Date: Mon, 11 Jan 1999 16:46:39 -0600 (CST) From: James Wyatt <jwyatt@RWSystems.net> To: Quintin Oliver <quintin@smlt.com> Cc: freebsd-questions@FreeBSD.ORG, freebsd-isp@FreeBSD.ORG Subject: Re: Connect speed on FreeBSD. Message-ID: <Pine.BSF.4.05.9901111643040.20962-100000@kasie.rwsystems.net> In-Reply-To: <Pine.LNX.3.96.990111131058.4256A-100000@orion.smlt.com>
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On Mon, 11 Jan 1999, Quintin Oliver wrote: > Date: Mon, 11 Jan 1999 13:16:41 +0000 (GMT) > From: Quintin Oliver <quintin@smlt.com> > Subject: Connect speed on FreeBSD. > > Greetings! > > We run a local ISP powered by FreeBSD 2.2.8 and 3.0, our users connect to > FreeBSD on 2.2.8 on modem dial. The modems are Modular Technologies V.90 > compliant, however, many of our users have reported that they can only > connect at about 31k to 35k a second, that is there actuall connect speed > NOT BANDWIDTH from the net. I've checked our configuation over and over > again, we are using Mgetty and we are asking it to connect the users at > 57600?? Remember that 56K modems are asymetric(sp?) and *ONLY* do 33.6 from an analog transmitter. This means that, unless your server has modems on *digital* circuits (PRI, BRI, T1, etc...) with mostly 8-bit clean paths, you will never get near 56K. If these are both modems plugged into analog POTS ports, you are getting about the best throughput you can expect. I usually tell people that their off-the-shelf modem can only *receive* 56K, but is limited to 33.6 transmit. Hope this helps the understanding. - Jy@ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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