The Director of information Security of your company wants to log all calls when a users phone speed dials to a busy PSTN destinations and hangs up in less than one second in Call Detail Records.
Which option is the minimum Cisco Unified CM Service Parameter configuration that is needed to ensure compliance to this policy?
The correct answer is C. Set CDR Log Calls with Zero Duration Flag to True.
Explanation: Call Detail Records (CDRs) contain information about call details such as the called and calling party numbers, call duration, call type, etc. CDRs are generated by Cisco Unified Communications Manager (CUCM) for each call that passes through it.
In this scenario, the Director of Information Security wants to log all calls where a user speed dials to a busy PSTN destination and hangs up in less than one second. This type of call is typically known as a "phantom call" and can be an indicator of toll fraud or other security breaches.
To meet this requirement, the minimum configuration that is needed is to set the CDR Log Calls with Zero Duration Flag to True. This parameter tells CUCM to generate CDRs even for calls with a zero duration, which would include phantom calls.
Option A, B, and D all enable CDR generation but do not specify that CDRs should be generated for zero-duration calls.
Option E sets both CDR Enabled Flag and CDR Log Calls with Zero Duration Flag to True, which is not the minimum configuration needed to meet the requirement.
Therefore, the correct option is C.