oldestgeek, I had the same thing happen with a printer that happened to be on the same circuit as the CICS. It was on the outside wall of the phone room. Everytime that someone would use the printer the phone system would reset. This was a small site and did not use printer alot so it took about 4 or 5 weeks to find out what was causing this. We replaced cab & software, luckily one day while adding a phone I was about 15 feet away from the printer testing the phone and guess what someone had to print something...electrician came and rewired, now 4 years later system is still running strong.