COMMUNICATION SYSTEMS

A switching system arrangement for simultaneously scanning multiple groups of line circuits to locate calling and called stations connected to concurrently scanned ones of the line circuits. A supervisory circuit selectively removes bias voltage from one lead of pairs of bias leads extending to idle...

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Bibliographic Details
Main Authors DAVID LEE FAIRCHILD, MICHAEL STEPHEN LANE
Format Patent
LanguageEnglish
Published 13.06.1974
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
SELECTING
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Summary:A switching system arrangement for simultaneously scanning multiple groups of line circuits to locate calling and called stations connected to concurrently scanned ones of the line circuits. A supervisory circuit selectively removes bias voltage from one lead of pairs of bias leads extending to idle and busy ones of the line circuits assigned to the concurrently scanned line circuits to facilitate the identity of a line circuit connected to a calling station. Subsequently, the supervisory circuit removes bias voltage from the pair of bias leads extending to the group of line circuits wherein the line circuit connected to the called station is located. Finally, the switching system interconnects the calling station and the called station through the line circuits identified from the ones of the concurrently scanned line circuits.
Bibliography:Application Number: AU19720050008