File:Bell telephone magazine (1922) (14755976722).jpg

Identifier: belltelephonevol21mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
DIRECTSUBSCRIBERLINE FROMTOLL BOARD LOCALCONTROLCENTER Distribution of the WarningsIn this diagram, channels from a DistrictControl Center to the Control Centers ofseveral neighboring communities are repre-sented jointly develop the warning lists, giv-ing due consideration to the capacityof the telephone facilities for han-dling warning calls. Particularly dan-gerous at such a time are the so-calledchain calls of excessive length,whereby a small group is called fromthe Control Center and they in turncall a larger group, and so on. Toshow how such calls snowball, if anattempt were made to reach about1,000 people in 10 minutes, therewould be a wave of over 500 callsduring the last minute and over 120operators would be required in a 68 Bell Telephone Magazine JUNE
Text Appearing After Image:
Reporting an IncidentWardens are the sentinels of civilian defense manual central office to complete themwithin the deadline. Mustering the Organizationfor Duty jIjven though an efficient air-raidwarning system has been organized,experience on the Pacific Coast, whereactual warnings have been issued, in-dicates that the amount of advancewarning of potential attacks willvary considerably, particularly in thecoastal and border areas. While insome cases an emergency may be her-alded by a YELLOW warning from theInformation Center well in advance of any possible attack, in other casesthe first indication of danger may bea RED warning. In view of this, the following stepsare being taken by defense officialsof many communities to insure thatthe defense organization is availablefor duty as needed: First, organizations are being builtup of volunteers who are continuouslyavailable to assume civilian defenseresponsibilities. An example of goodavailability is a person who lives andworks in a comm

Note About Images