The measure of 3600 ‘call seconds’ (36 CCS). Stems from a unit of one-hour of measured telephone traffic conversations, faxing, internet connection, and the like. Equivalent erlang values are one single one-hour call, two 30-minute calls, or four 15minute calls. Agner Krarup Erlang (1878-1929), a Danish telephone engineer, invented the erlang as a pioneer of queuing-theory..
Black’s Law Online Dictionary
