Random Nature of Service Demands

  • Sushil G. Munshi
Part of the Applications of Communications Theory book series (ACTH)


In the course of conducting our normal daily business, we encounter situations where our demands are not immediately satisfied, for example, at taxi stands, banks, post offices. Some of these situations are tolerable, others are frustrating but beyond our control. The degree of importance of the service sought influences the choice between abandoning the service demand or increasing our threshold of tolerance and waiting until the demand is satisfied. In this chapter we will describe the nature of one such service demand, telephone calls, and characterize this demand in mathematical terms. The chapter is intended to provide an introduction to congestion problems and how they influence the design and engineering of digital switching systems. No attempt is made to derive the theory or offer solutions for specific congestion problems. The interested reader should consult the references listed at the end of the chapter for further study.


Service Time Traffic Load Line Module Busy Period Service Demand 
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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Sushil G. Munshi
    • 1
  1. 1.Technology Planning DepartmentUnited Telecommunications Inc.Kansas CityUSA

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