Date: Sat, 13 Jan 1996 09:22:25 +0100 (MET) From: grog@lemis.de (Greg Lehey) To: terry@lambert.org (Terry Lambert) Cc: gjennejohn@frt.dec.com, hackers@FreeBSD.org Subject: Re: Status of ISDN drivers Message-ID: <199601130822.JAA19572@allegro.lemis.de> In-Reply-To: <199601122138.OAA20878@phaeton.artisoft.com> from "Terry Lambert" at Jan 12, 96 02:37:59 pm
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Terry Lambert 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. >> >> 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. > > I thought you meant you wanted to bond two 56k channels... so he's not > the only one who was confused. I thought he wanted to bond two 64k channels. That's what the card supports. A standard Basic Rate Interface has two 64 kb B channels (for data) and a 16 kB D channel (for signalling). At the risk of repeating myself, many RBOCs can't handle this configuration and chop one bit per byte off the B channel to simulate a D channel, leaving only 56 kb/s bandwidth for the B channels. In another mail, I seriously doubted that the current software would be able to handle this configuration. Greg
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