When I am using a Pi + NovaM modem, I am able to ssh through both the wifi local connection and the cellular connection at the same time. In fact, I can have two terminals on my laptop open at the same time, one ssh’d into the Pi over wifi, and another ssh’d into the same device over cellular through the modem.
I know nothing of the Jetson carrier board. On a Raspberry Pi, to open a PPP connection, sudo hologram network connect -v on your device at the command line. Obviously you need to make sure you’ve installed hologram’s CLI and CDK tools.
You can see my thread here:
https://community.hologram.io/t/a-simple-out-of-the-box-approach-to-file-transfer-with-novam-solved/2663
where I outline the entire process of using SpaceBridge to create a PPP connection in fairly laymen’s terms. I end up using winSCP to remotely connect over wifi, which is secure copy protocol, based on ssh, to do file transfers between device and laptop. You could substitute this program for PuTTy, OpenSSH, or whatever.
I’d take everything I say with a grain of salt as I’ve only been using the Nova two weeks. Everything I’m telling you could be wrong, and I have my own technical questions about the process that are yet to be resolved.