Hang-up Pulse

Article View: sci.electronics

Article #21465

#21465

From: kirk.n.trost
Date: Mon, 22 May 1989 23:37

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Does anyone have a simple circuit to detect and signal (TTL)
the hang-up pulse that is generated when the other party
hangs up the phone on you.


Thanks,


Kirk ...

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Message-ID: <6794@cbnews.ATT.COM>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!att!cbnews!knt

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!att!cbnews!knt
From: knt@cbnews.ATT.COM (kirk.n.trost)
Newsgroups: sci.electronics
Subject: Hang-up Pulse
Message-ID: <6794@cbnews.ATT.COM>
Date: 22 May 89 23:37:02 GMT
Reply-To: knt@cbnews.ATT.COM (kirk.n.trost)
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 9