Path: utzoo!telecom-request Date: Thu, 6 Jun 91 18:22:22 CDT From: Al L Varney Newsgroups: comp.dcom.telecom Subject: Re: Busying Out a Phone With a Resistor? Message-ID: Organization: AT&T Network Systems 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 434, Message 3 of 9 Lines: 41 In article hayes!tnixon@uunet.uu.net (Toby Nixon) writes: > In article , Marc Unangst ann-arbor.mi.us> writes: >> I recently had one modem in the middle of a 15-line hunt group go out. >> Not wanting to move the rest of the modems up a line each, I did some >> investigation with a VOM and a telephone, and discovered that plugging >> a 270 ohm resistor into the phone line (across tip and ring) should Any DC value less than 330 ohms should do it, if it's legal. >> Is this an "accepted" way of busying out a phone line? > The FCC has said that it will no longer allow Part 68 registration of > modems that busy out the line in this manner (i.e., by just going > "off-hook"). On the other hand, would a modem that had a switch that caused the modem to refuse to drop new calls still conform to Part 68? The first incoming call would "hang" the line, but you wouldn't have made it "busy" by just going "off-hook". How picky is the FCC on this section? > Centrex is supposed to have a way to tell the CO that a ^^^^^^^ I believe this can be ANY line, for a price. Another option is to use a Hunt Group option that doesn't always start from the same line, assuming that there aren't many "bad" modems. > Bellcore is working > on a DTMF signal that can be sent on the line to tell the switch that > the circuit is busied-out (like the "Do Not Disturb" function on many > PBXes). And what will this "feature" cost on a per-line basis??? Al Varney, AT&T Network Systems, Lisle, IL varney@ihlpf.att.com