Hi Guys,
	I am new to opensips. I have configured it to do radius accounting. 
It sends Acct-Start only, it doesn't send Acct-Stop to freeradius.
	Also, Is there any document which explains flags value for modparam
	e.g	modparam("acc", "failed_transaction_flag", 4)
	Here I don't know whats the meaning of 1,2,3,4.. 
Thanks
Darshak