[asterisk-users] how to get Current Calls details

[Nikhil]

Hi everyone
   How can I get the current calls details in asterisk.if I use cli 
commad core show channels,there is two channels of each call.But the 
requirement is, need to get caller ,calee,starttime ,duration of the 
current calls.This value should be proper for call forward,call transfer 
,and scenarios.Please help me on this.

Thanks
Nikhil