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.
tropospheric scatter-a form of microwave radio transmission
in which the troposphere is used to scatter and reflect a fraction of
the incident radio waves back to earth; powerful, highly directional
antennas are used to transmit and receive the microwave signals;
reliable over-the-horizon communications are realized for distances up
to 600 miles in a single hop; additional hops can extend the range of
this system for very long distances.
trunk network-a network of switching centers, connected by
multichannel trunk lines.
UHF-ultra-high-frequency; any radio frequency in the 300- to
3,000-MHz range.
VHF-very-high-frequency; any radio frequency in the 30- to
300-MHz range.

Telephones: This entry gives the total number of subscribers.

Television-broadcast stations: This entry gives the total number of
separate broadcast stations plus any repeater stations.

Televisions: This entry gives the total number of television sets.

Terminology: Due to the highly structured nature of the Factbook
database, some collective generic terms have to be used. For example,
the word Country in the Country name entry refers to a wide variety of
dependencies, areas of special sovereignty, uninhabited islands, and
other entities in addition to the traditional countries or independent
states. Military is also used as an umbrella term for various civil
defense, security, and defense act