`gos`

Grade of service. Returns the grade of service (blocking probability) when traffic is offered to a number of circuits, you can use the Erlang B or Erlang C algorithm.

gos(number_of_circuits, traffic_offered, "B")

gos(number_of_circuits, traffic_offered, "C")

Table 1. `gos` Function examples
Expression	Result
`gos( 10, 4.3, "B" )`	Returns the grade of service for 4.3 Erlangs if offered to 10 circuits, = 0.00811999517242912.
`gos({Neutral.TCH.defined_ch} , {Neutral.TCH.offered_b } , "B" )`	Returns the grade of service for the available circuits and offered traffic.