I wasn't sure if I should have started a separate thread for this. I've moved all my connections from my G650's to replacement G450 Gateways and will be shutting down and removing the PN. When attempting to remove a DS1 from CM it flagged an error that it was being used as a syncronization source. I know how to remove these, but do I now need to create sync sources to the Media-Gateway where the E1's were moved into? I read about Sync over IP, but wasn't sure if that part applied to me. I'm still using digital E1's that are present in both my replacement G450's.