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Date:      Tue, 26 Jan 1999 20:56:36 -0600 (CST)
From:      Avalon Books <avalon@advicom.net>
To:        Bert Driehuis <bert_driehuis@nl.compuware.com>
Cc:        "H. Eckert" <ripley@nostromo.in-berlin.de>, freebsd-isdn@FreeBSD.ORG
Subject:   Re: I4B support for US ISDN?
Message-ID:  <Pine.BSF.4.05.9901262046080.27446-100000@vespucci.advicom.net>
In-Reply-To: <Pine.SUN.3.95q.990127030419.26724A-100000@dewmoth>

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On Wed, 27 Jan 1999, Bert Driehuis wrote:

> All of this of course just adds to the confusion, as the connector doesn't
> tell you whether or not the NT1 is integrated or not. The US equipment
> I've seen does label the connector "U", so looking at that might help. I
> seem to recall that US ISDN devices call the S0 interface "S/T", but don't
> take my word for it. I'm a European.

   Correct. Our ST interface is RJ-45 only. But the U interface can be
either RJ-11/RG-59 (4-pin modular) *or* RJ-45 (8-pin  modular)--
manufacturers over here can't seem to make up their minds which one they
like more, though most TA's and router are equipped with both U and ST
interfaces, and many are equipped with POTS ports (Plain Old Telephone
System) for analog devices.

   The U interface is right off the switch--no termination or anything,
and requires an integrated NT-1 to use. The ST (SO) interface and POTS
ports are (essentially) just like European version.

R. Pelletier
Sys Admin, House Galiagante
We are a Micro$oft-free site


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