Personally, I’m not sure about the Binomial dist etc but we use an hourly call monitoring package from Sension called MIS, and this gives a call distrib per hour. Depending on what day it is, and what market you’re in (we’re in retail and we get called by travel agents dealing with the public)things can vary greatly esp around the beginning, lunchtime and end of the day. If you need a hourly % Distribution let me know.