What does CCTV SDM stand for?

Closed Circuit Television Switching & Distribution Matrix

This definition appears very rarely Other Resources:

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Confederation of Cameroon Trade Unions Cork Council of Trade Unions (Ireland) Critical Care Transport Unit Campzone Community Television Capital Community Television (Salem, Oregon) China Central Television Chittenden Community Television (Burlington, Vermont) Circuito Cerrado de Televisión Closed Circuit Television (aka CCT) Command and Control Training Vehicle		Child Care That Works Combat Crew Training Wing Council for Cosmetic Teeth Whitening (trade association; est. 2008) Cape Cod Toxic Waste Research Site Corpus Christi, Texas Cable Control Unit (Motorola) Cache Control Unit (Wyse) Cahier des Charges Utilisateur (French: User Specification) Calcutta, India - Calcutta (Airport Code) Camera Control Unit