pdf WE SxS Course No. 3 - 1958 - Dial Telephone System Popular

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THE STEP-BY-STEP DIALTELEPHONESYSTEM, Telephone Systems Training
Course: Central Office Equipment, Lesson no. 3
Issued March 1937, Revised 1958

59 pages

Western Electric Company, Inc., Hawthorne Works
Industrial Relations Branch, Training Department

CONTENTS
Section 1 . History and Development
Section 2 . Principles of Dial Switching
Section 3 . Equipment and Frames
Section 4 . Distributing Frames and Relay Racks
Section 5 . Method of Operation
Section 6 . Power
Section 7 . SxS Circuit Operation