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Traffic Department at Bell Telephone
Chief Operator at the traffic department, Mrs. E. Emery, gives advice to operators on the switchboard. Operators no longer use dials to make a call, instead numbers are "key pulsed" with buttons marked in the same way as the dial on the telephones.
Modern Central Office of Bell Telephone, #1
Thousands of relays form veritable canyons of equipment in the modern central office. At this section, customers' lines are connected into the circuits at the plant on Douglas Street, or re-routed when a subscriber moves so that the subscriber may…
Modern Central Office at Bell Telephone, #2
Power supply for the equipment contained in the central office is supplied from this three section rectifier panel in the basement of the building. The panel is also used to re-charge banks of batteries
Crossbar Central Office at Bell Telephone
When trouble develops in a crossbar central office, the equipment at the master test panel detects it, and will, upon the proper operation, produce a punched card giving the location of the trouble, the number called and the number calling, with the…