(sound of an old man’s hideous hacking laugh…) No, copper pair was how they delivered phone service… just two copper wires. Once upon a time, in the 80s, I worked for a telephony engineer, and learned that old land-line phones work on two wires. Phones did have four, to (if I remember) enable a second line on the one instrument. The two wires are called the tip and the ring.
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