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12.14 A PBX provides queuing and automatic call back for access to outgoing WATS lines. If there are 20 requests per hour for the WATS lines, and if the average call is 3 min in length, how many WATS lines are needed to provide delays of less than 1 hr for 90% of the requests?

12.14 A PBX provides queuing and automatic call back for access to outgoing WATS lines. If there are 20 requests per hour for the WATS lines, and if the average call is 3 min in length, how many WATS lines are needed to provide delays of less than 1 hr for 90% of the requests?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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12.14 A PBX provides queuing and automatic call back for access to outgoing WATS lines. If there are 20 requests per hour for the WATS lines, and if the average call is 3 min in length, how many WATS lines are needed to provide delays of less than 1 hr for 90% of the requests?
Transcribed Image Text:12.14 A PBX provides queuing and automatic call back for access to outgoing WATS lines. If there are 20 requests per hour for the WATS lines, and if the average call is 3 min in length, how many WATS lines are needed to provide delays of less than 1 hr for 90% of the requests?
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