A central-office-to-PBX trunk group contains four circuits. If the average call duration is 3 min and the busy-hour offered traffic intensity is 2 erlangs, deter- mine each of the following: (a) Busy-hour calling rate (b) Probability that two arrivals occur less than 1 sec apart (c) Blocking probability assuming a lost calls cleared operation (d) Amount of lost traffic (e) Proportion of time the fourth circuit is in use (assuming fixed-order selec- tion)

A central-office-to-PBX trunk group contains four circuits. If the average call duration is 3 min and the busy-hour offered traffic intensity is 2 erlangs, deter- mine each of the following: (a) Busy-hour calling rate (b) Probability that two arrivals occur less than 1 sec apart (c) Blocking probability assuming a lost calls cleared operation (d) Amount of lost traffic (e) Proportion of time the fourth circuit is in use (assuming fixed-order selec- tion)

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter8: Symmetrical Components

Section: Chapter Questions

Problem 8.23MCQ

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