Monthly Archives: January 2015

Telephony terms explained: Erlang & Erlang B

Erlang (E), a unit used for telephony sizing, is named after the Danish mathematician and engineer A.K. Erlang. Erlang is the amount of traffic per hour (number of calls x average call duration). So if you would have 40 calls per hour with an average duration of 3 minutes, that would give you 40 x 3 = 120… Read More »