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  • Toll Free: 800-522-2025
    (USA, Canada, Mexico, Caribbean)
    International: 845-246-3036
    Fax:: 845-246-1757

    Hours of Operation:
    8:30am - 7:00pm Eastern
    Monday - Friday

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      Communications Specialties, Inc. (CSI) is an award-winning company that manufactures and sells a variety of products for the distribution, conversion or transmission of television and computer video signals, including fiber optic transmission systems, scan converters and video scalers.

      The company was founded in 1983 by veterans of the broadcast industry. Since then, CSI has managed to consistently design innovative products that are used worldwide by Fortune 500 Companies and Government Agencies in a variety of markets such as Broadcast, Professional A/V, Videoconferencing, Education, Home Theater, Security, ITS, Industrial Monitoring, Government/Military and more!

      Markertek is an authorized dealer for the entire Communications Specialties line. If you don't see what you're looking for, contact us and we'll do our best to get it for you.