The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 527
ranch Call Wire to speak with. The operator then joins the ordinary lines of thesetwo numbers by cords, plugs, and switch-jacks, as on anordinary board, enabling the subscribers concerned to ringor speak as they wish. When they have finished their con-versation they press the call-wire key, and… … ®\—-@
Telephone
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