From owner-freebsd-questions Fri Apr 21 08:40:19 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id IAA09724 for questions-outgoing; Fri, 21 Apr 1995 08:40:19 -0700 Received: from trout.sri.MT.net (trout.sri.MT.net [204.182.243.12]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id IAA09718 for ; Fri, 21 Apr 1995 08:40:14 -0700 Received: (from nate@localhost) by trout.sri.MT.net (8.6.11/8.6.11) id JAA12577; Fri, 21 Apr 1995 09:41:13 -0600 Date: Fri, 21 Apr 1995 09:41:13 -0600 From: Nate Williams Message-Id: <199504211541.JAA12577@trout.sri.MT.net> In-Reply-To: jeffa@sybase.com (Jeff Anuszczyk) "Re: Annex router" (Apr 21, 11:14am) X-Mailer: Mail User's Shell (7.2.5 10/14/92) To: jeffa@sybase.com (Jeff Anuszczyk), mcw@hpato.aus.hp.com Subject: Re: Annex router Cc: questions@FreeBSD.org Sender: questions-owner@FreeBSD.org Precedence: bulk > > The problem I have is the carrier keeps dropping once per day, and if lucky > > it will stay up to 2 days, and that's about it. My questions are : > > Well, as much as I'd love to say you can do *MUCH* better, in the states > I find that two days would be very good indeed. I guess my provider is better than average then. After the initial first 2 weeks of hassles getting my second line working as a full-time SLIP/PPP link, I've had uptimes of 2 weeks w/out a line drop. Granted, my line was guaranteed to be wired (most of the newer lines are radio), and I live in a small-ish town (< 50K folks). However, on my second line (radio), every night the telco. does a line check about 11 p.m. every night which causes my phones to 'fake-ring', which also caused my modem line to fail every night before I got it switched to copper. I've seen many phone co's. do line checking in the middle of the night at different place, but somehow the line I have now doesn't seem to exhibit the problem. > much more experience can give their experiences... but in my mind, unless > it's a leased line, 24 hours of uptime is good, anymore is great. I would tend to agree. > > 1) Is there a way for one to determine which side is actually the culprit ? It might not be one of the modem's fault as much as a line fault. > Bad line quality (i.e. intermittent line noise) usually is the #1 culprit. > Please be aware that the faster the modem the more susseptible to noise > it is. 28.8K modems (V.34) are pretty decent in their recovery capability > but they can drop the link when the noise gets bad enough. Also note if you have one of the cheaper 28.8K modems, they will retrain down due to bad line noise, but *NOT* retrain up. This means that for some folks, it's better to drop/re-connect since you have a better chance of keeping a high speed link. If you're modems hold onto the link, the modems will realize the line quality is not that good and drop their speed. So, after 3 days your 28.8K modems are doing 2400 baud and require a power-cycle anyway. :( [ Other good advice deleted ] Nate