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    A telephone switching board can handle 120 phones. Assuming the following, and determine the outgoing traffic intensity and the number of channels.

    * On average 5 calls/hour per phone
    * 60% of all calls made are external
    * Average call duration time is 4 minutes
    * GoS = 0.9%

    © BrainMass Inc. brainmass.com October 10, 2019, 1:18 am ad1c9bdddf
    https://brainmass.com/engineering/electrical-engineering/outgoing-traffic-intensity-number-channels-329309

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    The average number of calls for 120 phones is equal to:
    u = ...

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