Important information about Telecommunications

Need help with the problem. Would you be able to show me how to solve this?

Consider a simple telephone network consisting of two end offices and one intermediate switch with a 1-MHz full-duplex trunk between each end office and the intermediate switch. The average telephone is used to make four phone calls per 8-hour workday, with a mean call duration of six minutes. Ten percent of the calls are long distance. What is the maximum number of telephones an end office can support?

Solution Summary

This posting contains answers to the given questions.