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CUCM force encryption for all phone calls

TTrebing
Enthusiast
Enthusiast

Is there any way to enforce encryption on calls so that a call is not completed if it cannot be encrypted? 

For example, security mode on the cluster is "mixed".  Phone A is setup to support encryption, while phone B is not.  When phone A calls phone B, the call is not encrypted, but is successful.  Is there a way to make the call to phone B fail since phone B is not capable of encryption.  I believe based on my research that the answer is "no", but I need official confirmation from Cisco. 

Thanks!

3 Replies 3

Jaime Valencia
Hall of Fame Cisco Employee Hall of Fame Cisco Employee
Hall of Fame Cisco Employee

AFAIK you got this right, it's not possible to configure a cluster to prevent non-secure calls, there already some things that are non-secure, like MOH, if that was possible, you'd lose some features because of that.

HTH

java

if this helps, please rate

justin-puckett
Beginner
Beginner

In CUCM, under "System -> Service Parameters" (CUCM server and Cisco CallManager Service).  Under the Clusterwide Parameters (Feature - General) section, set "Block Unencrypted Calls" to "True"

Nice find Justin.

 

has it actually been proven working? and would it effect MOH like Jaime mentions?

 

+5!

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