Hi KM,
The required config info related to each method is described in the following;
Monitoring Call Activity
NMS systems can retrieve CDRs and call history information in any of the following ways:
Cisco Unified CME GUI
Syslog or RADIUS servers
SNMP CISCO-DIAL-CONTROL-MIB and CISCO-VOICE-DIAL-CONTROL-MIB
Voice performance statistics from Cisco Unified CME
This doc describes how you can monitor call activities, CDR logs, billing records, and voice performance statistics in more detail.
http://www.cisco.com/en/US/customer/products/sw/voicesw/ps4625/products_implementation_design_guide_chapter09186a00805f07a6.html#wp1076106
Hope this helps!
Rob