Dead attendant console on old IMS system

[phadobas]

I'm helping someone who is overseeing an old NEC IMS. It is a redundant system, and yesterday, something caused it to switch the TDSW, NMC and CLK to the standby side. But there has already been something wrong with the standby side, so at this point the system stopped working. The person there switched back to the working side and the system came back up - sort of.
It consists of 3 stack, the phones only on the middle stack started working. The phones on the first stack had no dial tone, couldn't dial and couldn't receive calls. The phones on the 3rd stack were able to receive calls, but couldn't originate (pressing buttons didn't break the dial tone).

Turned out, there was an SW05 card in the first stack that was showing an alarm. We had a few of these cards in the system in standby mode, so used one of those and eventually found an SW05 card that needed to be replaced. From what I understand, it wasn't the one that showed an alarm.

In any case, through some heroic troubleshooting process, all 3 stacks were brought back on line.

What we have left is an attendant console that doesn't work. It has a card in the pbx that's controlling it, we reset that card but didn't fix the problem.

Is there anybody around here who remembers this system and has some idea what to look at?

 

[OzzieGeorge]

Ok vague memories! I'm assuming it is a HA630Z console and they were very prone to blowing the card if not brought on line in the correct way. I can't remember if there were fuses on the card but that would be the first thing I would be checking. Make sure you busy out the card before removing/inserting.

 

[phadobas]

It's an SN619 ATTC-A console, if that means anything.

 

[3racefan3]

In addition to the CS02 , I think that is what the card was in the IMS, there is also a small card attached to the back plane of the PIM that the console cable is connected to as well. Ozzie is correct that if you disconnect and connect the 25 pair cable to the console without removing the circuit card you will fry the console. Good luck it has been at about 20 years since I seen one of those consoles in service.

 

[bengi1234]

Additional data on the original post from phadobas:

The console card is a CS07-B. Have tried three cards -- the original one, a spare and also found one with a vendor. Each card does the same thing--even with no console connected. Within one minute it gives a C level Infinite Loop error, which it repeats every minute for about 5-10 minutes and then goes into a permanent make-busy state. I still have an erroring SW05 card on my standby route--haven't found a replacement yet. Maybe that SW05 could be affecting this?