File:Bell telephone magazine (1922) (14570060119).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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are two typesof loud speakers which will amplifyincoming messages so that they maybe heard satisfactorily by groups ofup to 100 and 250 respectively. Theloud speaker can be switched off andthe telephone at the same locationswitched on, so that two-way conver-sation between the near and distantpoints may be held, and the circuitcan even be arranged so that bothsides of the conversation are audiblethrough the loud speaker. The ad-vantages of loud-speaker hook-up foraddressing sales meetings, confer-ences, etc., over either local or long-distance circuits are obvious. All the types of signals previouslydescribed for residence use have theirapplication to business, and there areothers too. Bells and gongs up to 10inches in diameter can be furnished ineither indoor or outdoor style, for usein noisy locations or where they mustbe heard at a distance, and there is adouble-ended klaxon-like horn whichrivals John Peels view halloo as likelyto waken the dead. i9U0 At the Customers Service 257
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FOR THOSE WITH IMPAIRED HEARING The volume of amplification of the voice in the receiver is controlled atjhe small device at the side of the desk Lamp signals are much more usedin business establishments than inhomes. The man whose incomingcalls reach him through a P.B.X.switchboard may prefer to have themannounced by the lighting of a lamprather than the ringing of a bell, par-ticularly if his secretary has an audi-ble signal at the extension on whichshe picks up his calls. If more thanone line terminates at his telephone,lamps will indicate which line has acall for him or which line is already inuse. Many circuit 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 similar

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