Erlang is used as a unit to measure the traffic load. Its main applications are to dimension a call center, and to dimension a
telecommunication network such as a GSM or UMTS network, whatever it is, circuit switched or packet switched.
In its basic definition, the traffic load in Erlang is the total amount of resources used over a period of time. In a telecommunication
network, 1 Erlang actually represents the occupation of one resource (one radio traffic channel in the case of a radio network) during one
If applied in a simple mathematical formula, it becomes :
Traffic load(Erl)=Resources occupied X Time(h).
as one Ater= 120 traffic channel so u have to map e1 for 100Erl on basis traffic load.