Core Telephony Slip Underflow Alarm

[jlk53]

I get this alarm all the time on a BCM. " Alarm ID 326 Core Telephony - "Slip Underflow"short term alarm threshold has been exceeded on the DTM. The module is in a no-new-calls state." I have checked everything I can think of but can not find anything wrong. BCM is 4.0. It just semed to start after I went from 3.7 to 4.0. I have 2 T1's not PRI's on BCM. It does not seem to affect any calls. Anyone have any ideas. Thanks

 

[cook1082]

Check the clocking.

 

[option11newby]

I also am receiving this alarm every one minute on a version 4 BCM.
We have a PRI, clocking primary external on BUS 07, a BRI on Bus 6 and a 8x16 Combi on Bus 4, along with a GATM8 on Bus 4.

There appears to be no disruption in service when these alarms occur but I am concerned about the frequency. Clocking has been checked.

Any other ideas on this one?


NCSS, NCDS, NCTS

 

[chiden]

As Cook 1082 Stated. Check Clocking on Card should be set for Primary External. More than likely you have it set for internal.

 

[option11newby]

Chiden,

In my post I stated the PRI was set for Primary External

NCSS, NCDS, NCTS

 

[Deweyhumbolt]

Better than 60/40 NRS issue. But, are packet sizes exact, is their a stutter or full ring on either end, or just a fast busy?