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12.8 Traffic measurements on a PBX-to-central-office trunk group indicate that dur- ing the busiest hour of the day the trunks are 80% utilized. If there are eight trunks in the group, what is the blocking probability, assuming blocked calls do not return? How many trunks must be added to achieve a maximum block- ing probability of 5%?

12.8 Traffic measurements on a PBX-to-central-office trunk group indicate that dur- ing the busiest hour of the day the trunks are 80% utilized. If there are eight trunks in the group, what is the blocking probability, assuming blocked calls do not return? How many trunks must be added to achieve a maximum block- ing probability of 5%?

EBK ELECTRICAL WIRING RESIDENTIAL
EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter12: Lighting Branch Circuit And Small-appliance Circuits For The Kitchen
Section: Chapter Questions
Problem 5R: a. What is the minimum number of 20-ampere small-appliance circuits required for a kitchen according...
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12.8 Traffic measurements on a PBX-to-central-office trunk group indicate that dur- ing the busiest hour of the day the trunks are 80% utilized. If there are eight trunks in the group, what is the blocking probability, assuming blocked calls do not return? How many trunks must be added to achieve a maximum block- ing probability of 5%?
Transcribed Image Text:12.8 Traffic measurements on a PBX-to-central-office trunk group indicate that dur- ing the busiest hour of the day the trunks are 80% utilized. If there are eight trunks in the group, what is the blocking probability, assuming blocked calls do not return? How many trunks must be added to achieve a maximum block- ing probability of 5%?
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