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# Arrival Time Distributions

• This topic has 0 replies, 1 voice, and was last updated 16 years, 7 months ago by Alex.
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Posts Alex
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Hi all,

I think his has to do with arrival time distributions, but correct me if I am wrong. Here’s the question:

5 erlangs are offered to 15 circuits for half an hour followed by 15 erlangs in the next half hour. Using the Erlang-B formula (and thereby assuming equilibrium conditions in each half hour slot) calculate the blocking probabilities in each half hour. Assume that the mean call holding time is 3 minutes. Use these values to estimate the probability that a randomly chosen call in the 1 hour period is blocked and compare this with the blocking when 10 erlangs is offered to 15 circuits.

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