Path: utzoo!telecom-request Date: Wed, 12 Jun 1991 19:18:55 GMT From: lairdb@crash.cts.com (Laird P. Broadfield) Newsgroups: comp.dcom.telecom Subject: Re: Busying Out a Phone With a Resistor Message-ID: Organization: TELECOM Digest Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 455, Message 7 of 14 Lines: 34 In john@zygot.ati.com (John Higdon) writes: > I could not RESIST adding my two cents -- plain to all of this > extensive discussion about what value resistor to busy out a phone > line with. For a quarter century, when it has been necessary to busy > out a phone line I have simply shorted it. In the case of ground > start, I have shorted it and grounded it as well. I had one trunk left > this way for about a year. Came back, pulled the short and the line > came right back to life. No CO switch, modern or ancient, gives a > hoot or a holler about what kind of load is on a line. It is all > current limited in the subscriber line equipment. Yes, John, but as we all know, you're served by a combination of an SXS and Ernestine on a cord-board. (Seriously though, folks, Pathetic*Bell really *is* nearly as pathetic as John makes them out to be.) 'Fraid though that quite a bit of CO equipment does indeed care about load on the line, as I recall a 5ESS (or was that a DMS? fuzzy memory) will drop dialtone *and* all but minimal battery on sensing a full short. Whether this will clear itself on removing the short or requires an official Service Action is a software toggle (read that as "another way for the BOC to justify a repair charge.") In fact, Keptel(Armiger)'s fancier MTUs and SNI-MTUs will perform this disconnect automatically right at your demarc; they can also be set for self-reset or requires-telco-visit-reset. Laird P. Broadfield UUCP: {ucsd, nosc}!crash!lairdb INET: lairdb@crash.cts.com