#Vintage #Telephone #Technology - Evolution of #DirectDialing #Calls - #Bell, #ATT #WesternElectric

"This #Film shows early #TelephoneEquipment and systems from the 1940’s up to the 1950’s, including telephone #TransmissionLines, early #Switchboards and #Operators, and the introduction of direct dialing systems and many aspects of the early #TelephoneSystem in use circa 1940-1950."

https://www.youtube.com/watch?v=rMtnvcMMtME&ab_channel=ComputerHistoryArchivesProject

#Documentary #TelephoneExchange #SDD #SubscriberTrunkDialing #Switching