Date: Sat, 29 Jun 1996 01:48:16 -0400 From: "Jacob M. Parnas" <jparnas@jparnas.cybercom.net> To: Henry Spencer <henry@zoo.toronto.edu> Cc: hardware@freebsd.org, bsdi-users@bsdi.com Subject: Re: muliport boards - building a PPP dialup server Message-ID: <199606290548.BAA06076@jparnas.cybercom.net> In-Reply-To: Your message of Fri, 28 Jun 1996 20:05:50 EDT. <Pine.3.89.9606282029.B9017-0100000@zoo.toronto.edu>
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In message <Pine.3.89.9606282029.B9017-0100000@zoo.toronto.edu>you write: >> I'm confused. I thought the 16550 was good up to 115,200 baud, but when >> ISDN eventually takes over with compression, ~512kbaud will be the norm. >> I don't know if they can handle that... > >Why bother trying to make them handle it? Ethernet is a much nicer way >to connect to high-speed networks (or even not-so-high-speed ones like >ISDN), given that there has to be an interface gadget of some kind between >you and the network anyway. UARTs are for low speeds. > > Henry Spencer > henry@zoo.toronto.edu Henry, The TI 17550 can go up to 900kbaud/second, which is a new UART. Why connect at high speeds with a UART: money. Most ethernet solutions cost well over $1000 not counting the ethernet hardware which may not be at home. (card, tranceiver or hub, cables, etc). I've seen a PC Card that costs $199-$319 depending on who you are, and it does everything with a UART on top (the software driver for BSDI will be $95. So, how does $400 sound to you compared to the ethernet solution, considering that the $400 non-ethernet solution compare to an ethernet one. You can get up to 512 Kbaud/second with it, it has 3 types of compression and header compression (Stac, Ascend and Microsoft) and can change from two BRI channels down to one and vice versa as the other channel is used for voice fax, analog modem, phone, etc. Pretty good in my opinion. Jacob
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