Date: Thu, 19 Oct 1995 13:52:29 -0400 From: dennis@etinc.com (dennis) To: Joe Greco <jgreco@brasil.moneng.mei.com> Cc: hackers@freebsd.org Subject: Re: Bragging rights.. Message-ID: <199510191752.NAA27991@etinc.com>
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>> Actually the bitsurfers can be gotten for well under $300. and our ET/5025 with >> RS-232 interface is $400. So you're talking under $700. for a lot more bandwidth >> and none of the async CPU overhead. Plus if you wanted to go to 56k or frame or >> frac T1 you'd already have your adapter card. > >Aside from the avoidance of CPU overhead, what does the ET/5025 buy me? > >(I don't understand "a lot more bandwidth" - I can definitely do 115200 with >a 16550, and since terminal adapters generally cannot do 128000 speeds in >async mode, the ET/5025 would be limited to the same speed... certainly no >more bandwidth at all....). > >Now if you can find yourself a TA that can do 230.4 or 460.8, and the >ET/5025 is able to do that in async, that might be a benefit. I've >retrofitted 16550 ports to run at such speeds and the CPU does eventually >reach a point where it has difficulty keeping up on a consistent basis >(although this is more likely a driver issue...?) 115k minus 20% async overhead.....Mostly I've heard about 70k or so for async links....If you don't think that 20-30% is worth an extra hundred dollars, then I guess you're entitled to that. It is, however, a consideration. Dennis ---------------------------------------------------------------------------- Emerging Technologies, Inc. http://www.etinc.com Synchronous Communications Cards and Routers For Discriminating Tastes. 56k to T1 and beyond. Frame Relay, PPP, HDLC, and X.25
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