Total Active Channels

I am new to FreePBX and I have a question about what I am seeing on the System Status page. In the Total Active Channels area I see that it often goes over my 12 purchased channels. In fact, if I hover over the graph it shows my totals channels as a percentage of a max of 54 channels. Are the channels counted here different from the purchased channels?

Connections to the individual phones are also active channels.

In that case, I would expect the maximum to be 12 plus 21 actual phones - which would be 33. Where does the number 54 come from?

Just messing with the numbers you provided, if two lines per phone, 21*2+12=54

but that is just a guess…

I also have to ask, what channels did you purchase? Are you talking about g.729 licenses?