# SMDR Timing Functions

The timing functions that apply to incoming and outgoing calls are as follows:

Incoming Call. Three aspects, related to the timing of an incoming call are recorded on an SMDR call record: the date, the time taken for the called party to answer and the duration of the call. The time to answer is the difference between the time when the called device is seized and the time when the called party answers. The duration of the call is the difference between the time when the call is answered and the time when the call is released, such as call cleardown.

Outgoing Call. Three aspects related to the timing of an outgoing call are recorded on an SMDR call record: the date, the call start time and the call duration. The latter is only recorded for calls which are answered. In the case of unanswered calls, the call start time is recorded as the time when the called device is seized. In the case of answered calls, the call start time is recorded as the time when the called device is answered. Call answer is determined by the detection of speech or by the detection of an answer supervision signal provided by the trunk. "Fake Answer Supervision After Outpulsing" can be programmed, which causes the system to recognize answer status immediately after digits are outpulsed, regardless of far-end conditions. The call duration is the difference between the time when the call is answered and the time when the call is released.