I had a tech come in and try to upgrade my MICS 4.1 to new 6.1 software. Prior to upgrade he backed up the config with a RAD to his laptop. When upgrading he had problems and had to downgrade back to 4.1. He did this by defaulting the system and then reloading the backup from his laptop via RAD. Now I can't get any Pri access to or from the outside world. System works fine internally dialing set to set,but no outsdie access. I asked on another board and 2 vendors told me that you can't backup keys over RAD and I'll need to get new keys generated. Also, the tech who did the work said that the sysID changed, which leads me to believe that the old keys wouldn't work anyway. Any help is appreciated.