A user came to me today indicating his phone (2616) was acting strange. I checked the settings on our 11c running 25.40b and every key on his TN was set to MCN 26 0. Rather bizarre. I went to out the TN before doing a CPY to restore it. As soon as I did it the switch rebooted. After it came back his TN had the proper settings. A little later another users Key 0 was not functioning despite the fact that it looked like it was defined appropriately. He could dial from it and his DN showed up on the display of the person he called, but they could not call him-just silence. I went to change his DN and again the switch rebooted. So obviously something is corrupt. Would someone let me know what is the best strategy for resolving this this because I have no doubt it will happen again soon?