Well, the Starlink could be connected by an admin to a computer that is connected to SIPRNet, right? It exposes itself as just a router.
I mean, assuming the Starlink was brought on board by someone with authorization to be on board, any possible adversarial situation would necessarily be an internal issue to begin with.
Personally, I think the most likely answer involves an Xbox.
It’s the Handset Protocol/Handsfree Protocol that was developed for simultaneous sending and receiving of voice data. They’re the only protocols that support sending and receiving voice at the same time, and they do that by sending mono telephone quality audio and receiving mono telephone quality audio.
It’s why most gaming headsets, even ones with Bluetooth, include a small RF dongle separately. Bluetooth is technically incapable of high-quality audio when recording.