Automatic Switching Center (AUTODIN) at Phu Lam Signal Faclity, June 1969. Edited from US Army film at National Archives: Shot List: "Bank of recorder/reproducer signal data machines (RD-304). Soldier at maintenance console. Officer checks with men at supervisory cousole. Soldier operates automatic sender/receiver machine (ASR). Soldier checking timing on modulator. Soldier operates autodin ASC-2 simulator. Soldier monitoring circuit for distortion. Soldier sends tape through the computer 2020. He pushes buttom at the 360 system. Soldier receives message cards at the IBM 2520 machine.