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Yes, you should be able to view service and enterprise parameters on CUCM 6.0. I'd suspect that you are hitting into CSCsh62086 which is resolved in the latest ES. Please open a TAC case to get the latest ES
1. You cannot restore your CM using SQL backup only. You would BARS backup to restore the system once CM has been re-installed on the box. Since the backup contains failes, database backup and registry backup as well, only using SQL would not work.2....
Yes, you can have to CallHandler for 2 different numbers. There is one more thing you can try. Instead of using a CTI Route Point, create a Translation Pattern where the Called Number is changed to Unity Pilot Point Number and the calling number is 1...