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Date:      Fri, 12 Jan 96 15:02:53 +0100
From:      garyj@frt.dec.com
To:        jkh%freebsd.org@inet-gw-1.pa.dec.com
Cc:        hackers%freebsd.org@inet-gw-1.pa.dec.com
Subject:   Re: Status of ISDN drivers 
Message-ID:  <9601121402.AA28614@cssmuc.frt.dec.com>
In-Reply-To: Message from "Jordan K. Hubbard" <jkh@time.cdrom.com>  of Fri, 12  Jan 96 01:44:29 PST.

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jkh@time.cdrom.com writes:
> > What do you mean by 'sync'?  Do you really want to get down to layer
> > 2?  In any case, you would only need one board: they handle a complete
> > BRI.
> 
> I mean I want to run 8 bit bytes down the line, not 10 bit bytes. :-)
> Clocked serial.  Synchronous serial.
> 
this is IP over HDLC, the bytes all have 8 bits :) It's completely
transparent and demand-dialed, very simple.

> I'd also need two cards - I manage both ends of the link, right? :-)
> I wouldn't mind moving the serial load off of freefall anyway.
> A semi-intelligent ISDN card could be stuck into a number of different
> machines at WC.
> 
ah, yes, you'd need a card in freefall ! The Teles card can use 2
B-Channels. I'm not certain that the existing kernel code will do
channel bundling, though. Sure would be interesting to try it.
And it would *really* be nice to have someone in the US test the ISDN
stuff !

WRT getting 128kb/sec. I though the RBOCs in the States only support
56kb/sec. per channel ? How you going to squeeze 128kb/sec. out of that ?
The D-Channel is not used for data transfer (that would be an additional
16kb/sec.).

---
Gary Jennejohn				(work) gjennejohn@frt.dec.com
					(home) Gary.Jennejohn@munich.netsurf.de
					(play) gj@freebsd.org





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