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Date: 	Thu, 24 Aug 1995 18:39:53 -0700 (PDT)
From: Tom Samplonius <tom@misery.sdf.com>
To: Joe Greco <jgreco@brasil.moneng.mei.com>
cc: Bill Fenner <fenner@parc.xerox.com>, terryl@cs.stanford.edu,
        freebsd-hackers@FreeBSD.org
Subject: Re: ISDN Anyone?
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On Thu, 24 Aug 1995, Joe Greco wrote:

> > Er, forgive me if I'm being obtuse, but don't you need a higher serial rate 
> > than 115200 to get full performance out of 2 B channels?
> 
> Yes.  You get about 90% cap at 115200.
> 
> However, I challenge you to plug a TA into a standard PC serial port and go
> faster than that.  :-)  (The UTA-220 can't hit 230.4K at this point in time
> anyways, so the picture *was* the optimal setup, and a PC serial port can't
> go faster with a standard crystal).

  The Hayes ESP card can do 230.4K, and looks like a regular 16550.  Some 
patches for using the ESP's larger buffers were posted recently.

Tom