NI1 or NI2?

[Sarah Brown]

Hi all

I've been trolling around the net looking for a guide to North
American ISDN (I live in Europe)

Unfortunately, even having tried the FAQs, im unable to find the
answer to my question, which is this;

What is the difference between Bellcore's NI1 and NI2 standards? How
are these different to AT&T 5ESS, and is it always necessary to
request from the Telco what switch they operate to ensure your ISPBX
will be compatible?

Thanking you all in advance for any pointers in the right direction,

Alan Mott
alan...@pop.softhome.net

[David Lesher]

sa...@trainers.demon.co.uk (Sarah Brown) writes:

>What is the difference between Bellcore's NI1 and NI2 standards? How
>are these different to AT&T 5ESS, and is it always necessary to
>request from the Telco what switch they operate to ensure your ISPBX
>will be compatible?

Too oversimplifed answer: NI2 is an upgraded NI1.

"Different to AT&T 5ESS" is not clear -- do you mean NI1/2 vs ATT
Custom, or NI1/2 on a 5ESS?

--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

[alan mott]

On 6 Jan 2000 14:01:10 -0500, wb8...@panix.com (David Lesher) wrote:

>sa...@trainers.demon.co.uk (Sarah Brown) writes:
>
>
>>What is the difference between Bellcore's NI1 and NI2 standards? How
>>are these different to AT&T 5ESS, and is it always necessary to
>>request from the Telco what switch they operate to ensure your ISPBX
>>will be compatible?
>
>Too oversimplifed answer: NI2 is an upgraded NI1.

Thanks. I'd had it suggested to me that NI 1 was Basic Rate and NI2
was Primary Rate. I guess thats wrong.

>
>"Different to AT&T 5ESS" is not clear -- do you mean NI1/2 vs ATT
>Custom, or NI1/2 on a 5ESS?

Since posting Ive found stuff on the web that suggests, but doesnt
seem to state explicitly, that 5ESS is a switch/CO exchange. Is this
the case?

Can you point me to a site that gives an overview of ISDN protocols in
the US?
Many thanks again for your help.

Alan

[Robert Blackshaw]

alan mott <al...@trainers.demon.co.uk> wrote in message
news:3875a9cc...@news.demon.co.uk...

> On 6 Jan 2000 14:01:10 -0500, wb8...@panix.com (David Lesher) wrote:
>
> >sa...@trainers.demon.co.uk (Sarah Brown) writes:
> >
> >
> >>What is the difference between Bellcore's NI1 and NI2 standards? How
> >>are these different to AT&T 5ESS, and is it always necessary to
> >>request from the Telco what switch they operate to ensure your ISPBX
> >>will be compatible?
> >
> >Too oversimplifed answer: NI2 is an upgraded NI1.
>
> Thanks. I'd had it suggested to me that NI 1 was Basic Rate and NI2
> was Primary Rate. I guess thats wrong.
> >

Close - PRI was added by N-ISDN2, but there were a few other goodies as well
in the way of changes to BRI. Again I would refer you to my ISDN workbook at

www.veda-home.com/Blackshaw

I must warn you that if you attempt to print it on a colour laser or deskjet
to
have s[pare toner/cartridges on-hand :-)

Bob

[John Agosta]

Get the Bellcore document SR-NWT-002006 "National ISDN."
It's free.
It explains the migratory path of NI1-NI2-NI3 etc., and gives you the big
picture.

-ja

David Lesher wrote:

> sa...@trainers.demon.co.uk (Sarah Brown) writes:
>
> >What is the difference between Bellcore's NI1 and NI2 standards? How
> >are these different to AT&T 5ESS, and is it always necessary to
> >request from the Telco what switch they operate to ensure your ISPBX
> >will be compatible?
>
> Too oversimplifed answer: NI2 is an upgraded NI1.
>

> "Different to AT&T 5ESS" is not clear -- do you mean NI1/2 vs ATT
> Custom, or NI1/2 on a 5ESS?
>

[Thor Lancelot Simon]

In article <855toi$ioa$1...@bob.news.rcn.net>,

Robert Blackshaw <blac...@erols.com> wrote:
>
>alan mott <al...@trainers.demon.co.uk> wrote in message
>news:3875a9cc...@news.demon.co.uk...

>> On 6 Jan 2000 14:01:10 -0500, wb8...@panix.com (David Lesher) wrote:
>>
>> >sa...@trainers.demon.co.uk (Sarah Brown) writes:
>> >
>> >
>> >>What is the difference between Bellcore's NI1 and NI2 standards? How
>> >>are these different to AT&T 5ESS, and is it always necessary to
>> >>request from the Telco what switch they operate to ensure your ISPBX
>> >>will be compatible?
>> >
>> >Too oversimplifed answer: NI2 is an upgraded NI1.
>>

>> Thanks. I'd had it suggested to me that NI 1 was Basic Rate and NI2
>> was Primary Rate. I guess thats wrong.
>> >
>
>Close - PRI was added by N-ISDN2, but there were a few other goodies as well
>in the way of changes to BRI. Again I would refer you to my ISDN workbook at

Wrong.

PRI was *standardized* for the U.S. LECs by NI2. Of course it existed
for almost a decade before this.

--
Thor Lancelot Simon t...@rek.tjls.com
"And where do all these highways go, now that we are free?"

[Robert Blackshaw]

Thor Lancelot Simon <t...@panix.com> wrote in message
news:856jri$qa6$1...@news.panix.com...

My aren't we picky? My statement was that it was "added" to National ISDN
in version 2, of course it existed before, and in several flavours as had
BRI - that's what "N-ISDN" was all about, no?

Bob

[alan mott]

>>
>> >What is the difference between Bellcore's NI1 and NI2 standards? How
>> >are these different to AT&T 5ESS, and is it always necessary to
>> >request from the Telco what switch they operate to ensure your ISPBX
>> >will be compatible?

Many thanks to all of you who responded to my above cry for help. It
was all most useful.

Alan