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David Grace, 376th Expeditionary Communications Squadron contractor, uses an impact tool to cross-connect phone lines from one line block to another. The tool terminates telephone line cuts by securing the copper to the phone block. The 376 ECS expects to have all base DSN numbers changed and running through the new phone switch by Nov. 23. (U.S. Air Force Photo/Master Sgt. Mitch Gettle)
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