Bell telephone magazine (1922) (14569515618)

Identifier: belltvol20elephonemag00amerrich (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

Text Appearing Before Image:

s each which are being plowedin simultaneously at the rate of sev-eral miles a day. Figure 5 shows sucha tractor train pulling in cable. Inorder for this installation, which is tointerconnect the east and west coastsby cable, to be completed at the earli-est possible moment as a part of ourdefense activities, plans have beenworked out so that the plowing-in canbe carried on 24 hours a day, if neces-sary and weather permitting. Thishas been accomplished by equipping 1 9 4 1 Trends in Toll Cable Usage 103 the tractor trains with lights to enablethem to operate at night almost aseasily as in the daytime. It is ex-pected that the transcontinental cablewill be completed before the end of1942, and will result in all cable cir-cuits from New York to San Fran- cisco and Los Angeles, for cables arealready available from New York toOmaha and from Sacramento to SanFrancisco and Los Angeles. The net result of the rapid expan-sion of the toll cable network is agreat addition to the security of the

Text Appearing After Image:

F^iG. 4. Lnterior of an Auxiliary Repeater Station Inside the building shown on the opposite page are compactly arranged the repeaters andassociated equipment for amplifying the voice channels transmitted by carrier current 104 Bell I i;m:phone .Maca/im: M A Y

bell telephone magazine 1941 book illustrations telephone bell telephone company american telephone and telegraph company history of technology high resolution images from internet archive

1922

Prelinger Library

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public domain