atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Telecom Service & Providers Caller id issue

I have a sub who is having an issue with caller id and no one seems to know the answer. He is a winback from a reseller and his dialtone was provided to him previously on T1 or ISDN Prime. He switched to us in Oct. and on 6 of his lines, intermittantly, caller id does not work. There is no rhyme or reason to the trouble. It has been proven into the Siemens switch in the office, but no one seems to know how to fix it. For giggles, we tested other lines in the office, and the caller id never failed. Translations are correct on these lines. Help!!

previously a pri? now analog?

how are the lines being handed off their switch?

you need to post more detail.

previous carrier? new carrier?

if analog, voltage?

^^^
I agree with rustynails, more info is needed to narrow this down (be long winded, it helps here ).

How intermittent? (i.e. - 1 out of 5 calls, or once a day/week/etc.)

Is it one single C.O. line that has the problem... or multiple?

(If it is one single POTS, then swap it with another C.O. position, to see if the problem follows the line)

Who is the new/old provider & how many total lines/CKT's?

It is affecting at least 7 lines. It is intermittant. One line failed after one test. Another worked 25 times, and failed on the 26th. Previous carrier was AT&T Legacy. New carrier is at&t. As far as how it worked previously, I could only go by what the customer thinks it worked on(he said T1). We can not located old facilities. Office equipment has been changed, but problem followed it. I have spent parts of 4 days on this and at first, was sure the trouble was in the customers system. I initially tested each line 5 times with no failure. It was only when I tested on line 20 times, when I saw the info. was not getting to the test set. Again, the trouble has been proven into the central office. Spent all day yesturday testing all lines and they all failed at one point or another. They are all regular pots lines. This job has been escalated to the Siemens switch people, so I may never find out what the trouble was. Almost seems to me as though the data burst is either not being sent, or getting lost somewhere. I apologize, but my c.o. knowledge is very limited.

As long as you know the problem occurs at the Demarc, without the CPE attached, then your knowledge of the C.O. can end there

My next suggestion, was buy "X" - CID units (X = # of lines) and wire them ahead of the CPE and at the end of the day compare the info on them, with the info stored on the system and see what the difference is.

Good luck, hope they fix it!

Let us know if they detail the problem for you.

Distance from CO can cause intermitten CID failure, although I wouldn't think that would be the case here. You say the troubles been proven to the CO. Your job is done. We do have several CO techs on the board, maybe one of them will have an idea.

I agree the problem is no longer mine, having proved it into the central office, I just thought someone, somewhere may have come across a problem like this. We were on the line with tech support in the Siemen switch, and they were no help. Just trying to take care of the customer.

When you say that you proved the problem to the C.O. are you saying that the tech in the C.O. actually got the failure at the frame or are you saying you got the failure at the demarc? I never ran across an intermittent Caller ID being caused by the switch, although my experience has been limited to DMS & 5E. I strongly suspect the local loop.
Use a basic (cheap) Caller ID box to prove things at the demarc. That is what the phone company tech will use. Iif he doesn’t get a failure on his set, he probably going to give the problem back to you. Good luck.

I am the outside tech for at&t. I proved it is intermittantly not working at the oe.

By failure, do you mean ALL info is not received, or SOME info is not received?

What does the CID display say?

Can you monitor the lines with a butt-set or equivalent, and try to hear the FSK being delivered? Do you hear it at all, on a failure?