The Erlangs and IP Bandwidth Calculator calculates the bandwidth that should be provided through an IP-based network to transport a known traffic volume in Erlangs. Reverse calculations are also possible to calculate the busy hour traffic in Erlangs that can be offered to a group of lines derived from an IP link of a known bandwidth.
There are actually two steps in each calculation, although the calculator merges these steps. Firstly, the Erlang B traffic model is used to calculate the number of lines required for a given busy hour traffic figure. Then, this is converted to a bandwidth figure using an identical process to the Lines and IP Bandwidth Calculator.