File:Bell telephone magazine (1922) (14756711185).jpg

Identifier: belltelephonemag19amerrich (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:
Flexibility Such buttons operate the several features of atelephone layout: in this instance they permitthe holding of a call on one line while talkingover another line through the same instrument to answer them. Up to forty lines canbe so concentrated, and the cabinetsare fitted with lights to signal incom-ing calls and lines in use, and withkeys for answering and holding calls.A typical use would be in an officewhich is the headquarters for sales-men who are out much of the time.An incoming call to any one of theirtelephones will be signaled at thecabinet, and a secretary can answerand, if necessary, hold the call whileshe obtains information over anotherof the lines multipled through thecabinet. Where two persons facingeach other across a desk are to use a 260 Bell Telephone Quarterly OCTOBER
Text Appearing After Image:
AT ONES FINGER TIPS The buttons which control the various operations of a telephone layout are incorporated in the base of this instrument cabinet, it may be had with facilitiesto permit both to use it at the sametime. If communication is the blood streamof business, then the private branchexchange switchboard is the heart ofevery sizable organization, for throughit circulate its telephone calls: incom-ing, outgoing, and among its members.While the arrangements heretoforedescribed have performed varyingservices, as dictated by the needs theymet, the P.B.X., whether manual ordial, has one principal function: toswitch calls. Smallest and simplest of the man-ual P.B.X.s are the key switch-boards, small cabinets which may beplaced on desk or table. The two sizes have provision for, respectively,three central-office lines and seven ex-tensions, and five central-office linesand twelve extensions. Calls are an-swered at a telephone wired into thecircuits, and switching is by themanipulation

Note About Images