Origin
The terms tip and ring originated in the early days of telephony, when human telephone operators used phone plugs to connect customer calls. The names of the wires are derived from the part of the plug to which they are connected. The words are often abbreviated as T and R in wiring diagrams. While the ring is connected to −48 volts, the tip is connected to ground for safety. This is because when the telephone operator is handling the plug, the tip is more likely to touch something other than intended.
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Famous quotes containing the word origin:
“There are certain books in the world which every searcher for truth must know: the Bible, the Critique of Pure Reason, the Origin of Species, and Karl Marx’s Capital.”
—W.E.B. (William Edward Burghardt)
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