American telephone practice (1905) (14569581490)

Identifier: americantelepho00mill (find matches)

Title: American telephone practice

Year: 1905 (1900s)

Authors: Miller, Kempster B. (from old catalog)

Subjects:

Publisher:

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

veral sec-tions. When a call is received at any section, the operator answersit by inserting one of her answering plugs into the correspondingjack. Having learned the number of the subscriber called for,she inserts the corresponding connecting plug into the transfer jackconnected by a trunk line with a plug at the board where the lineof the subscriber called for terminates. She then communicatesby order wire with the operator at that board, who picks up thetransfer plug designated and inserts it into the jack of the calledsubscriber. The connection between any two subscribers is thusmade complete by the use of three plugs. This style of transfersystem has proven its adaptability to service in magneto systemsof medium size, where the number of calls per subscriber per daywas not excessive. The most notable success made in the handling of transfer sys-tems in the Eastern portion of the United States has been made bythe City Telephone Company of Grand Rapids, Mich. The system 191- w. / L

Text Appearing After Image:

2G1 262 AMERICAN TELEPHOXE PRACTICE. used in the exchange of this company is a modification of the Cook-Beach system, being shown in some detail in Fig. 224. It may be said that as applied to manual switch-boards the trans-fer system has been, and is being, gradually relegated to the past.

american telephone practice 1905 western electric switchboards wilmington delaware book illustrations electric generators magneto high resolution images from internet archive library of congress grand rapids michigan

1905

Library of Congress

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public domain