A man demonstrates telephone communication process and operators at a switchboard in a telecommunication center in the U.S.
United States USA Date:1918 Duration:2 min 3 sec Sound:NO SOUND
Telecommunication process demonstration at a telecommunication center in the United States. A diagram of a switchboard and telephone operation at the telecommunication center. A man pointing to the diagram demonstrates how a telephone call is received, routed and completed in the communication process. View of a switchboard. Three women telephone operators seated operate the switchboard.
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