Calls nontaken

I need to know like counting the amount of calls nontaken care of by agents who are in a queue and which calls receive and they do not take care of them, the agents are dynamic.
Thank a lot.

a quick search of the wiki would have given you an answer. is probably the most popular.

I need to control the calls that are not taken care of by the dynamic agents, somebody has idea of as I can get to make this, manager generates the following thing :
Application: NoOP
AppDate: Return to dolocal dial with DIAL STATUS CONGESTION