From owner-freebsd-questions Mon Apr 26 16:43:34 1999 Delivered-To: freebsd-questions@freebsd.org Received: from resnet.uoregon.edu (resnet.uoregon.edu [128.223.144.32]) by hub.freebsd.org (Postfix) with ESMTP id E0B461539B for ; Mon, 26 Apr 1999 16:43:30 -0700 (PDT) (envelope-from dwhite@resnet.uoregon.edu) Received: from localhost (dwhite@localhost) by resnet.uoregon.edu (8.8.8/8.8.8) with ESMTP id QAA13493; Mon, 26 Apr 1999 16:43:27 -0700 (PDT) (envelope-from dwhite@resnet.uoregon.edu) Date: Mon, 26 Apr 1999 16:43:26 -0700 (PDT) From: Doug White To: Allen Campbell Cc: questions@FreeBSD.ORG Subject: Re: USR Modem heat and silo overflows? In-Reply-To: <3723EC0B.AF47226E@verinet.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 25 Apr 1999, Allen Campbell wrote: > Relevant specs: > FreeBSD 3.1-STABLE > US Robotics Sportster 56K external > 486/133 > sio0 port speed: 115200 > > After about a week of continuous online operation with user mode ppp, > FreeBSD began reporting silo overflow messages. I had been downloading > significant amounts of data prior to these messages with no problem. No > changes have occurred to this machine since early March. [...] > Due to prior experiences with USR modems I suspected a heat problem with > the modem. I shut it off, pointed a small desk fan at the device and > waited a bit. About 10 minutes later, the modem functioned with no silo > overflows. Good eye. > My question is; could a heat problem with an external modem manifest > itself as an silo overflow? I know diagnosing heat related problems is > not an exact science, but the cause/effect/workaround of this case > _seems_ pretty clear. My anecdotal experience with USR and heat > problems tends to reinforce my guess. > It could be coming through as problems with flow control or as garbled data. > I'm more concerned with avoiding these sort of problems than saving > money; what brands/models of external asynchronous modems would you > recommend for FreeBSD? I like Supras myself, but the last modem I bought for myself was the SupraFAXModem 28.8, which came in a small aluminum case that could keep your coffee warm if left running for a while. :-) I suppose it had good heat dissipation then. Doug White Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve http://gladstone.uoregon.edu/~dwhite | www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message