BCM 3.5/400 Chassis

[mkbloomfield]

Has anyone seen a problem on the BCM 3.5 platform (400 chassis) where the services go down intermittently?

Here are the symptoms: voice mail and Auto Attendant go down, telephony services stay up. All LEDs are solid. Customer can access the box through a web browser. A hard reboot solves the problem.

This does not appear to be the base function tray issue as that part has already been replaced by another vendor. Is it possible that the new motherboard (blue capacitors with a "K" stamped on top) is faulty as well?

No backup has ever been scheduled on this box so that's not the culprit.

This BCM has never been patched, so that's my next step. I also turned on the alarm service so that we can check the alarms the next time this happens.

Has anyone come across this before?

 

[biv343]

Has the MSC been checked/replaced as well? See if your MSC card has this part number:

NT5B15AAAJ A0982570 05 for the BCM400 Media Services Card FRU

Nortel bulliten 2005006051 explains this in full detail.

I would check the MSC before going too far. Patches would be a good idea, if you can find them for release 3.5, but I would make sure that the system is somewhat stable first before trying to patch/upgrade.


The symptoms associated with this MSC issue include:
>System Performance issues, including loss of all or some of NT functionality, which require
a reset to recover.
>Core resets, indicated by temporary (or permanent) loss of TDM/telephony services, which
can be self recovering.
>The symptoms mentioned are not typically seen with increasing frequency, they are
random and the system does not degrade over time. These issues are typically seen within 13 weeks of installation, and can be accompanied by alarm 50-1. Note this alarm can also be raised
when the system is reset or power cycled, so diagnosis should not be based on this alarm alone.
>The only visible indication that may be seen is Red LED's flashing on the front of the Base
Function tray.
>Remedial actions such as periodically rebooting the system or replacement of the
programmed hard drive and reprogramming will not permanently correct the MSC issue.
>Note that loss of access to telephony services from Unified Manager (UM) may NOT
necessarily mean a bad MSC or Motherboard. Resetting the BCM or simply restarting the Voice
Management Subsystem service is very successful in restoring this service. A possible software
solution is being investigated to address this issue.