Chat duration

When chat is closed we calculate chat duration. Chat duration is calculated using these two options

How long operator can wait for message from visitor before time between messages are ignored. Values in minutes.

and

How long visitor can wait for message from operator before time between messages are ignored. Values in minutes.

(Code location)[https://github.com/LiveHelperChat/livehelperchat/blob/master/lhc_web/lib/core/lhchat/lhchat.php#L2032]

These two options can be found at

System configuration -> Live help configuration -> Chat configuration -> Misc