atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems IP500 dig cards blowing

HI
I have a big problem with an IP Office 500.
On two occasions I have turned up onsite for the fault of both 8DS cards suffering complete failure. This was following power outages. All other cards including the PRI cardsd sitting on top of an 8DS unit are OK. On my second visit I installed a new UPS but it has now happened again! Both 8DS cards blown again!
I am thinking something may be wrong with the Avaya chassis or the power unit?
Or maybe it is just the building's unstable electric supply to blame?
Customer trying to say it MUST be the system so we have to pay for all the visits and faulty kit.
I am about to change the whole unit and see what will happen next.
After that I have to hope the cards blow up again!
Any ideas? Is there any known history of the 8 dig cards being problematic or whether the chassis or Avaya PSU could be causing the problem?
Thanks
Mike

to me if its protected with a good ups i would probably looking a hardware issue

Change the unit and cards. Just the bad cards.

Are there any analog pots daughter cards on the DS cards in question?

Hi Nebraska( great movie) thanks for answering... yes the pot ports work ok as well as the PRI daughter board.

I would put some protection on the incoming POTS lines. Possible that something is coming thru them and zapping your base cards.

First off I am NOT an Avaya guy, but are any of the digital stations off premise? Sounds to me like the surge is coming into the dig ports. I have seen this on an IPO that had several buildings connected with cable with no bonding. Kept blowing the station ports until they finally protected them.