File:Bell telephone magazine (1922) (14756710215).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

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rcuit arrangements inoffices, stores, and plants find lightsignals helpful, and with some theyare an essential part. Lamps, aloneor grouped, may use a bulb no largerthan a dime in diameter; bee-hivelamps, so called, are larger and morereadily visible; installation of proper relays makes possible the use of a bigand brilliant lamp corresponding togong or horn and useful in similarplaces. C(ODE-cALLiNG systems summon anindividual not at his regular telephonewhen there is a call or message forhim. Signals at suitable locationsmay be single-stroke bells, musicalnotes, horns, or flashing lights, andcustomarily the individual hearing orseeing his code responds to the P.B.X.attendant from the nearest telephone.One type, entirely separate from theregular telephone system, is, however,usually operated by the P.B.X. at-tendant, who pushes a button—one ofa number in a small cabinet—corre-sponding with the code signal of theindividual to be called. Another 258 Bell Telephone Quarterly OCTOBER
Text Appearing After Image:
COx^VERSATIOi\ BY LOUD SPEAKERThis group is listening to an incoming telephone call which is being amplified through the loud speaker on the table type, which may be installed in asso-ciation with dial P.B.X. systems, per-mits the direct dialing of a code sig-nal. The musical tone signals oftenheard in hospitals or departmentstores indicate a code-calling systemin operation. Paging by means ofloud speakers accomplishes a similarpurpose and is not, obviously, limitedto messages in code. Meeting Varied Needs i ERHAPS the one thing most con-spicuous in a general consideration ofswitching systems for business use isnot their number nor their variety,nor even the ingenuity of some oftheir arrangements: it is their abilityto provide service to meet almost anyimaginable communication need. Onebusiness may require a switchboardbig enough to serve a fair-sized city,miles of wire, hundreds of telephones.Another needs perhaps no more thana pair of telephones so interconnected that a call may be

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