Which way is recommended to prevent these calls?

Your customer reports that they have had unwanted calls routing from their Cisco VCS Expressway to their ISDN gateway.

Which way is recommended to prevent these calls?
A . Configure a Registration Deny List on the Cisco VCS Expressway.
B . Configure a Registration Allow List on the Cisco VCS Expressway.
C . Implement a CPL on the Cisco VCS Control.
D . Implement a CPL on the Cisco VCS Expressway.

View Answer

Answer: D