2400 IMX R11 - PRI Clocking trouble

[grh959]

Hi all, Still running my NEC legacy system. One of my sites is having framing slips on its PRI (24PRTB-a). Telco swears it is a PBX issue and not their problem. It has been running great with no issues until two weeks back. I have checked jumper for clock and no changes have been made in system. I am seeing frame errors on the PRI:


DFTX 20/04/02 16:06
SYSTEM MESSAGE 3-I [SUP] DIGITAL LINE FAILURE
XXXXX XXXXXXX Mar 20 00:15
LP00-0-ACT
1:74 03 00 00 00 00 00 00 2:00 00 00 00 00 00 00 00 3:00 00 00 00 00 00 00 00 4:00 00 00 00 00 00 00 00
5:00 00 00 00 00 00 00 00 6:00 00 00 00 00 00 00 00 7:00 00 00 00 00 00 00 00 8:00 00 00 00 00 00 00 00
Module Group: 0
Unit: 3
Group: 20
Kind of Fault: Slip occurs 50 times a day
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(U : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(G : This data is valid when the kind of fault is 0FH.): 0
Location of faulty circuit card(MG : This data is valid when the kind of fault is 0FH.):

We have had a few complaints of busy signals when trying to dial out

Any Ideas?

 

[belevedere]

Probably telco. Do you have any redundancy? If so, switch time division. Also, if you have an adtran, check that out/reset it.

 

[grh959]

Yes we have fully redundant. Switched over TSW, no change. Will reset the Adtran Atlas 800 after looking back and seeing other DRU errors/failures/ warnings as well. Good call.

 

[CoralTech]

Something is set wrong. I have seen this where is kinda works but sure enough you look down the programming and someone set AMI/D4. I agree looks to be telco.