Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 357
ve side of the connector bank is connected to the ring side ofthe manual-switchboard multiple, and the corresponding private contactsof the connector bank are connected to the sleeve multiple of the manualswitchboard. The result is that whenever the connector switchcompletes connection to any line,… … CUT-OVERS AND INTERCONNECTING OFFICES 333 On the other hand, whenever a connector switch finds a line made busy,in one of its jack, in the manual switchboard, a circuit may be tracedfrom negative battery of the manual switchboard, through the lamp andcontact of cord relay B, resistance coil 2, the…
Telephone
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