Off-hook Articles about
Off-hook
 

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Off-hook




# The condition that exists when a (''i.e.'', receiver) which was removed from its switchhook. The weight of the receiver no longer depresses the spring loaded switchhook thereby connecting the instrument to the Telephone Line .
# One of two possible Signaling states, such as tone or no tone and Ground Connection versus battery connection. Note that if off-hook pertains to one state, On-hook pertains to the other.
# The active state, ''i.e.'', a closed loop of a Subscriber Line or PBX user loop.
# An operating state of a communications link in which Data Transmission is enabled either for (a) voice or data communications or (b) Network Signaling .

Source: from Federal Standard 1037C and from MIL-STD-188