PRI intermittently goes OOS/FE-idle & out-of-service-NE

[bhumphrey]

We put in a PRI configured as NI2 and intermittenly it will go out of service for a few seconds and then come back. I suspect it is the carrier AT&T but they have done a stress test and say it is our equipment. We have another PRI configured for LD and it is working fine and this is programmed the same. I have it configured b protocol on the DS1 baord but the Trunk group and signalling group is using protocol a. It will not let me use b since basic QSIG is not activated in the customer options page. Could this be the problem even though the other PRI is configured the same with no isue. I am also getting errors when I do a list measurements DS1 log.

Sometimes it will go for 2 days without an issue. I also did a status trunk when it was happening and got a OOS/FE-idle which is the carrier which causes our port to go out-of-service-NE

Member Port Service State Mtce Connected Ports

09/15 01B1615 in-service/idle no
09/16 01B1616 in-service/idle no
09/17 01B1617 in-service/idle no
09/18 01B1618 in-service/idle no
09/19 01B1619 in-service/idle no
09/20 01B1620 OOS/FE-idle no
09/21 01B1621 out-of-service-NE no
09/22 01B1622 out-of-service-NE no
09/23 01B1623 out-of-service-NE no

 

[4merAvaya]

On the DS-1 board protocol 'a' is typically used for AT&T Custom (4ESS) and protocol 'b' is used for NI2 (5ESS). On the trunk group form leave it set to 'a'.

When you lose the circuit, try testing the board (test board [slot]) to see if it's a transport or protocol issue.

Kevin

 

[dignoffo]

bhumphrey,

Also check that you have no wiring issues on your transmit & receive pairs if the PRI is provisioned on copper wire.

 

[inerguard]

On the DS1 screen try changing the CRC status from n to Y.

This solved a lot of my problems on a recent install.

If you are getting errors on the measurment screen, look for interference coming from electrical cables.

I had a site with similar problems, and they were caused by the 32Amp power cable running along the same route as the RJ45 cable into the DS1 board. Replace the RJ45 UTP with shielded STP cables and the errors will be dramatically reduced.


[Started on Version 3 software 15 years a go]

 

[bhumphrey]

We replaced the cable and the DS1 card and were still haveing issues. After 3 attempts reporting the problem with AT&T they finally replaced a card in thier network and resolved the problem.

Thanks for your assistance.