ISDN PRI Error Thresholds

[scottyjohn]

Hi all,
We have been having a bit of trouble with our Telco recently. What happens is that we suddenly get a hit on our primary ISDN circuits which causes large amounts of call cutoffs across our centre. When we check our DS1 logs they show a massive amount of errors. We then report this to our telco's fault management team and they investigate. the only trouble is that they see the circuits as running totally clear. I am dealing with one of their senior engineers and he is asking what the tolerances are on our error reporting as he wants to compare them to the network kit as it is a huge problem that they cant see errors which are severe enough to cause loss of service. Can anyone point me in the right direction to find that info? We are running a Definity G3r v8.

Thanks in advance John

http://www.eagle-i.co.uk

 

[TMiyake]

I'm not sure what the tolerances are for the ISDN PRI errors, but I had a similar problem. We were having massive errors on one of 5 PRIs. I called in a trouble ticket with the carrier, and they said everything was fine from the CO to our building. I reran and repunched all of the wires from our MPOE to the PBX, but I still got the errors. I started getting desperate and looking at anything from the back of the card to the MPOE. The problem ended up being that someone "bumped" into the CAT5 cable going from the back of the card to the jack from the MPOE. The original Avaya/Lucent cable is pretty stiff, and when someone "bumped" it, the head started pulling away from the cable. It was hard to see unless you actually moved the cable. Sometimes it had a good connection, sometimes it dropped a lot of calls.

I doubt this will help, but you never know.

Tom