Also, it’s diffused best practice to consider the peak hour traffic to size any telecom system.
Therefore, sample of the quantity of calls should be considered in their BH (Busy Hours)occurrence.
Normally, telecom operators do disclose some information about their traffic, like the total monthly traffic in minutes, in “per subscriber” rate or such.
This _can_ be valuable starting point to populate _any_ model.
Again: every model should show the sizing, behavior, performace of a system under stress, assuming that this is the most delicate criterion to watch.