key telephone system
(redirected from Key service unit)

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key telephone system

An inhouse telephone system that is not centrally connected to a PBX. Also known as a "key system," each telephone has buttons for outside lines that can be dialed directly without having to "dial 9."

key telephone system [′kē ′tel·ə‚fōn ‚sis·təm]

(communications)

A telephone system consisting of phones with several keys, connecting cables, and relay switching apparatus, which does not need a special operator to handle incoming or outgoing calls and which generally permits users to select one of several possible lines and to hold calls.

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key telephone system (redirected from Key service unit)

key telephone system

key telephone system
(redirected from Key service unit)