I'm planning to test my CallManager install. But first, I plan to backup the IOS configuration on the our production router. Then do a no telephony-service command to remove CME from the router. Input the MGCP commands and test away. My question is, will I be able to restore my saved IOS configuration so that CME is back to original state after testing? Also, is this the best way to remove CME for CM implimentation without messing everything up. Thank you for all your help.