MICS 7.1 losing programming

[kpzan]

Hello, got a customer with a MICS 7.1 with 6 pots lines and 12 T7316Es.

They had a storm around a month ago and when they came in to work the next day the phones were out of service. I responded and found the system working okay just no programming. I loaded a few programs then powered the system down for an hour and when I powered back up everything was still there so I went ahead and loaded the rest of the programming.

Everything's been fine for a month but they called this morning reporting the same trouble. I went back and loaded everything back in again but realize I've got to replace the software or cabinet or both to prevent this from happening again.

Any input on what to replace first?


Many thanks in advance, kp

 

[curlycord]

The capacitor on the motherboard can no longer hold the memory.

=----(((((((((()----=

http://www.curlycord.com

Toronto, Canada

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[phoneguy427]

I would replace the ram cartridge, make sure it is a release 2 or 3.

http://www.linkedin.com/in/Phoneguy427

 

[kpzan]

Thank you curlycord.

I can power the system down for an hour then power it back up and it holds the programming that I've done. Would that mean the capacitor is working?

Thanks also phoneguy. Does replacing the ram cartridge mean replacing the PCM card that goes in it too?

 

[phoneguy427]

No, you do not have to replace the pcm card, the pcm is the actual software, the ram cartridge has the caps in it to retain programming, a good ram will hold programming for weeks if not months.

http://www.linkedin.com/in/Phoneguy427

 

[kpzan]

What's odd is that the system will hold programming if I power it down. Even for an hour.

Wouldn't it lose programming immediately if the cap on the motherboard and/or ram cartridge were bad?

 

[phoneguy427]

There is a good chance you will be programming it again,hopefully the last time.

http://www.linkedin.com/in/Phoneguy427

 

[exsmogger]

The software cartridge only holds programming related to call routing if you're using a PRI. The main bulk of programming is held on the MICS motherboard. It's the 1.0F capacitor on the motherboard that is failing.

Older systems like the 616 and 824 held all programming in the software cartridge.

Brian Cox
Georgia Telephone

http://Georgia-Telephone.com

http://www.linkedin.com/in/briancox1952

https://brian-cox.square.site/

 

[kpzan]

Thanks exsmogger. And thanks everyone for your advice and input. Much appreciated.

 

[kpzan]

To follow up -

The old "damaged" system has been powered down and in storage for more than a week.

Out of curiosity I plugged it in this morning and found all the programming was still there.

How is it possible that the capacitor is bad if the system is still holding memory?