Telephone Switchboard Operator

Telephone Switchboard Operator

4.11 - 1251 ratings - Source

A buzzer which is placed in series in one side of the circuit; not bridged across the circuit. - Cable, standard ... A diagram which shows graphically the various circuits in a telephone net, the actual connections, the code names of centrals, anbsp;...

Title:Telephone Switchboard Operator
Publisher: - 1923

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