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Xref: sserve comp.os.linux.development:18594 comp.os.linux.misc:28701 comp.os.386bsd.questions:14208 comp.os.386bsd.misc:3947 sci.electronics:83153 Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!bunyip.cc.uq.oz.au!munnari.oz.au!spool.mu.edu!howland.reston.ans.net!news.sprintlink.net!EU.net!sunic!news.chalmers.se!cd.chalmers.se!tl From: tl@cd.chalmers.se (Torbj|rn Lindgren) Newsgroups: comp.os.linux.development,comp.os.linux.misc,comp.os.386bsd.questions,comp.os.386bsd.misc,sci.electronics Subject: Re: 16550 detection Date: 3 Nov 1994 22:01:15 GMT Organization: Chalmers Computer Society Lines: 28 Message-ID: <39bmjb$apj@nyheter.chalmers.se> References: <CMETZ.94Oct30051603@itchy.inner.net> <jonkCyo2Au.239@netcom.com> <Cyp2ws.MIq@bonkers.taronga.com> <jonkCypCzF.Jrq@netcom.com> NNTP-Posting-Host: haddock.cd.chalmers.se In article <jonkCypCzF.Jrq@netcom.com>, Jonathan Dale Kirwan <jonk@netcom.com> wrote: >Peter da Silva (peter@bonkers.taronga.com) wrote: >: Finally, external modems make great external fuses for minor power surges >: over the phone line. I'd rather not have that plugged into my bus. [...] >But I've not seen it or heard of a specific example that actually did >occur. I don't doubt that such a situation has occured, but I just don't >hold my breath waiting. There are other forms of insurance more worthy >of purchase, I think. I have seen several such cases. This *may* have something to do with the fact that I have repaired a lot of modems :-> In a lot of the cases it was rather easy (replacing a couple of opto-couplers and/or the VAR) since most modems were external. In these cases a internal modem *might* be able to take the hit without blowing the mother-board (it's hard to tell since internal modems are much harder to diagnose). Then there were other cases... The most spectacular were a modem when the whole circuit-board was blackened and several circuits were melted :) Had this been an internal modem I don't think the computer would have had a chance, but since it was an external modem the surge was picked up by the 1488/1489's in the modem (Those circuits are tough!). It's rather uncommon to see damaged modems that have been used in the city thought. Lightning is mainly a problem with air based wires, and these are very uncommon in the cities (at least in Sweden). This also means that most of these modems are from private customers.