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Article #615

Line In Use Circuit: How do I make one?

#615
From: ewhac
Date: Sat, 10 Jan 1987 08:21
24 lines
1763 bytes
[ Hello.  My name is Peabody.  I suppose you know yours.... ]

	Hold circuits are nice, but I'd like to build a little circuit that
turns an LED on or something on all other phone extensions when one of the
extensions is in use (thus letting someone in another part of the house know
the phone is in use).  This will go a long way to keeping my mother from
picking up the phone when I'm talking to another computer.

	Has anyone seen such a beast?  Pointers to such would be
appreciated.

	AtDhVaAnNkCsE.

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Technical Details
Message-ID: <8701210701.AA19317@ucbvax.Berkeley.EDU>
Path: arc1-ca.pugleaf.net!utzoo!decvax!ucbvax!ewhac@lll-lcc.ARPA@well.UUCP

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!decvax!ucbvax!ewhac@lll-lcc.ARPA@well.UUCP
From: ewhac@lll-lcc.ARPA@well.UUCP
Newsgroups: mod.telecom
Subject: Line In Use Circuit: How do I make one?
Message-ID: <8701210701.AA19317@ucbvax.Berkeley.EDU>
Date: Sat, 10-Jan-87 03:21:30 EST
Article-I.D.: ucbvax.8701210701.AA19317
Posted: Sat Jan 10 03:21:30 1987
Date-Received: Wed, 21-Jan-87 18:52:39 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: well!ewhac@lll-lcc.ARPA (Leo 'Bols Ewhac' Schwab)
Organization: Whole Earth Lectronic Link, Sausalito CA
Lines: 24
Approved: telecom@xx.lcs.mit.edu
Summary: Schematics would be nice....