Help in determining the type of distribution

[mehdialisoltani]

I have a queue of request that every during a day some requests arrive in a queue to be served. but, the rate of request's arrival is different in each hour.
I would appreciate that if somebody tells me what kind of distribution the problem is ?

 

[tkhunny]

Re: help in determine what kind of Distribution is that

Why is it not still a Poisson Process?