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Date:      Mon, 22 Jan 2001 02:01:36 -0800
From:      "Ted Mittelstaedt" <tedm@toybox.placo.com>
To:        "'Dru'" <genisis@istar.ca>, "'James Wilde'" <james.wilde@telia.com>
Cc:        <freebsd-questions@FreeBSD.ORG>
Subject:   RE: OT: ISDN and TCP/IP
Message-ID:  <011e01c0845a$4f6954c0$1401a8c0@tedm.placo.com>
In-Reply-To: <Pine.BSF.4.21.0101211559210.12156-100000@genisis>

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Hi All,

  I have one bit of advice for you!  Run, not walk, to Ebay
and buy yourself a used Ascend Pipeline 75 and use that for
your ISDN indial.  It shouldn't cost more than $75 or so
and you will save yourself an enormous amount of headache.

Ted Mittelstaedt                      tedm@toybox.placo.com
Author of:          The FreeBSD Corporate Networker's Guide
Book website:         http://www.freebsd-corp-net-guide.com


>-----Original Message-----
>From: owner-freebsd-questions@FreeBSD.ORG
>[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Dru
>Sent: Sunday, January 21, 2001 1:03 PM
>To: James Wilde
>Cc: freebsd-questions@FreeBSD.ORG
>Subject: Re: OT: ISDN and TCP/IP
>
>
>
>Hi James,
>
>You may find the ISDN and PPP articles at the following link helpful:
>
>http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/index.htm
>
>They're fairly technical, but may provide the missing bit of 
>info you're
>looking for. BTW, all articles at that link make very good 
>reading and can
>be downloaded in PDF format.
>
>Cheers,
>
>Dru
>
>
>On Sun, 21 Jan 2001, James Wilde wrote:
>
>> I'd appreciate being allowed to tax the accumulated 
>experience and knowledge
>> with the following question.
>> 
>> My company has a modem pool which accepts incoming calls 
>from both analog
>> and ISDN modems.  I have a D-Link router behind my ISDN box 
>but no ISDN
>> modem.  I would like to be able to call the modem pool and 
>connect into our
>> network.  However it doesn't work with a simple dial-up by 
>the router onto
>> the network.
>> 
>> Now I know the experts are probably rolling about on the 
>floor laughing at
>> this point, but I would like to know what it is that 
>prevents this kind of
>> contact from working, and whether there is a software 
>solution available.
>> 
>> As I see it, ISDN is merely a carrier, just like the analog 
>lines, and I
>> can't see that an ISDN modem is going to transmit the 
>information by sending
>> beeps at 900 hz and 1.3 khz, or whatever the frequencies 
>are, as the analog
>> lines do.  I am assuming that an ISDN modem converts the 
>digital TCP/IP
>> packets coming from the computer to another digital format for ISDN
>> transmission, whereupon some part of the modem pool at the other end
>> converts the ISDN signals back into TCP/IP.
>> 
>> Thanks for any direct or indirect (e.g. URLs) help with this 
>one, which has
>> been puzzling me for a while.
>> 
>> mvh/regards
>> 
>> James
>> 
>> 
>> 
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>> 
>> 
>> 
>> 
>
>
>
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