AUTOPATCH_RELEASE

Published:2009/7/14 8:32:00 Author:May | From:SeekIC

Control circuit automatically releases telephone autopatch at receiver when called party hangs up, by generating disconnect signal for patch control logic. Action is based on reversal of polarity of phone line when called party answers, and return of polarity to preanswered condition when called party hangs up. Article describes circuit operation and use.-T. R. Yocom, Automatic Auto-patch Release, 73 Magazine, April 1977, p 52.



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