. American telephone practice . cordstrands. The operators telephone circuit, including a test battery,T, of one or two cells, was bridged to ground from the point oijunction between the coils of the clearing-out drop, 15 225 226 AMERICAN TELEPHONE PRACTICE. It will be seen that normally the circuit of the line extends throughthe contacts of the jack on each section to earth through the an-nunciator. A subscriber could therefore signal the central officeat any time. The operator at whose position this annunciator wasplaced would respond by inserting the answering plug into theanswering jack co
. American telephone practice . cordstrands. The operators telephone circuit, including a test battery,T, of one or two cells, was bridged to ground from the point oijunction between the coils of the clearing-out drop, 15 225 226 AMERICAN TELEPHONE PRACTICE. It will be seen that normally the circuit of the line extends throughthe contacts of the jack on each section to earth through the an-nunciator. A subscriber could therefore signal the central officeat any time. The operator at whose position this annunciator wasplaced would respond by inserting the answering plug into theanswering jack corresponding to the annunciator, which act wouldestablish connection with the line and at the same time cut off thecircuit of the drop by opening the contact between the springand its anvil. The operator could then by means of her listeningkey ascertain the number of the subscriber called for, and beforecompleting the connection would test his line by touching thecalling plug to the test ring of the multiple jack at her ^B CO DROP LI J_
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