sundance-communications.com/forum Forums General General Telephone & Systems Information Line noise issues

I cain’t say that only having problems on 3 out of 4 eliminates anything on the Telco side. Before ruling out a Telco pairgain issue I’m thinkin’ this… At the RT (remote terminal) 3 of the 4 circuits could terminate on one R-POTS card and the 4th (without a problem) could terminate on another. Moister may not have an effect on the SLC system BUT temperature changes could.

If it’s a GR-303 pairgain arrangement as anthonyh alluded to, where the RT is directly connected to the local host switch through multiple T1’s… All lines would have an equally probability of hitting the failing T1. Also, in most cases the T1 would have performance monitoring on them that would flag problem automatically. I think that would be unlikely.

Keep tryin’ these lines with a known good analog phone, at the demarc, whenever the problem reappears. Removing you phone system from the equation. If it you hear it there, hammer the Telco until you get resolution.

Thanks,
Bryan

You said 1 line is good, swap that line with one of the bad ones and see if problem follows line if if it stays on same port.

I do not believe I did not think of that..

I agree with bunnie, get an analog test phone connected paralel. When the problem is noticed moved to the analog and cut from system. Ya gotta isolate before you can repair.

Another thing to add to this. We have had our equipment vendor come out and they claim the equipment is fine. Also, as to switching the lines. Lines 1 through 3 are the ones with noise and 4 is fine, but it is a private line going through the switch and would require reprogramming, correct?

Yes, it would require programming to do that unfortunately. It might be worth the expense to isolate this though. If you ask your vendor to use the programming tool under flash 42, it shouldn't take but a few minutes to accomplish.

Yes if the button appearance is only on one phone you'd have to change which button and delete from the others. I'm pretty sure on the STS you can bring out a line appearance on the phone AUX port, someone will correct me if I'm wrong. You could do as Bunnie suggested and put the three lines on three phones and plug plain old phones into those ports. The only problem is if you have the noise on both the system and straight line phone your equipment is still on the circuit. To fully prove in or out you'd have to remove the line from your equipment. You could also eliminate the question of a local carrier on this by asking your supplier if they lines go through a carrier or are straight from the CO.

TL1
When the static problem occurs, are the calls in bound or outbound?
If the call is inbound, are the callers using a toll free number?

The calls are both inbound and out and this happens with all numbers including a toll free one.

If you have checked all tested possibilities with your phone system (switched co cards, recrossconnected CO lines, moved CO line to a working CO port, etc.).
I would try the following:
Contact your local CO vendor and report the same line with the static problem.
Request a vendor meet with your local provider. (All parties should be on site at the same time) Also request to have the “static line” temporary call forward to a known working number. This will give you the opportunity to test the “static line” thru a totally different route. (From the CO to your phone system)
Make several test calls using both phone numbers. (You might want to call both numbers 20 to 30 times)
If the problem follows the forwarding, then the problem is at the CO.
If the problem disappears, the problem is between the CO and the Dmarc.

Most Telco providers will do this free of charge while repairs are being made.

Good Luck!