I was able to solve an issue connecting a TRS-80 Model 100 to a Kantronics KPC-3 TNC.
Category: Packet
I recently tried HF packet using a vintage Kantronics KAM All Mode TNC and the FT-991A. I used an RJ45 A/B switch to be able to switch between either port of the KAM or between the KAM and my KPC-3.
Packet radio is still a popular mode for APRS and Winlink, to name a few uses. With many forms of packet including hardware and software options, it’s worth exploring.