Hi There, I have a customer w/100 system R1, about once a week, system locks up. All sets show ver. on display. Customer has to power system off and on then all ok. I'm looking for maybe a known issue so I don't have to keep going back replacing parts. Thanks All!!!

We had a DCS (not the same system but exact same symptoms) locked up the same way and it was one of the line cards causing the problem. Do you have multiple line cards?

What about power?Is it stable,is there a UPS connected to the system?

My first thought pvj

Most likely a dodgy PSU.

Check the fuses on the power supply.

Exactly what I was thinking...

Thanks for the help.Since I then, I had another customer with same symptoms but would not reset. Had to replace psu (fuses were o.k.).

I think i'll replace psu on this one also.

Interesting. We've been having a run of failing PSU's as well. I wonder if there's an issue. Did anyone receive any notification from the manufacturer about this? It really weird but the fuses have been fine. HMMMmmmmmmmm...

No notification as far as I know.

I have a customer with the same sort of problem.
Sometimes it just locks up the ISDN and other times the whole system.
I will change the PSU and see if the probblems go away.

We have a large account that used to have similar problems. Turned out the system wasnt grounded properly. I suppose removing the bad ground would of fixed it as well.

See the post about OS100 Power Supply issues. All of my customers that had Power Supply failures started off by resetting the system power when the phones stated Rev. How old is the system?