Each SMDR record can include values for ringing time, connected time, held time and parked time. The total duration of an SMDR record is the sum of those values.
The time when a call is not in one of the states above, is not included in the SMDR record.
All times are rounded up to the nearest second.
Where announcements are being used, the connected time for a call begins either when the call is answered or the first announcement begins.
Each SMDR record has a Call Start Time taken from the system time. For calls being transferred or subject to call splitting, each of the multiple SMDR records for the call has the same Call Start time as the original call.
The UTC Time shown at the end of the record is the time at which the SMDR record was generated.
