A multiple channel demand assignment multiple access (DAMA) system is configured as a spoke-and-hub star network in which a satellite relays information between each of many small-aperture terminals (SATs), which may be portable terminals (PTs), and a hub network control terminal (NCT) which receives...http://www.google.co.uk/patents/US5392450?utm_source=gb-gplus-sharePatent US5392450 - Satellite communications system
