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Date:      Wed, 5 Nov 1997 20:50:51 -0500 (EST)
From:      Evan Champion <evanc@synapse.net>
To:        Brian Somers <brian@awfulhak.org>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: sio buffer overflows 
Message-ID:  <Pine.BSF.3.96.971105204554.14865A-100000@cello.synapse.net>
In-Reply-To: <199711060008.AAA03991@awfulhak.demon.co.uk>

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On Thu, 6 Nov 1997, Brian Somers wrote:

> What's a 16650 (is this the thing w/ the 256 byte FIFO) ?

32 byte, on-chip flow control and 460.8 Kbps max port speed.

> ppp doesn't support multilink PPP yet.

This is a Bitsurfr Pro which takes care of the multilinking and passes a
pure PPP datastream to the serial port.  The software needn't know or care
about multilinking.
 
> If the port speed is set to 57600, then that's the maximum data rate 
> (although you may get more if you're using PREDICTOR1 and/or VJ 
> compression).

No, 16650's run the port at 4x whatever speed you set it to.  So a port
set at 57600 is treated as 230.4 Kbps.  It is a rather nice way of getting
around software that doesn't understand the higher port speeds and works
everywhere.
 
Evan




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