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  • Global Technical Systems

    • Computers & Telecommunications
    2801 N. Jasper St.
    Decatur, IL 62526
    (217) 872-8000
    (217) 872-8021 (fax)
    • About

      GTSI provides sales and service to all manufacturers in the two-way radio industry. GTSI provides consultant services, outdoor warning sirens in Illinois and Missouri, and we offer an end to end wirel