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The ASB 501 04 is designed for a traffic capacity of 0.2 erlang/extension.
BHCC Busy Hour Call Completion
The number of completed calls in an uninterrupted period of one hour during which the average intensity of traffic is at its maximum.
BHCC, for the individual LIM = 1.8 calls/second.
BHCA Busy Hour Call Attempts
The number of attempted calls in an uninterrupted period of one hour during which the average intensity of traffic is at its maximum.
The BHCA value is 10 times the BHCC value.