplugged
According to the manufacturer's site, this dongle requires specific Windows drivers. We therefore doubt whether the FRITZ!Box can communicate with it with standard AT commands.
Is it possible to configure the TRM240 for this mode? Any advice would be appreciated.