Which of the following statements is true regarding coax cables?

Coaxial cables, commonly referred to as coax cables, are indeed interchangeable between CATV (Community Access Television) and CCTV (Closed-Circuit Television) systems. This is because both types of systems utilize coaxial cable's design, which includes a central conductor, insulating layer, shielding, and an outer insulating layer. This construction allows coax cables to effectively transmit video signals over varying distances without significant loss of quality.

The other statements are inaccurate. While coax cables can carry various signal types, they are not exclusively used for television, as they can also transmit data and audio. Furthermore, the notion that coax cables are always higher voltage is misleading, as the voltage levels can vary based on the application. Lastly, it is incorrect to state that coax cables are not suitable for any video transmission since they are widely employed for such purposes in both television and security camera installations. The versatility of coaxial cables makes them a preferred choice for numerous applications in the broadcasting and security industries.