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There was a lab I hung out in back in college. The nature of the room and the devices that we had in there, there was 10bT, 10b2, and 10b5. Twisted pair, coax, and thick.

The someone had what was termed "the connector of evil". Apparently coax and thick had the same signal... just thick was more rigid about where you connected into it. ( https://en.wikipedia.org/wiki/10BASE5 and https://en.wikipedia.org/wiki/Vampire_tap ). The connector of evil looked like a 10b5 terminator on one side and 10b2 on the other... and passed the signal between them.

When adding another computer onto the 10b2 segment, we would invariably disrupt the wave in the wire and some devices would drop off.

The trick was to have each machine ping -f one of the systems on 10bT and redirect its output to /dev/audio. If the machine was making noise, it was good. And so then we'd fiddle with different lengths of coax between the T connectors until everything was buzzing away.




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