One-way satmodems (DVB-IP modems ) use a return channel not based on communication with the satellite, such as telephone or cable.
Two-way satmodems (DVB-RCS modems, also called astromodems) employ a satellite-based return channel as well; they do not need another connection. DVB-RCS is ETSIstandardEN 301 790.
... km² (2.1 mi²) of it is land and 0.3 km² (0.1 mi²) of it is water. The total area is 5.83% water.
Demographics
As of the census of 2000, there are ...