Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!mcdphx!hrc!rako!rakoczynskij From: rakoczynskij@rako.UUCP (Jurek Rakoczynski) Newsgroups: sci.electronics Subject: Re: Phones used as intercoms Message-ID: <4e1f9d95.18d2a@rako.UUCP> Date: 20 Nov 90 17:54:06 GMT References: <1990Nov12.181746.5465@syssoft.com> Organization: AG Communication Systems-Phoenix, AZ Lines: 39 In article <1990Nov12.181746.5465@syssoft.com>, len@syssoft.com (Len Galasso) writes: > > > I live in a four-bedroom, split-level house which has at least one phone > jack in each room. What I'd like to do is to allow the phone "network"-- > if you will--act like a local intercom when it isn't being used as a > regular phone system. More specifically, I'd like to be able to somehow Remaining text deleted. Radio & Electronics had several articles over the last several years to do similiar projects, but if you want ideas for other ways to take advantage of all your room phone jacks how about using some ideas out of Radio Shack. 1. They have a 2 station intercom that goes between the phone and wall jack. It provide a 'hold' function. It probably uses the yel/blk leads of the 4 wire phone line that should tie all the phone jacks together (just a guess on my part. It probably won't work if you have the 'old' style Princes phone that used a wall transformer to send power on the yel/blk leads to light the buttons.). It's order # 43-206, price $49.94 in the 1991 catalog. 2. You may want to try one of their 2 station (# 43-222, $14.95) or 4 station (#43-223, $24.95) intercoms. These are provided with 66-ft cables to interconnet the units but you could shorten the cable and add a phone plug on the end. Just wire to the yel/blk pins on the plug and plug into the jack. All this assumes that you have a single line to your home that uses the red/grn leads (standard practice, but do-it-yourselfers screw-up) and no power on the yel/blk leads. I have no association with Radio Shack, but they can be cheap. :-) -- UUCP: {ncar!noao!asuvax | uunet!zardoz!hrc | att}!gtephx!rakoczynskij Inet: gtephx!rakoczynskij@asuvax.eas.asu.edu Voice: +1 602 581 4867 Fax: +1 602 582 7111