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From: BRUCE@ccavax.camb.com (Barton F. Bruce)
Newsgroups: comp.dcom.telecom
Subject: Re: Interlock For Two Phones
Message-ID: <14241@accuvax.nwu.edu>
Date: 1 Nov 90 21:46:16 GMT
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X-Telecom-Digest: Volume 10, Issue 782, Message 5 of 10


In article <14183@accuvax.nwu.edu>, tim@ncoast.org (Tim Stradtman)
writes:

> Recently there was an article referring to a simple gadget that would
> interlock two phones so that only one could be in use at a time.  I

Can't help with the requested article, but that functionality is an
old standard 1A2 or even 1A1 key system standby. The key system
version needs lots of exclusion cards and a mess of wiring, and is
best done for maybe 1 line and 1 phone excluding ALL other phones from
getting that line.

Any level of sophistication can be installed, but it gets to be a real
mess to maintain.

The easier way is to use the simple little inline encapsulated solid
state thingies that 1) can let which ever phone gets the line
automatically exclude ALL others so equipped, or 2) a master phone can
even 'steal' the connection from another simply by going off hook.

There is provision for allowing another back in so two of you can be
on the line at once.

These little electronic excluders have been in supply catalogs for
years, and I think you should try Proctor Associates (Redmond WA), or
maybe even Melco (now Augat Comm Division - there is an 800 # listed
under Augat Comm Div). Start with Proctor, and if they no longer make
them, ask who does.