From owner-freebsd-current Thu Oct 30 09:21:00 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id JAA22533 for current-outgoing; Thu, 30 Oct 1997 09:21:00 -0800 (PST) (envelope-from owner-freebsd-current) Received: from mail.uniserve.com (dns1-van.uniserve.com [204.244.163.48]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id JAA22527 for ; Thu, 30 Oct 1997 09:20:56 -0800 (PST) (envelope-from tom@uniserve.com) Received: from shell.uniserve.com [204.244.210.252] by mail.uniserve.com with smtp (Exim 1.70 #1) id 0xQyGt-0005fN-00; Thu, 30 Oct 1997 09:20:39 -0800 Date: Thu, 30 Oct 1997 09:20:36 -0800 (PST) From: Tom To: Kristian Kennaway cc: FreeBSD Current Subject: Re: Crappy modem upload bandwidth In-Reply-To: <9710301349.AA01649@bragg> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Fri, 31 Oct 1997, Kristian Kennaway wrote: > rates, but it slows to an average of like 50 bps when I try and upload. > What seems to happen is that the modem sends in very short bursts > "bursts" at close to full-speed, then idles for a minute or more before > doing the next one. Before this happened, I had no problems uploading > from my computer.. Sounds like flow control between your computer and modem is not working right. The modem should be set for hardware flow control. What is happening, is that the computer to modem speed is 38400 (probably), but the modem-to-modem speed is 14400. This poses a problem when sending data, as at 38400 the modem's buffers will very quickly fill up. The modem should be using flow control to stop the computer until its buffers drain out. Either the modem isn't using flow control, or the PC isn't listening for it. Tom