Path: utzoo!attcan!uunet!bu.edu!telecom-request From: bruce@camb.com (Barton F. Bruce) Newsgroups: comp.dcom.telecom Subject: Re: Phone Dinging Around 2 AM Message-ID: Date: 27 Feb 91 06:58:11 GMT Sender: news@bu.edu.bu.edu Organization: Cambridge Computer Associates, Inc. Lines: 31 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 167, Message 1 of 11 In article , think!barmar@bloom-beacon. mit.edu (Barry Margolin) writes: > On most nights, somewhere between 2 and 3 AM, my phone will > spontaneously emit two tiny rings (it has a real bell, not a tone > generator, and goes ding -- ding). I get it also in Arlington MA. Not long enough to latch the 1A2's line card for its six or so second normal memory of having seen ringing, but enough to ding the bells. FWIW, my line cards are so HI-Z the test board gets confused thinking there is an open line. They simply can't 'see' the cards. I had simply assumed adding a normal phone to the line would stop whatever automatic line testing is happening from ringing my bells because its load would shunt whatever is goosing my KTUs. Your having it happen now makes me wonder if my assumption is wrong. The traditional ringer IS sensitive to the polarity of pulses! Aside from adjusting the bias spring, the 'proper' cure for BELL-TAP (tinkeling as a rotary extension or other party dials or even just goes on/off hook) is to have the phone's two wires connected properly to TIP and RING. Early TT phones really cared, because the TT pad wouldn't work if wired backwards. Now all TT phones have the polarity-guard (diode bridge) built in so they are clutz proof. You might just try reversing the two line wires. There may be a bias spring that can be hooked to a stiffer notch that will help.