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.
Statsionar - Russia's geostationary system for satellite
telecommunications.
submarine cable - a cable designed for service under water.
TAT - Trans-Atlantic Telephone; any of a number of high-capacity
submarine coaxial telephone cables linking Europe with North America.
telefax - facsimile service between subscriber stations via the
public switched telephone network or the international Datel network.
telegraph - a telecommunications system designed for unmodulated
electric impulse transmission.
telex - a communication service involving teletypewriters
connected by wire through automatic exchanges.