Manual Switchboards By K. B. Miller and S. G. McMeen Page 317
[CHAPTER XX]—The Telephone Exchange—Subscribers', Trunk, and Toll Lines—Districts—Switchboards
[CHAPTER XXI]—Simple Magneto Switchboard—Operation—Commercial Types of Drops and Jacks—Manual vs. Automatic Restoration—Switchboard Plugs and Cords—Ringing and Listening Keys—Operator's Telephone Equipment—Circuits of Complete Switchboard—Night-Alarm Circuits—Grounded and Metallic Circuit Line—Cord Circuit—Switchboard Assembly
[Review Questions] Page 387
[Index] Page 401
[A] For professional standing of authors, see list of Authors and Collaborators at front of volume.
List of Photographs
[A TYPICAL SMALL MAGNETO SWITCHBOARD INSTALLATION]
![[A TYPICAL SMALL MAGNETO SWITCHBOARD INSTALLATION]](#1895676483475499077_pic_p011.jpg.id-6444820749136667165.wrap-0.html.html){kind=link}
[A TYPICAL CENTRAL OFFICE FOR RURAL EXCHANGE
Line Protectors on Wall at Left.]
![[A TYPICAL CENTRAL OFFICE FOR RURAL EXCHANGELine Protectors on Wall at Left.]](#1895676483475499077_pic_p012.jpg.id-1872692328416818122.wrap-0.html.html){kind=link}
![[OLD BRANCH-TERMINAL MULTIPLE BOARD, PARIS, FRANCE]](#1895676483475499077_pic_p016.jpg.id-1855789591768456136.wrap-0.html.html){kind=link}