A method for transmitting broadcast and narrowcast services in a system having a headend, a hub connected the headend, and a plurality of nodes connected to the hub. Instead of transmitting the signals directly from the headend to each node, the signals are transmitted from the headend to the hub. The...http://www.google.es/patents/US6295148?utm_source=gb-gplus-sharePatente US6295148 - Optical network for transmitting two-way multicast signals
Optical network for transmitting two-way multicast signals
