I had a phone go dead today. Nothing showing on the display. I went to the phone room, removed the dead phone from the port/jack it was plugged into and plugged it into a different jack for a phone that we weren't currently using. The phone showed nothing and would not respond in the new jack. So I tried a second jack. Again nothing. Now here's the funny part - when I plugged the two phones back to their original jacks, neither of them would work now. Does anyone know what is causing this? If I reboot the phone system, will it bring the phone jacks back on line or do I have to buy two new expansion cards? I am completely clueless on this one. Any help would be appreciated.