The Information Technologies policy of your company mandates logging of all unsuccessful calls that
resulted in reorder tone in Call Detail Records. Which option is the minimum Cisco Unified CM
Service Parameter configuration that is needed to ensure compliance to this policy?
A.
Set CDR Enabled Flag to True.
B.
Set CDR Enabled Flag and CDR Log Calls with Zero Duration Flag to True.
C.
Set CDR Enabled Flag to True and set Call Diagnostics Enabled to Enable Only When CDR Enabled
Flag is True.
D.
Set CDR Enabled Flag to True and set Call Diagnostics Enabled to Enable Regardless of CDR
Enabled Flag.
E.
Leave CDR Enabled Flag and Call Diagnostics Enabled to their default settings.
Correct answer is option B
https://supportforums.cisco.com/document/53056/understanding-cdr-call-detail-records#Logging_Calls_With_Zero_Duration
Logging Calls With Zero Duration
A CallManager service parameter called ‘CDR Log Calls with Zero Duration Flag’ determines whether CDRs for calls that were never connected or were connected for less than a second are generated. Examples:
•When a user goes off-hook and then on-hook without completing a call.
•When a user completes a blind transfer (the consultation call does not connect).
•MWI On/Off calls.
Note:
The CDR Log Calls with Zero Duration Flag service parameter is valid only when the CDR Enabled Flag service parameter is set to True. If CDR generation is disabled, the setting of the CDR Log Calls with Zero Duration Flag service parameter has no significance.
CallManager always generates CDR data for calls that have a duration of 0 seconds and terminate because of an error condition of some sort, regardless of the setting of the CDR Log Calls with Zero Duration Flag service parameter. Calls to busy destinations or bad phone numbers are examples of this type of call. The duration of these calls is 0 because they were never connected, but their CDRs are generated anyway.
CallManager does not generate CDRs for calls that terminate normally and have a duration of 0 seconds, unless the CDR Log Calls with Zero Duration Flag service parameter is set to True. When CDR generation is enabled, CallManager generates a CDR for each call that was connected for 1 second or more