ADB and diagnostic port on MR2100

Okay, let's try. You are responsible for everything you do!
To switch the USB composition, you must enter the AT command.
The command can be entered, for example, via PuTTY. Before that, you need to connect the router to the PC and go to the main menu of the router on the web page.
In PuTTY, you need to select Telnet or Raw, set the IP address of the router through which you access its web page, set port 5510 and click "open". Next, you can enter the AT command.
To check the connection, you can enter the ATI command which will show information on the router.
Then you can see the current USB composition of the command AT !USBCOMP? Should be 68E1.
Next, you can already change the USB composition with the same command, but with the equal sign AT !USBCOMP=* instead of the asterisk, you must substitute the composition number. I am using 68E2_ADB. AT !USBCOMP=68E2_ADB
A space must be inserted after the AT prefix.

Changes to the USB composition will occur after the router is rebooted.
In general, there are a lot of compositions, I don’t know which ones will suit you. Whether all of them will work, I did not check.
If an incorrect composition is entered and you lose the opportunity to change it, you can simply reset the router to factory settings and the composition will automatically switch to the original 68E1.

Drivers for the appeared devices can be obtained by installing the Netgear Aircard driver package or the driver package from Qualcomm.