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  • ISDN boxes outside

    From Marco Moock@mm+usenet-es@dorfdsl.de to comp.dcom.telecom on Sun Oct 8 14:14:43 2023
    From Newsgroup: comp.dcom.telecom

    Hello!

    https://www.markloveless.net/blog/2020/8/28/tales-from-the-past-dealing-with-atampt
    That article mentions ISDN boxes outside of the house in the US.

    I am from Germany and I don't know about them. Here ISDN terminators
    (called NTBA) are mounted inside. They had the 2-wire Uk0 Bus at the
    carriers side and the S0 bus on the customers side and were connected
    to the TAE telephone socket, so no technician needed to come home when
    ISDN was ordered.

    What are exactly these ISDN boxes referred in the article?
    What came out at the customers side?
    An S0 bus or something else?
    --
    kind regards
    Marco

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  • From Michael Trew@anonymized@att.net to comp.dcom.telecom on Sun Oct 8 23:06:22 2023
    From Newsgroup: comp.dcom.telecom

    On 10/8/2023 8:14 AM, Marco Moock wrote:
    Hello!

    https://www.markloveless.net/blog/2020/8/28/tales-from-the-past-dealing-with-atampt
    That article mentions ISDN boxes outside of the house in the US.

    I am from Germany and I don't know about them. Here ISDN terminators
    (called NTBA) are mounted inside. They had the 2-wire Uk0 Bus at the
    carriers side and the S0 bus on the customers side and were connected
    to the TAE telephone socket, so no technician needed to come home when
    ISDN was ordered.

    What are exactly these ISDN boxes referred in the article?
    What came out at the customers side?
    An S0 bus or something else?

    I'm not quite sure. Most telco's have their newer plastic demarc box on
    the outside of the home here. I've still seen older homes with the
    2-wire solid core non-twisted pair (looks like a lamp cord) going inside
    to the old ceramic fused demarc, which is grounded to the cold water
    line, and mounted to a wooden stud in the cellar ceiling.

    I coerced the AT&T tech to put the new plastic demarc box for the phone
    and ADSL into the cellar of my home, instead of drilling an unsightly
    plastic box into the exterior brick of my home. They put a new twisted
    drop line in, and I replaced the interior wiring, with a whole-home ADSL filter. Lucky for me, I have a clear phone line in all weather.

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  • From Fred Goldstein@anonymized@interisle.net to comp.dcom.telecom on Mon Oct 9 11:53:29 2023
    From Newsgroup: comp.dcom.telecom

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    On 10/8/2023 8:14 AM, Marco Moock wrote:
    Hello!

    https://www.markloveless.net/blog/2020/8/28/tales-from-the-past-dealing-with-atampt
    That article mentions ISDN boxes outside of the house in the US.

    I am from Germany and I don't know about them. Here ISDN terminators
    (called NTBA) are mounted inside. They had the 2-wire Uk0 Bus at the
    carriers side and the S0 bus on the customers side and were connected
    to the TAE telephone socket, so no technician needed to come home when
    ISDN was ordered.

    What are exactly these ISDN boxes referred in the article?
    What came out at the customers side?
    An S0 bus or something else?

    Honestly, I don't recognize those boxes either, and I was very deeply
    involved in US ISDN.

    In the US, the BRI handoff was at the U interface, not S/T, and the S/T
    bus was almost never used, except perhaps in some office Centrex
    arrangements. In most cases there was no physical NT1 either; the CPE typically just implemented the US 2B1Q format U interface.
    --
    Fred R. Goldstein k1io fred "at" interisle.net
    Interisle Consulting Group
    +1 617 795 2701

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    <div class="moz-cite-prefix">On 10/8/2023 8:14 AM, Marco Moock
    wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:ufu6fj$3363a$2@dont-email.me">
    <pre class="moz-quote-pre" wrap="">Hello!

    <a class="moz-txt-link-freetext" href="https://www.markloveless.net/blog/2020/8/28/tales-from-the-past-dealing-with-atampt">https://www.markloveless.net/blog/2020/8/28/tales-from-the-past-dealing-with-atampt</a>
    That article mentions ISDN boxes outside of the house in the US.

    I am from Germany and I don't know about them. Here ISDN terminators
    (called NTBA) are mounted inside. They had the 2-wire Uk0 Bus at the
    carriers side and the S0 bus on the customers side and were connected
    to the TAE telephone socket, so no technician needed to come home when
    ISDN was ordered.

    What are exactly these ISDN boxes referred in the article?
    What came out at the customers side?
    An S0 bus or something else?

    </pre>
    </blockquote>
    Honestly, I don't recognize those boxes either, and I was very
    deeply involved in US ISDN. <br>
    <br>
    In the US, the BRI handoff was at the U interface, not S/T, and the
    S/T bus was almost never used, except perhaps in some office Centrex
    arrangements. In most cases there was no physical NT1 either; the
    CPE typically just implemented the US 2B1Q format U interface. <br>
    <br>
    <pre class="moz-signature" cols="72">--
    Fred R. Goldstein k1io fred "at" interisle.net
    Interisle Consulting Group
    +1 617 795 2701</pre>
    </body>
    </html>

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