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Topic: Technology
Number of pages / Number of words: 15 / 4119
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The term "tip and ring" is used to designate the two wires of a standard telephone line and was derived from the early switchboard era. In those days, the tip lead was connected to the tip portion of an operator jack plug, while the ring lead was connected to the brass ring located just behind the tip...


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A third lead, known as the "sleeve" lead, was wired to the shaft or main body of the plug to affect supervision or control of the manually switched connection.

This ringing signaling method was also used to alert the local exchange operator. To originate a call, the subscriber would simply crank the generator on a magneto telephone, which sent ringing current to the central office switchboard...


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