television programs by highly directional radio microwaves that are
received and sent on from one booster station to another on an optical
path.
NMT - Nordic Mobile Telephone; an analog cellular telephone system that
was developed jointly by the national telecommunications authorities of
the Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden).
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.
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.
tro