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Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the telegraph, telephone, television, and radio. Early telecommunication networks used metal wires as the medium for transmitting signals.
In telecommunications, a long line is a transmission line in a long-distance communications network such as carrier systems, microwave radio relay links, geosynchronous satellite links, underground cables, aerial cables and open wire, and Submarine communications cables.
Unlike the NNIIRT, this design bureau focused on higher frequency radars like the P-20, P-30, P-30M, P-35, P-32D2 and the P-50 (NATO: E/F-bands).These radars have better accuracy and faster scan rates, and are thus more suited for ground control of fighter aircraft, which complement the lower frequency radars developed by the NNIIRT design bureau.
Long-distance calling; Meteor burst communications This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188
3 Long-distance communication. 4 Home entertainment services. ... In 1923, the Wired Radio Service Company, a subsidiary of the local electric company, set up a ...
An interexchange carrier (IXC), in U.S. legal and regulatory terminology, is a type of telecommunications company, commonly called a long-distance telephone company.It is defined as any carrier that provides services across multiple local access and transport areas (interLATA).
Relays may be employed to extend the range for FSO communications. [10] [11] TMEX USA ran two eight-mile links between Laredo, Texas and Nuevo Laredo, Mexico from 1998 [12] to 2002. The links operated at 155 Mbit/s and reliably carried phone calls and internet service. [13] [dubious – discuss] [citation needed]
The General Mobile Radio Service (GMRS) is a land-mobile FM UHF radio service designed for short-range two-way voice communication and authorized under part 95 of the US FCC code. It requires a license in the United States , but some GMRS compatible equipment can be used license-free in Canada .