I am interested in using the SIM7600 module for designing a system with LTE communication. The module will be connected to the host system via USB.
I would like the host system's Linux to use PPP to connect to the internet via the module and to be able to send/receive SMS at the same time. So, I will need at least 2 USB virtual ports for these two capabilities. I've seen in the hardware design document that 4 virtual ports are available: audio, AT, diagnostics and NMEA. I guess the AT port will be used for the PPP connection.
So, are there other virtual ports (different from the 4 above) I can use for SMS AT commands, or can I use one of the remaining 3?