Date: Fri, 28 Jun 1996 15:45:25 -0400 (EDT) From: Chuck Robey <chuckr@Glue.umd.edu> To: "Jacob M. Parnas" <jparnas@jparnas.cybercom.net> Cc: Kevin Swanson <Kevin_Swanson@blacksmith.com>, freebsd-hardware@freebsd.org Subject: Re: muliport boards - building a PPP dialup server Message-ID: <Pine.OSF.3.91.960628154114.1057E-100000@thurston.eng.umd.edu> In-Reply-To: <199606281933.PAA04484@jparnas.cybercom.net>
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On Fri, 28 Jun 1996, Jacob M. Parnas wrote: > > In message <Pine.OSF.3.91.960628143531.1057C-100000@thurston.eng.umd.edu>you write: > >On Fri, 28 Jun 1996, Kevin Swanson wrote: > > > >> I was told by Digi that their "dumb" 8-port boards (PC/8), could only go up > >> to 19.2 KBps if you used 16550's. This doesn't sound right based on some of > >> the responses I've been getting. > > These days, a multiboard should at least do 115200baud in my opinion. At > least it can be competitive with modems. 8x115200baud is still only 1/8 > MB/sec and 16x115200 is only 1/4 MByte/sec. Not exactly fast. You notice he referred to the "dumb" 8 port digiboards? They were much cheaper than the intelligent ones, and serve many applications perfectly well, but since they have no onboard intelligence or buffering (beyond that allowed by the 16550 fifos) they won't make it to 115200, at least not on all 8 ports at the same time. > > Jacob > ----------------------------+----------------------------------------------- Chuck Robey | Interests include any kind of voice or data chuckr@eng.umd.edu | communications topic, C programming, and Unix. 9120 Edmonston Ct #302 | Greenbelt, MD 20770 | I run Journey2 and n3lxx, both FreeBSD (301) 220-2114 | version 2.2 current -- and great FUN! ----------------------------+-----------------------------------------------
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