Vintage 1982: This Excellent Telephone History documentary describes the development of telephone switching technology and the evolution of the “Telephone Exchange.” A British Telecom educational film. (Slightly edited from the original, run time 17 mins.)
A “TELEPHONE EXCHANGE” is a telecommunications system used to interconnect telephone subscriber lines (customers) to establish telephone calls between subscribers. An “exchange” is sometimes referred to as a “central office” or a “telephone switch.” Terminology may differ depending on where the term is used.
See British Telecom’s Telecommunications History:
For 2k and 4k Stock footage, visit PERISCOPE FILM.com
See more Computer History and Technology History videos at:
“Computer History Archives Project”