How do I read the log file?

Hi all :smiley:

I’m trying to understand how many calls we receive every day. We have this log (taken from the “203” phone, the phone we use to answer calls)
Is it correct to make a filter on the G column “context” --> only “ext-group” and then a filter on the H column “duration” > 0.

Thanks in advance and sorry for this very newbie question :blush: