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What does OFF-HOOK stand for? 

What does OFF-HOOK mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: OFF-HOOK.

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What does OFF-HOOK mean?

off-hook
In telephony, on-hook and off-hook are two states of a communication circuit. On subscriber telephones the states are produced by placing the handset onto or off the hookswitch. Placing the circuit into the off-hook state is also called seizing the line. Off-hook originally referred to the condition that prevailed when telephones had a separate earpiece (receiver), which hung from its switchhook until the user initiated a telephone call by removing it. When off hook the weight of the receiver no longer depresses the spring-loaded switchhook, thereby connecting the instrument to the telephone line.

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