[Serusers] acc_db_request milliseconds

Hello. Please teach me about acc_db_request for the call charge. For example, when call starts (ACK), my ser.cfg acc_db_request will executed to insert a new row for db. timestamp ------------------- 2007-08-24 23:50:00 And when call ends (BYE), acc_db_request executed. timestamp ------------------- 2007-08-24 23:50:03 These values were considered about milliseconds? For example... timestamp ------------------- 2007-08-24 23:50:00(.000) timestamp ------------------- 2007-08-24 23:50:03(.525) In this case, I think that the interval of these time becomes 4 seconds If I use these values for the call charge (round-up millisecond). Or, has the time recorded with BYE already been rounded up? Thanks, Sahria