I was playing with this about a year ago.
themodemdistro website I think has the info needed. https://themodemdistro.com/ (mentioned but I don't see the link)
I think there are nearly 130(yea, one hundred and thirty!) different audio devices in the modem, so figuring it out alone will be difficult I think but should be easy once you figure it out to point the audio recording app or a CLI audio recorder to that particular interface.
You can also 'chat' with the modem via sms and I think you can activate a call recorder in the modem's OS.
themodemdistro website I think has the info needed. https://themodemdistro.com/ (mentioned but I don't see the link)
I think there are nearly 130(yea, one hundred and thirty!) different audio devices in the modem, so figuring it out alone will be difficult I think but should be easy once you figure it out to point the audio recording app or a CLI audio recorder to that particular interface.
You can also 'chat' with the modem via sms and I think you can activate a call recorder in the modem's OS.