Orbita - a Russian television service; also the trade name of a packet- switched digital telephone network.
Radiotelephone communications - the two-way transmission and reception of sounds by broadcast radio on authorized frequencies using telephone handsets.
PanAmSat - PanAmSat Corporation (Greenwich, CT).
SAFE - South African Far East Cable
Satellite communication system - a communication system consisting of two or more earth stations and at least one satellite that provide long distance transmission of voice, data, and television; the system usually serves as a trunk connection between telephone exchanges; if the earth stations are in the same country, it is a domestic system.
Satellite earth station - a communications facility with a microwave radio transmitting and receiving antenna and required receiving and transmitting equipment for communicating with satellites.
Satellite link - a radio connection between a satellite and an earth station permitting communication between them, either one-way (down link from satellite to earth station - television receive-only transmission) or two-way (telephone channels).
SHF - super high frequency; any radio frequency in the 3,000- to 30,000-MHz range.
Shortwave - radio frequencies (from 1.605 to 30 MHz) that fall above the commercial broadcast band and are used for communication over long distances.
Solidaridad - geosynchronous satellites in Mexico's system of international telecommunications in the Western Hemisphere.