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Telephone Museum of Virginia

1970s 4A Crossbar Switching Office

Relay Logic Drawings Used to Maintain This Switch


Related News Topic - Dated 1954

Click On Each Photo To Enlarge


Frame.jpg

4A View.jpg Announcement.jpg Cama C Pri.jpg ETS Tape.jpg


Sender Lk.jpg Curtis.jpg Curtis-s.jpg In & out links.jpg


Card Punch.jpg Gerry .jpg Jason.jpg


Interrupter.jpg Link Controller.jpg M F Sender.jpg TRCD.jpg Marker.jpg


PBC.jpg PBT Store.jpg Xbar Sw.jpg



Images courtesy of Curtis Anderson, longtime supporter & friend. His website

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