no, it's not as simple, you need to order the softokens which contain the encyption keys in order to use this, then go thru the CAPF configuration for all servers with the certificates, if you want also for MGCP exchange certificates, etc
also signaling is encrypted between CUCM and phones, RTP between endpoints.
Security Overview
http://www.cisco.com/en/US/docs/voice_ip_comm/cucmbe/security/6_1_1/secuview.html
Once you've gone thru the whole certificate and CAPF process... then it's as simple as changing that parameter
HTH
java
if this helps, please rate
HTH
java
if this helps, please rate