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Search found 1 match for A4A

by Jake_Sykes
on Wed 05 Jul 2023, 5:01 am
 
Search in: JFK
Topic: Long distance calls in 1963
Replies: 5
Views: 399

Long distance calls in 1963

This site details history of the necessary switching machines:
https://telephoneworld.org/long-distance-companies/att-long-distance-network/history-of-att-long-lines/historical-4a-4m-crossbar-tandem-list/
Dallas and New Orleans were among the earliest cities to get them in 1951 and 1953, respectively:

These thirteen machines were originally called #A4A machines. This
stood for “Anticipated” #4 “Advanced”. They were originally installed
withOUT any card-translator boxes, however they were manufactured for
“easy” addition of card-translators when they became perfected for use
in 1953. Unfortunately, I don’t have the dates that these machines
added their card-translators, other than that it was during/after 1953.

Topics tagged under a4a on REOPENKENNEDYCASE P8ZL67JY2RRDgAAAABJRU5ErkJggg==

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