Histopry 1960 railroad wayside telephone system [telecom]

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Waystation phones on railroads are located at considerable
distances.  It was not possible to provide fully automatic
telephone service to them.  In 1960, the Automatic Electric Co.
developed a system to reach remote stations without an
intermediate operator.

It's described in the following article from Railway
Signaling Communications, 1960.

https://books.google.com/books?id=MDw7AAAAMAAJ&dq=railway%20signal%20p-a-x&pg=RA5-PA26#v=onepage&q&f=false

You may also scroll through the entire volume.  Many ads
for relays and communications products such as carrier,
microwave, radio, and cable.

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