Nil,
From what I’ve read,Erlang is measure of ‘occupancy’ so
Erlang = usage / capacity
So if you measured X kbps on a sig link, which was on a timeslot of capacity 64kbps then
Erlang = X/64
you may also want to additionally factor in a QoS measurement, so would never run them at above 0.8 erlang = 80% of 64 =~51k