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