How to trace Dropped calls in CUCM ?

[AhmedHamad77]

Is there any way to trace Dropped calls in CUCM ?

Thanks

[Manish Gogna]

You will either need to run cdr reports or capture the detailed callmanager service traces to find the reason codes for call disconnect. HTH Manish

[AhmedHamad77]

How , I tried for that,, can you guide me 

[Manish Gogna]

For cdr you may pull the cdr reports by extension and check the Termination cause code as per the following table

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/service/8_6_1/cdrdef/cdradmin/cdrcodes.html#wp1062368

I cannot get into explaining the traces as it is a vast subject. Traces can be SCCP , SIP , MGCP or H323 based and all of them would have diff signaling and complexity based on call flow. You can search online for sample trace scenarios and testin your lab setup to make it easy to understand. You can start by first checking the following link on how to gather traces

https://supportforums.cisco.com/document/126666/collecting-cucm-traces-cucm-862-tac-sr

HTH

Manish