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Path: utzoo!decvax!ucbvax!amdcad.AMD.COM!rpw3
From: rpw3@amdcad.AMD.COM.UUCP
Newsgroups: mod.telecom
Subject: Re: More Hold Circuit
Message-ID: <8701210634.AA18553@ucbvax.Berkeley.EDU>
Date: Fri, 2-Jan-87 06:58:02 EST
Article-I.D.: ucbvax.8701210634.AA18553
Posted: Fri Jan  2 06:58:02 1987
Date-Received: Wed, 21-Jan-87 18:44:37 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: telecom@xx.lcs.mit.edu
Summary: Go to radio Shack

Forget trying to build a hold circuit; it's not worth it. Just go
to Radio Shack and buy their hold module (or whatever it's called).
It plugs in anywhere, in parallel with your other phones. (Also
requires A.C. line power, but the whole module is one of those
"wart on the wall" styles, so it hides away o.k.) You activate it
with a quick double switch-hook flash (it beeps at you if it saw
your flash), then hang up. Pick up any line and it drops out.

Only "problem" is that it holds onto the line (necessarily) for
about one second when you hang up, which can be somewhat tricky
if you also have Call Waiting (which I do), but you very quickly
learn to add that delay to the flash needed for Call Waiting.
(That is, to switch to the waiting call, you flash for 1.5 seconds --
one sec to get the hold module to drop, and 1/2 sec for Call Waiting.)
I think I only blew it once before I got the knack...

Rob Warnock
Systems Architecture Consultant

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