Long-Distance Communications definition of Long-Distance Communications in the Free Online Encyclopedia.

Long-Distance Communications

telephone and telegraph service over wire and radio systems between correspondents located at great (virtually unlimited) distances from each other. The term “long-distance communications” arose in the technology of transmission of electrical signals over wire communications lines; a synonym is “intercity communications,” and an antonym is “local communications” (within a city or raion).

Telephone, telegraph, phototelegraph, and television signals are transmitted simultaneously over long distances over air, cable, and radio communications lines in which hundreds or thousands of independent communications channels are formed by multiplexing communications lines. The use of artificial earth satellites for long-distance communications is promising. To compensate for signal attenuation, attended and unattended (remote-controlled) repeater stations or relay stations with amplifiers for the transmitted signals are installed on some sections of long-distance ground lines. For deep-sea (cable) long-distance communications unattended repeaters with long service life are installed at certain intervals along the length of the cable. Reliable continuous communications are ensured by the use of standby equipment and automated long-distance communications lines.

N. M. IZIUMOV

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No references found	GE Digital Energy has announced the MDS SD2, a software-controlled digital radio that is said to provide long-distance communications over licensed radio bands and allow users to deploy IP/Ethernet and serial communications using 200 MHz. GE Digital Energy by Pipeline & Gas Journal This type of feature is critical for long-distance communications and is currently available only with Chelsio's 10 gigabit ethernet controllers. Chelsio's 10Gb Ethernet Protocol Engines Set New Internet2 IPv6 Land ... by PR Newswire in February 1999, making long-distance communications considerably more difficult, especially for Cuban families divided across the Florida Straits. CUBA TO RESTORE U.S. PHONE LINKS by Caribbean Update	long varnish Long Walls long wave Long Waves Long's coefficient Long, Crawford Long, Crawford Williamson Long, Earl Long, Earl Kemp Long, Huey Long, Huey P. Long, Huey Pierce Long, John Davis Long, John Luther Long, Loch Long, Marguerite Long, Russell B. Long, Stephen Harriman long-and-short work long-base-line system Long-Clawed Ground Squirrel Long-Clawed Mole Vole long-conductor antenna long-day plant long-day response Long-Distance Communications long-distance loop long-distance navigation long-distance running long-distance xerography Long-Eared Fox Long-Eared Owl Long-Eared White Swine long-haul carrier system long-haul radio long-hole drill long-hole jetting long-life items long-life lamp long-line current long-line effect long-lines engineering long-nose pliers long-oil alkyd long-oil varnish long-period tide long-period variable long-persistence screen long-pillar work long-playing long-playing record	Long-Chain Acyl-CoA Esters Long-chain Fatty Acid Long-chain hydroxyacyl-CoA dehydrogenase deficiency long-chain molecule Long-Chain Mono-Unsaturated Long-Chain Polyamine Long-Chain Polyunsaturated Fatty Acid Long-Chain Saturated Fatty Acid Long-Circulating Monensin Nanoparticles Long-clawed Ground Squirrel Long-Clawed Mole Vole long-clawed prawn long-coats long-conductor antenna long-continued long-dated long-day long-day plant long-day plant long-day response long-delayed Long-Delayed Radio Echoes long-distance long-distance long-distance call long-distance call long-distance call Long-Distance Caregiving Long-Distance Communications Long-Distance Dad Long-Distance Dads Long-Distance Learning Program long-distance loop long-distance navigation Long-distance Polymerase Chain Reaction Long-Distance Range Finder long-distance runner Long-distance Running Long-distance telephone service Long-distance telephone service Long-distance track event Long-distance track event long-distance xerography Long-Distance Xerox Long-drawn Long-drawn long-drawn-out long-drawn-out Long-drink Long-drinks Long-eared long-eared bat long-eared bats Long-Eared Fox long-eared owl long-eared owl Long-Eared White Swine Long-endurance mobile submarine simulator

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GE Digital Energy has announced the MDS SD2, a software-controlled digital radio that is said to provide long-distance communications over licensed radio bands and allow users to deploy IP/Ethernet and serial communications using 200 MHz.

GE Digital Energy by Pipeline & Gas Journal

This type of feature is critical for long-distance communications and is currently available only with Chelsio's 10 gigabit ethernet controllers.

Chelsio's 10Gb Ethernet Protocol Engines Set New Internet2 IPv6 Land ... by PR Newswire

in February 1999, making long-distance communications considerably more difficult, especially for Cuban families divided across the Florida Straits.

CUBA TO RESTORE U.S. PHONE LINKS by Caribbean Update

Long, Crawford Williamson