PRI D- Channel not working.

[TheDoz]

Hello all,
I have a 406 v2 with 3.2 (54)
1 single PRI with 8 channels used, other channels are set to out of service.
PRI is down and the PRI provider says that the D-channel is out on our end and that it is our problem.
I am receiving yellow and red alarms in system status.
System monitor says Pri Line 1 Down.
We switched out the PRI card with a new one and still the same thing.
Switched out the ip 406 and still the same thing.
There is a slim chance that the PRI card is bad(new One).
Tried both the old and new card in each system and still no go.
Could the problem be in the provisioning of the PRI?
Or could it be in the AT& T ckt?
AT&T is supposed to come on site and check the D-channel first thing in the morning.
Any Suggestions
Thanks

"The lack of money is the root of all evil"

 

[jamie77]

Use a Trend and test the kit and the telco. That would have been my first thing rather than swapping kit out.

In the UK BT ALWAYS say it is our kit but 99.99% of the time it isn't!!

Jamie Green

ACA:Implement - IP Office
ACS:Implement - IP Office

http://www.alliedcom.co.uk

Football is not a matter of life and death-It is far more important!!!!

 

[TomMills]

yellow alarms indicate a transmission problem

red alarms are lost sync

seems very unlikely that you have 2 bad cards and 2 bad 406s, have you walked under any ladders lately?

surely one combination of cards/units would work if it wasnt a problem line side.

are you getting trunk lights on the 406?

get a patch lead and cut the end of, ditch the greens and brown pairs. connect white/orange to blue and white/blue to orange. plug nit into the pri card, and if you nget a trunk light i would say the card is ok

 

[TomMills]

or use a trend as jamie says if you are lucky enough to have one!!

 

[TheDoz]

I get a trunk light when they do a loopback test. when they are not looping back their is no light on the ip office.
I do not know what a trend is.
Monitor says trunk status is Dormant or unknown Line down.
They say the pipe is good just no D-channel working.
I will know more this morning when they come and test the d-channel with thier equipment.
Thanks for the replies.


"The lack of money is the root of all evil"

 

[tlpeter]

Easy to test

Make a dial in connection
If you left that all default then you only need to know the number and add the 192.168.99.2 or higher address in your dial in connection

If you can dail in it work if you can't you do it wrong or it doesn't work


ACA - Implement IP Office
ACS - Implement IP Office
ACA - Voice Services Management
______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!

 

[jamie77]

A Trend is a manufucturer of ISDN test equipment. I would say it is pretty standard for any BP to have one that can do PRI and BRI. QSIG/DPNSS/DASS II are also handy every blue moon. They are expensive (around £4000/$8000) new. We got ours from ebay for £550.

They can be used to emulate the phone system or the Telco to prove which one is up the spout.

Jamie Green

ACA:Implement - IP Office
ACS:Implement - IP Office

http://www.alliedcom.co.uk

Football is not a matter of life and death-It is far more important!!!!

 

[tlpeter]

IPO site is easy to check

PRI cart can be tested by plugging in a RJ45 with loops in it 1-2 to 4-5

BRI the same story but then 4-5 to 3-6

The light should burn when alright


ACA - Implement IP Office
ACS - Implement IP Office
ACA - Voice Services Management
______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!

 

[TheDoz]

It loops back and and At&T can loopback our system and they can send 1's and 0's. Only that the D-channel is not working. Either there is a provisoning problem or I have a new PRI card that is bad.
Thanks

"The lack of money is the root of all evil"

 

[Westi]

I had this a few times and EVERY time the line provider was full of it and had some restrictions on the line and they just didn't check it properly. Loopbacks don't check the D-channel as far as I know so if you provide them with a loopback they can only test the actual physical portion of the line for connectivity.
Being short of any ideas on how to go from here without the testing equipment try changing the NI2 to 5ESS or vice versa.



Joe W.

FHandw., ACA, ACS

If you can't be good, be good at it!

 

[kwing112000]

Where do they ahve the D-chan. is it in slot 24. that is the only place it will work. I have seen them move it to other channels on partial PRI before.

Kevin Wing
ACA- Implement IP Office
Carousel Industries

 

[TheDoz]

Hello fellow tek-tippers,

First thing this morning the T1 is working. AT&T found a problem on their end that they hadn't run accross before.
All is well after being down 2 days.
The customer said to bill them and they are going to pass the bill to AT&T.

Thanks for all of your help and suggestions.

The lesson here is that even though the T1 line tested good, the D-channel can have a problem causing the PRI card to be out of service.
Thanks again



"The lack of money is the root of all evil"

 

[jamie77]

Never trust the line test the Telcos' run. I have has Bt run tests on lines and come back good when the line doesn't even have power at the customer premises!!!!

Jamie Green

ACA:Implement - IP Office
ACS:Implement - IP Office

http://www.alliedcom.co.uk

Football is not a matter of life and death-It is far more important!!!!

 

[TomMills]

BT are the worst for things like this, always threatening to charge if they come out and it turns out to be the pbx.

 

[jamie77]

To be fair, so do we if it turns out to be the lines. We always get the Telco to check first.

Jamie Green

ACA:Implement - IP Office
ACS:Implement - IP Office

http://www.alliedcom.co.uk

Football is not a matter of life and death-It is far more important!!!!

 

[mattKnight]

BT have started being sneaky...

They fix the line issue external to the building THEn send an engineer to site, to report there is no issue....

Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[TomMills]

Thats well sly!

 

[TheDoz]

The PRI provider came out twice and checked the line first at the d-mark and said the line checks good and its in your equipment. Thats when we changed out the PRI the next day. The problem was still their after replacing the card. So we called them back out and they tested line at the phone system itself and they said the line is ok but the d-channel was not working (Their tester was not capable of testing the d-channel). So we replaced the IP Office and tried each of the PRI cards in the new system and still no go. We called them and requested that they send someone out to test the D-channel and they said they would the next mornig. The next morning came and all is well, because they found an unusaul problem taht they had'nt seen before.
Meanwhile the customer was debating wheather to go to another vender or and another PRI provider.
Everybody's happy for now.

"The lack of money is the root of all evil"

 

[amriddle01]

As long as you assume that whatever a line provider says is a bare faced lie, you won't go far wrong.

ACS - IP Office Implement