Groups are created in 3CX under Users -> Groups. You can choose to view the report for the entire Group e.g. for the security center. Select the group you want to search for → set from and to date → now select the time interval you want to search for (choose between 15-, 30-, 60 min, or per day) → click on Search.
Scroll a little down to get an overview of the average waiting time, average talk time, number of answered calls, and average calls per day/hour.
Scroll a little further down the page and you will find a detailed report of the period. Click on a time period in the table to see more. Click on a specific call to see the call flow; In-depth information on the call, from start to finish.
Click on the headline to see more. From here, you can click on a specific call to see the call flow with in-depth information about the call, from start to finish.
At the bottom of the report, you will find the call graph. The graph is separated into the same time intervals, as you have chosen in your search. The graph gives you the same type of calls, as you have chosen in your search filters when searching. Additionally, it will also give you the total amount of waiting time for the time interval. The waiting time is shown in seconds.
Find more Reports info in the posts below