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Hi,
I need formula from which I can calculate number of lines if I know blocking/loss probability and traffic load in erlang?
Thanks,
DamirHi Damir,
The following is the estimated Erlang B Formual :
E= 1/ ( 1 + N/A + N(N-1)/A^2 + N(N-1)(N-2)/A^3 +… + N!/A^2)
Where E = Probability of Loss, N = Number of Trunks, and A= Carried Traffic.
Unfortunately, to calculate the number of lines, you will have to use the formula as is, and estimate the number of lines until E approximates your Loss Probability.
Sorry, error in Formula… the correct polynomial is :
E= 1/ ( 1 + N/A + N(N-1)/A^2 + N(N-1)(N-2)/A^3 +… + N!/A^N)
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