Thanks PBXMAN,
I first did a system initialize and that didn't fix it so I powered down cpu0 and everything started coming back on line.I didn't know about the register cards at the time until my vendor told me about it.
Like I said before it was strange,no errors,all lights were green on the system.Unfortunately we are a call center and roll lines back and forth between sites every couple of weeks.This has worked fine for the past 6 mos or so.
We are on release 18 so NEC recommended upgrading to the latest which they said is release 20.The local vendor said he had seen it but it should have rolled to the secondary register card and NEC said they had seen it on release 18.Our primary site which has been running for 10 years is on release 15 and they say they have never had a problem.
What release did you see this on?
Thanks for the info.