Noun
English Wikipedia has an article on:Cable television headendWikipedia
headend (plural headends)
A cable TV control centre, at which terrestrial and satellite signals are received, monitored and injected into the cable network.
Most systems use hybrid fiber-coaxial (HFC) distribution; this means the trunklines that carry the signal from the headend to local neighborhoods are optical fiber to provide greater bandwidth and also extra capacity for future expansion. Source: Internet
Commercial advertisements for local business are also inserted in the programming at the headend (the individual channels, which are distributed nationally, also have their own nationally oriented commercials). Source: Internet