AT&T offers turnkey and managed service digital signage, IP-TV, and content distribution networks that run on cellular (3G/4G), satellite, and terrestrial networks (and mixed hybrids). Moreover, the underlying web-based system runs on LINUX and supports LINUX and WINDOWS media players. If you’re already buying your transport from a tier one vendor, like AT&T, why not have them bear the capital costs and lease the system from them?