Path: utzoo!attcan!uunet!lll-winken!netsys!vector!nobody From: wheels@mks.UUCP (Gerry Wheeler) Newsgroups: comp.dcom.telecom Subject: Re: sensitive relay wanted Summary: relay found (maybe) Message-ID: Date: 11 Oct 88 19:44:20 GMT References: Sender: chip@vector.UUCP Organization: Mortice Kern Systems, Waterloo, Ont. Lines: 36 Approved: telecom-request@vector.uucp (USENET Telecom Moderator) X-TELECOM-Digest: volume 8, issue 161, message 4 X-Submissions-To: telecom@bu-cs.bu.edu (TELECOM Digest Coordinator) X-Administrivia-To: telecom-request@vector.uucp (USENET Telecom Moderator) In article , tedk@ihuxv.ATT.COM (Kekatos) writes: > Sorry, This can not be done with a ONLY a relay. You just can not > draw enough current from the phone line. > > Ted G. Kekatos > AT&T Bell Laboratories, Indian Hill South, IX-1F-460 I have to disagree with this. I've seen several items which draw enough line power to run a relay. One was a Radio Shack box which sensed line current to close a relay which could be wired to the A-A1 control leads of a key system. It allowed an answering machine to be used and to give an indication on all the sets. (In fact, if Radio Shack still sold this one, I would get it and use the relay. Sigh.) I received a mail msg the other day on this, as follows: > From: kirk@tikal.TELTONE.COM (Kirk Bellar) > Subject: Re: sensitive relay wanted > Date: 29 Sep 88 21:44:28 GMT > > Teltone sells a relay for this purpose, called the M-949. It closes a 1 > form A (SPST) contact if loop current is 20 mA or better. > --- > Kirk Bellar KE7TN Teltone Corp. (Tones `R' Us) > uw-beaver!tikal!kirk Kirkland, Wa. USA (206) 827-9626 I called my closest Teltone rep, and they are going to send me one as soon as they can get it from the office in Kirkland. (They kindly offered to waive the usual $100 minimum order.) So, I'll let you know what happens. Thanks for all the replies. -- Gerry Wheeler Phone: (519)884-2251 Mortice Kern Systems Inc. UUCP: uunet!watmath!mks!wheels 35 King St. North BIX: join mks Waterloo, Ontario N2J 2W9 CompuServe: 73260,1043