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Date:      Mon, 19 Apr 1999 18:29:16 -0500
From:      Jim King <king@sstar.com>
To:        Scot Elliott <scot@poptart.org>, stable@freebsd.org
Subject:   Re: High speed serial ports
Message-ID:  <4.1.19990419182606.00968180@mail.sstar.com>
In-Reply-To: <Pine.SOL.4.05.9904191236070.29932-100000@sulu.london.virgi n.net>

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>I'm using a Courier I-Modem in multi-link mode to get a total of a 128K.
>The only obvious problem I've come across is that the serial card's
>highest speed is 119200bps - less than 128K.
>
>I've seen some other serial cards for sale based on the 16750 URART... is
>this supported by FreeBSD at this time, and does anyone know if there are
>any special kernel options I need to make PPP work at the higher bit rate?

The 16650 and 16750 UARTs are backwards compatible with the 16550, although
they also have some extra features that are best supported when the driver
is written to take advantage of them.

I have a card from Byte Runner (http://www.byterunner.com) with a pair of
16650s, and a high speed oscillator.  I used it for a while to run my 3Com
Impact IQ ISDN box at 230400 bps.  It worked great with both Win95 and
FreeBSD, and the card was only $40 or so.  (I'm not using it now because my
current employer bought an Ascend Pipeline for me.)

Jim




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