I need to trace incoming call recived by extension in my CM 6.1,
I'm able to do it using the Reports form or using Real time monitor?
You can use Real Time Monitor (RTMT) to collect the traces. First, you must ensure that you understand the trace levels. See the following URL:
The trace you are interested in is the Call Manager trace. The default trace level is Error which is useless unless you just want to see errors. I typically set my Call Manager trace level to Significant. I would not recommend using Detailed or Arbitrary unless you are setting it temporarily and/or under Cisco Tac recommendation.
There is a nifty feature called "troubleshooting trace settings" which you may want to read up on:
Once you setup a trace then you can collect it via RTMT. Got to System>Tools>Trace>Trace and Log Central. Look at File Collection or Remote Browse. Remote browse means you can browse the traces that are stored on the server. File Collection means you can download the files locally and figure things out. You can also use "Real Time Trace" but it is anything but real time.
Cisco UCM CDR will show a call record for the on-net call information. You would need to work with your telephony provider to trace it beyond the edge of your network. Note tha the Malicious Call ID feature may provide you some additional functionality depending on what is happening.