File:Bell telephone magazine (1922) (14756594415).jpg

Identifier: belltelephonemag22amerrich (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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i-mately in the middle of the cabinet.The cabinets are made 7, 3-6, and2-4 high to line up in rows 7 high.The largest cabinet fully equippedweighs about 600 pounds. Therewould be no trouble at all findingspace for a few such cabinets some-where in Berlin or in the ImperialPalace in Tokyo. Field Trial Bell System practice is to subject anew development to a thorough fieldtrial before introducing it into theplant. Such a trial under expectedoperating conditions usually disclosesany undesirable features and some- 1943-44 Packaged Carrier* for the Signal Corps 243 times indicates certain changes in thedesign. In the case of these packagesystems for the Signal Corps, therewere obvious difficulties in attemptingto conduct such a trial in an actualtheater of war. But, despite the fact considerable time might elapse beforecomments concerning operation wouldget back to the Laboratories fromArmy people using the systems in dis-tant countries. Accordingly, a fieldtrial was made in the Long Lines
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Packaged Type C terminal and associated line and power bay. Together. they provide three additional telephone circuits on a pair of wires which could otherwise furnish only one thaturgent need required that the firstfew systems be shipped to war zonesas soon as they could be produced, itdid not seem wise to forego a trialentirely. The equipment might besent to any part of the world and a plant under more or less simulatedwar conditions. For instance, a linewas purposely chosen which had notpreviously been arranged in all sec-tions for three-channel carrier opera-tion. The equipment was installed 244 Bell Telephone Magazine and put into operation by SignalCorps personnel and subjected to ex-pected operating conditions by usingit in connection with various assignedwar problems. The trial includedtests and observations by Bell Systemengineers but an effort was made toapproach as closely as practicablesome of the conditions that may beencountered in actual use for militarypurposes. The ex

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