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000009_isdn-distribution-owner_Thu Jan 7 05:31:41 1993.msg
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Received: from nac.no ([129.240.2.40]) by relay.cs.toronto.edu with SMTP id <150201>; Thu, 7 Jan 1993 05:31:27 -0500
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Thu, 7 Jan 1993 10:46:42 +0100
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Wed, 6 Jan 1993 19:20:43 +0100
Date: Wed, 6 Jan 1993 13:20:43 -0500
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From: " (k1io, FN42jk)" <goldstein@carafe.tay2.dec.com>
Message-ID: <9301061611.AA19330@flashy.tay2.dec.com>
To: isdn@teknologi.agderforskning.no
Subject: Re: Greetings from a new member.
X-Vms-To: US1RMC::"72065.520@CompuServe.com"
X-Vms-Cc: SMTP%"isdn@teknologi.agderforskning.no"
Ray Fleischmann asks,
>Can a computer with one ISDN BRI connection make and
accept multiple connections whith all conections active, none put on a hold
status. [?]
A BRI is an interface, not a connection. One BRI can simultaneously
(if the line is so configured; not all are) support two B-channel
connections, independent of one another, in circuit mode. It can also
use one of the B channels, if so configured, for packet mode (X.25),
in which case multiple virtual circuits can be active at once. And
it can also, if so configured, use the D channel (16 kbps) for packet
mode (X.25), regardless of what the B channels are doing.
Last night I was debugging a router. I had a modem call into the router
on one B channel and a bridged Ethernet connection to one side of the
router on the other B channel. That's two connections at once. I suppose
I could have used D channel packet, were it hooked up, as well.
Anything fancier than this can't fit into the bandwidth of BRI.
fred