Wisdom of the phone system

U.S. Air Force Staff Sgt. Blake Arnett, 35th Communications Squadron cyber transport systems craftsman, conducts a wire test as part of a phone line check at Misawa Air Base, Japan, April 22, 2014. The base’s phone line infrastructure currently encompasses more than 7000 active lines. (U.S. Air Force photo/Senior Airman Jose L. Hernandez-Domitilo)

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VIRIN: 140421-F-DT489-049.JPG
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