The Erlang B can be used to calculate number of lines,
given an offered traffic and GoS.
Can Erlang B be used for the case with e.g. two
services with different mean holding times?
Service A = 10 Erlangs offered
Service B = 2 Erlangs offered.
For example, the number of lines is given
from Erlang B table with 12 (10+2) Erlang offered and
Or using Erlang B for each service separately,
lines = ErlB(10,Gos)+ErlB(2,Gos)?