I have no knowledge of your particular cellular device. It isn’t unusual to use a UART for configuration, but data with some other type of data pipe. One example would be that the modem is set up with serial UART, but creates a network device visible from “
ifconfig” or “
iwconfig” (which would then imply any device told to use that network address would talk through the modem).
The AT command set is very old, and is used on a number of modems for their setup. Older modems would also use that same serial interface for data, but most of these were 56kbps or slower. Newer generation cellular modems can probably exceed that by quite a bit, and would use the AT commands to set up for creation of the “
ifconfig” (or “
iwconfig”) device; the end program using this would have to have network capability.
What it comes down to is there there must be a driver for the modem. Sometimes there will be two drivers: One for the actual modem, and the other for the UART talking to the modem. Third party software would be used once the UART and any other driver is in place. I have no possibility of being able to help with the actual modem, this is a per manufacturer thing, and I have no experience with this modem.
If you need information installing drivers (and can name the driver), then that is easy to help with. If you need information on how to do network programming when your modem produces a working network device, then this too is fairly simple. It’s the details of the particular modem which are specialized and difficult to help with.