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Noisy lines tru a PRI

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telepath

IS-IT--Management
Mar 26, 2003
86
MX
I have an oooold Op11 in tandem with a CS1kM 5.5 tru a PRI link (no carrier it's in campus) A few days ago exactly every other call from any set (digital & analog) it connects with only noise (voice unintelligible very low in the background). LCNT= zero errors on either side.
I tried taking the link down and then up (including the clock), didn´t solved the problem.

I rather not reboot the Op11 if I can help it.

Any ideas?
 
What makes you think the trouble is in the Opt. 11 and not the other switch?
 
thanks for Your input:
KCFLHRC: At the CS1K the link is in a Dual PRI and the other link is working fine. What's the history LD? plz
Anders I think grounding is ok, but I'll check it anyway.
This happened a few Years ago but was corrected resetting the link, but this time that didn´t work.

Thanks.
 
Just because one link on a dual pri is working doesn't mean the other is fine. Test Equipment will help isolate the issue. Typically noise on a PRI is clocking, slips, etc. Have you made sure in the Opt. 11 that the clocking is tracking properly?

LD 60

SSCK 0

 
Yes I checked that, LCNT has no errors on both sides
.SSCK 0
ENBL
CLOCK ACTIVE
SYSTEM CLOCK - LOCKED TO SLOT 9
PREF - 9
SREF - FREE RUN
AUTO SWREF CLK - ENBL
NO ERROR

I tried to let it to Free run for a while , still same problem.
 
I would disable everything on the OPT. 11 side and reseat the card. Is this an NTAK09 or TMDI card?
 
telepath I would do what KCFLHRC suggest, if that doesn't work, I would roll the the PRI or if you have access to the CSU maybe roll that.
 
Solved.
It was a little less radical than littlemaster's suggestion. I restarted the PBX a couple of times, the second was the charm. I don't like to do that because some times they don't go back up at all, but this time worked fine.
Thanks to all for Your input.
 
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