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| Computers Forum Index » Computer - DCOM - ISDN » ISDN extension wiring... |
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| Stuart March... |
 Posted: Wed Jun 25, 2008 9:16 am |
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We've recently done an install for a customer WAN, a Cisco router with
ADSL for primary WAN connection, and ISDN for backup. Where BT had
to provide the lines in to the customers premises, was some 200m from
there the router kit would be installed, so our cabling engineers ran
CAT-5 extensions to where the router would live.
The ADSL works fine over this extension, the ISDN does not. The
router shows a L1 down on a "sh isdn status". If we move the router
and plug directly in to the ISDN wallbox, it comes up and works fine -
so it's the extension run we've installed.
We know the extension run for the ISDN is good - that's been verified.
Reading up on these ISDN wallboxes, BT state if you're going to do an
extension, you need to use a “type 2 wall socket” at the extension
end. (and flick the DIP switch so Termination is disabled (postion:
out).
Does anyone know what a “type 2 wall socket” is ? Or where we can
buy one in the UK? I've had a look round obvious place, Maplin, etc,
but no joy yet. Not getting very far with BT either.
Unfortunately, the equipment can't be moved closer!
Thanks, Stuart. |
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| David Lesher... |
| Posted: Thu Jun 26, 2008 2:57 am |
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Stuart March <stu at (no spam) kerridge.com> writes:
Quote: Does anyone know what a =93type 2 wall socket=94 is ? Or where we can
buy one in the UK? I've had a look round obvious place, Maplin, etc,
but no joy yet. Not getting very far with BT either.
Unfortunately, the equipment can't be moved closer!
I don't even know what country this is....
Is this U or S/T wiring? (Is there an external NT1?)
If S/T, I recall a requirement for terminating resistors...
--
A host is a host from coast to coast.................wb8foz at (no spam) 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 |
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| Posted: Thu Jun 26, 2008 4:10 pm |
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On Jun 26, 3:57 am, David Lesher <wb8... at (no spam) panix.com> wrote:
Quote: Stuart March <s... at (no spam) kerridge.com> writes:
Does anyone know what a =93type 2 wall socket=94 is ? Or where we can
buy one in the UK? I've had a look round obvious place, Maplin, etc,
but no joy yet. Not getting very far with BT either.
Unfortunately, the equipment can't be moved closer!
I don't even know what country this is....
Is this U or S/T wiring? (Is there an external NT1?)
If S/T, I recall a requirement for terminating resistors...
--
A host is a host from coast to coast.................wb8... at (no spam) 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
Hi David, I did mention the UK, in my text above. I think you're
right, also read somewhere about "terminating resistors"... if I could
just find the product that had these in, and where I can buy, I'd be
on to a winner!
Thanks for your help so far. |
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| David Lesher... |
| Posted: Thu Jun 26, 2008 6:34 pm |
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emlynfluff at (no spam) googlemail.com writes:
Quote: Hi David, I did mention the UK, in my text above. I think you're
right, also read somewhere about "terminating resistors"... if I could
just find the product that had these in, and where I can buy, I'd be
on to a winner!
I missed that midst the mess of rich text.
A quick Google search shows that the resistors are 100 ohms, You must
disconnect the ones in the NT1, and change a switch in it to "LONG". You
do not need a fancy socket, just put them in the right place.
Another issue: How did you pair the cable? It's NOT how you would for
Ethernet.
You said "the equipment can not be moved" but it was not clear if that
was your router or the NT1... or both. The easy solution is to move the
NT1 to your router, and make the S/T bus one metre long... BT may object,
if they notice....
[Note that NT1 is a US term; there may be different one used there...]
--
A host is a host from coast to coast.................wb8foz at (no spam) 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 |
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| Phil McKerracher... |
| Posted: Sun Jun 29, 2008 2:07 am |
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Quote: Stuart March <s... at (no spam) kerridge.com> writes:
Does anyone know what a =93type 2 wall socket=94 is ? Or where we can
buy one in the UK? I've had a look round obvious place, Maplin, etc,
but no joy yet. Not getting very far with BT either.
Unfortunately, the equipment can't be moved closer!
RS sell them (http://uk.rs-online.com) - just search for "ISDN"
My ISDN tutorial at http://mckerracher.net/isdn might be of interest as
well.
--
Phil McKerracher
www.mckerracher.net |
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| Posted: Wed Jul 02, 2008 10:06 am |
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Quote:
RS sell them (http://uk.rs-online.com) - just search for "ISDN"
Hi Phil, thanks! Excellent ISDN tutorial as well, booked marked and
distributed amoungst colleagues.
I assume this is the fellow:
"Plug-in Terminator
The ISDN terminator is a compact ’plug in’ device that ensures the
correct termination of the ISDN basic rate ’S’ bus whilst enabling an
ISDN terminal or terminal adaptor to plug into the wall outlet via the
terminator. Terminating the ’S’ bus externally to the wall ensures
that the wall outlet remains flexible in its future use. The blue
release is a visual indication that this device is an ISDN terminating
adaptor."
(RS Stock No. 242-945) |
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| Posted: Wed Jul 02, 2008 3:49 pm |
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