Hello AH,
The cumulated time all ports are busy can give you the erlang…
For instance : 36,000 seconds of cumulated busy time for all the ports = 36,000 / 3,600 = 10 erlangs
Only divide your cumulated time in seconds by 3600 (if the measurements was performed on one hour)
Let me know if it’s helping,
Regards,
Pix