> Make that 19th century. The essential component that allows two-way
> transmission on a single pair of wires, the bridge (or hybrid) transformer,
> was a late 19th century invention. The clue is that ground is the third
> conductor.
There is still a lot of gas in that tank. We're testing gear that will
give us up to a gig over a pair or two. Distance is the big
limitation. But still, it's amazing what we can squeeze through
twisted 26 gauge.
Multi-Century Schnozz
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