HD Over Coax now represents a cost-effective solution for transmitting HD video without the complexity of IP. EX-SDI (Extended Serial Digital Interface) can reuse existing RG59 coax, eliminating the need to run new cable if an existing analog system is in place. Unlike IP, there is no extra training required, no complex networks to set up, and no bandwidth issues. All analog installers already know the fundamentals of installing a coax-based system. Get the same high-resolution benefit of an IP megapixel system but without the headache.