10. A common-control device in a telephone exchange is required to commence operation within an average period of 10 milliseconds after receiving a calling signal. (a) If the device is held, on average for 50 milliseconds per call, how many calls can it handle per hour? (b) If the device is required to handle 18 000 calls per hour, what is the maximum permissible average holding time?

10. A common-control device in a telephone exchange is required to commence operation within an average period of 10 milliseconds after receiving a calling signal. (a) If the device is held, on average for 50 milliseconds per call, how many calls can it handle per hour? (b) If the device is required to handle 18 000 calls per hour, what is the maximum permissible average holding time?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 24RQ

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