difference between QM and asterisk data

[michael4910]

I'm completely new to Queuemetrics and Asterisk, but I found that the data provided by asterisk differs from the data that queuemetrics gives. The number of incoming calls in asterisk is always higher than the number of calls in queuemetrics.

What can be the reason for this?

[QueueMetrics]

It really depends on your usage scenario - as QM measures queue activity, all calls that are received but (say) hang up during your ivr phase or during the welcome greeting will not be counted in QM. 
I am not sure how you are counting calls in Asterisk - you'll have internal calls as well, general PBX traffic, etc. Thi sis not generally tracked by QM.