Traffic refers to the usage of CHANNELS and is usually thought of as the holding time per time unit (or the number of “call hours” per hour) for one or several CIRCUITS (trunks or channels). Traffic is measured in Erlangs (E), for example, if one subscriber is continuously on the telephone, this WOULD generate one call hour per hour or 1 E of traffic. The traffic one cell can carry depends on the number of traffic channels available and the amount of congestion that is acceptable (to both the CUSTOMER and the provider), the so-called Grade of Service (GOS).

Traffic refers to the usage of channels and is usually thought of as the holding time per time unit (or the number of “call hours” per hour) for one or several circuits (trunks or channels). Traffic is measured in Erlangs (E), for example, if one subscriber is continuously on the telephone, this would generate one call hour per hour or 1 E of traffic. The traffic one cell can carry depends on the number of traffic channels available and the amount of congestion that is acceptable (to both the customer and the provider), the so-called Grade of Service (GoS).