pdf WE SxS Course No. 3 - 1947 - Dial Telephone System Popular
By Paul F 270 downloads
CO_Equip_Lesson_3_SXS_Dial_Oct49_tci.pdf
THE STEP-BY-STEP DIAL TELEPHONE SYSTEM, Telephone Systems Training
Course: Central Office Equipment, Lesson no. 3
Issued March 1937, Revised Jan. 1947, Reissued Oct. 1949
56 pages
Western Electric Company, Inc., Hawthorne Works
Personnel Service 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
Contributed by John Novack
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