GSM - a global system for mobile (cellular) communications devised by the Groupe Special Mobile of the pan-European standardization organization, Conference Europeanne des Posts et Telecommunications (CEPT) in 1982.
HF - high frequency; any radio frequency in the 3,000- to 30,000-kHz range.
Inmarsat - International Maritime Satellite Organization (London); provider of global mobile satellite communications for commercial, distress, and safety applications at sea, in the air, and on land.
Intelsat - International Telecommunications Satellite Organization
(Washington, DC).
Intersputnik - International Organization of Space Communications
(Moscow); first established in the former Soviet Union and the East
European countries, it is now marketing its services worldwide with
earth stations in North America, Africa, and East Asia.
Landline - communication wire or cable of any sort that is installed on poles or buried in the ground.
Marecs - Maritime European Communications Satellite used in the
Inmarsat system on lease from the European Space Agency.
Marisat - satellites of the Comsat Corporation that participate in the
Inmarsat system.
Medarabtel - the Middle East Telecommunications Project of the
International Telecommunications Union (ITU) providing a modern
telecommunications network, primarily by microwave radio relay, linking
Algeria, Djibouti, Egypt, Jordan, Libya, Morocco, Saudi Arabia,
Somalia, Sudan, Syria, Tunisia, and Yemen; it was initially started in
Morocco in 1970 by the Arab Telecommunications Union (ATU) and was
known at that time as the Middle East Mediterranean Telecommunications
Network.
Microwave radio relay - transmission of long distance telephone calls and television programs by highly directional radio microwaves that are received and sent on from one booster station to another on an optical path.