is a specialized kind of calculator for computing the dimension and necessities of a phone call-center. It offers 3 different calculators that are available through 3 distinct tabs. There is the Erlang B, the Extended Erlang B and the Erlang C. Erlang Calculator
is for calculating and estimating the number of lines required for PSTN and private wire connections, to estimate the bandwidth required and many other calculations. It is mostly used by telephone system designers to compute various numbers necessary to put the system together.