atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services T1's, CSU's and DSU's pri and clipping

I have a Panasonic kxtda 200 with pri running about a block from the 5E CO. We have been receiving RAI alarms about every 2 to 3 days and from time to time see a sync error. This is my first install with a PRI circuit and the provider says that the problem is customer side. (We have replaced the entire system and CSU) They are now complaining about voice clipping on the inbound conversation (ok on the outbound side). And were seeing disconnects until the provider rebuilt the circuit last week.
We had this problem on start up but they changed a voice detection setting to correct it. Now they tell me that all parameters have been checked on their side and to change the pri card again. Am I missing something

2 bad PRI cards? That sounds fishy. Sounds more like a physical T1 problem than a PRI issue. Have they tested the T1 circuit to see if it's good? Have you mage sure you are slaved to them on clocking? RAI comes on when you don't have d-channel negotiaition (24th channel).

I am told that the circuit is fine. Support tell me that slips will cause this issue. I am slaved to the provider for clocking and the circuit is delivered over an atm circuit. Can there be another
clock in this configuration that might be causing these slips??

Well, I have a hard time believing you have 2 bad systems. Remember, on a PRI all it takes is channel 24 to have a problem to cause the whole thing to crap out. You wouldn't have a TBERD would you? I have to say 99.9% of every PRI issue I have ever had was ALWAYS a telco issue of some kind. Check your cables real good and the LBO on the CSU to make sure it's correct.

the csu is an adtran ace and LBO is set ot >133ft.
the smart jack patch cable to the csu patchcable length is 93 feet and certified to 5E standards. We installed a second 5E link, with a different route, and certified it at 89 feet.
I know that a bank across the street has a t1/pri that passes through the dmarc at this customers site. From there we are less than 800 feet to the Central Office where both originate. It is most likely that that cable enters the CO with the same count that it has at this location. Is there any way for another clock on another circuit to show up on our circuit.
We were told that the provider saw timing errors and our equipment is definitly not providing any clock.

I meant less than 133 feet (<) sorry

If the CO can see slips on your side, place a loopback at the demarc (smartjack,etc.) and see if they still see slips. If they do, it's on their side. If no slips, it's on your end.

Very quick hits on the T1 circuit could cause the CPE to briefly lose sync with the C.O.

Can you tell me what "RAI" stands for? (I'm not familiar with Panasonic's business telephone systems).

Remote Alarm Indicator..Means you're receiving a yellow alarm from the far end. I understand by the post that the alarms and errors quit and now have clipping. I've been waiting to see if there are still errors or alarms before I chime in on the clipping.

Just wanted to add. You say you've never installed a PRI. It's still just a T1 as far as testing the facility goes.

I'm curious about the error/alarm situation too.