Transcontinental telephone line

GPTKB entity

Predicate	Object
gptkbp:instanceOf	industrial equipment historical technology
gptkbp:builtBy	gptkb:Bell_System gptkb:American_Telephone_and_Telegraph_Company
gptkbp:category	History of telecommunications 1915 establishments in the United States
gptkbp:completedIn	1914
gptkbp:connectsCity	gptkb:New_York_City gptkb:San_Francisco
gptkbp:constructionStartYear	1911
gptkbp:country	gptkb:United_States
gptkbp:enables	coast-to-coast voice communication
gptkbp:firstCallDate	January 25, 1915
gptkbp:firstCallParticipants	gptkb:Alexander_Graham_Bell gptkb:Woodrow_Wilson gptkb:Thomas_Watson gptkb:Theodore_Vail
gptkbp:historicalEvent	gptkb:Panama–Pacific_International_Exposition
https://www.w3.org/2000/01/rdf-schema#label	Transcontinental telephone line
gptkbp:length	3,400 miles
gptkbp:opened	1915
gptkbp:operatedBy	gptkb:AT&T
gptkbp:replacedBy	gptkb:Cyclops microwave relay
gptkbp:significance	First telephone line to connect the east and west coasts of the United States
gptkbp:technology	copper wire
gptkbp:bfsParent	gptkb:AT&T_(before_1996)
gptkbp:bfsLayer	6