File:Bell telephone magazine (1922) (14776262803).jpg

Identifier: belltelephonemag13amerrich (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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Text Appearing Before Image:
« * u u BELL TELEPHONE QUARTERLY gauge pairs specially located in the cables which were reservedfor use in providing radio network facilities. In addition to providing these special conductors, it isnecessary to provide special forms of amplifying equipment orrepeaters, capable of taking care of the wide range of fre-quencies to be transmitted. Various other forms of supple-mental apparatus, including special loading coils, are alsorequired. Whenever a circuit is removed from regular message serviceand transformed into a program circuit, the change involves theloss, not only of the two physical wires which make up thecircuit, but of other circuits which might otherwise be operatedsimultaneously with the regular telephone circuit on this samepair of wires. Thus, on open wires, a change from message toprogram service means giving up the use of the same conductorsfor telegraph messages which would ordinarily be transmittedsimultaneously with the telephone messages and often the sur-
Text Appearing After Image:
JTOCKTON \ - LEGEND AND 0 C€~ERAL C SUMMARY OF FACILITIES - ONS rco moM TEL£P«ow£ ornc£S C 1 Bell System Hook-up Facilities Provided for Don Lee in the Spring of 1934. 92

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