Nortel Meridian 81c Challenge

[Chr1st1an]

Hello,

This weekend I experienced a challenge with my Nortel 81c switch. It seems that a circuit breaker tripped and caused the switch to loose complete power. I currently have a Helios 600/48 power solution with 2 rectifiers supplying power to the switch. At first I thought the challenge was one of the rectifiers that caused it, switch was powered back on and only one core came up, the other core would stay with all the lights lit and it appears to be trying to come up as it fluctuates from floppy drive to CD-Drive on a loop non-stop. I shut it down one more time and opted to go to By-pass mode on the Helios unit and both cores came up, but then after an hour or so the switch started loosing power again. I reverted back to using the normal mode of the power solution and the switch came up once again with only one core, the other one went back to trying to come up with all lights lit and going from foppy drive to cd-drive. Any idea how I can find out what is causing that one core not to come up? It looks like it's ok since it came up ok once before.

Thank You.

 

[StoneColdphoneman]

Get good electrician and have him check for any loose connection, as well as loose ground.

 

[tnphoneman]

You are going to need a vendor to come look at the systems and power plant. Where are you located and do you have a vendor already? I can see if I can find one for you if not.

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[johnpoole]

did both cores end up comming on line? it's not uncommon for them to take time to decide who is active and where rdun needs to some from..

if one of them is still off line.. plug into the j25/27 ports to view the msgs.. chances are that will tell where the failure is... i betting cmdu

john poole
bellsouth business
columbia,sc

 

[Chr1st1an]

I have an power technology company coming in to verify and see if the rectifiers are running correctly.

The strange thing is that both of the cores came up ok at one point. When the switch started going down due to power, both cores were running at that time. Then I gracefully shut it down and fired it back up and thats when one of the cores did not want to come up again. it just stays in a loop trying to boot up from the floppy and cd-drive.
I will try John's suggestion and at least try to find out what is happening with it.

 

[phonz1]

what is the output on the rectifiers? are they balanced?

 

[PhoneGuyy]

I would second what John is saying and that your CMDU just crashed...