Hi Karthik,
What version of CUCM are you running? You can use CAR to configure a Traffic System Report, check out the following link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/service/7_1_2/car/carsytra.html
The report provides information about the call volume for a period that you specify. It includes only those call types and QoS voice-quality categories that you chose.
Tip When you configure CAR to generate a traffic summary report, you can choose different call types (On Net, Internal, Local, Long Distance, and so on). CAR compares the traffic volume for every hour interval and identifies the hour with the highest traffic volume (the Busy Hour Call Completion [BHCC] number). To obtain the overall BHCC number, choose all call types when you configure CAR. Under the report title, a separate line displays the BHCC number for that day.
HTH,
Chris
