The significance of PTAT-1 is that it broke the international telecommunication monopoly held by AT&T Corporation and British Telecom (BT) for telecommunications between the US and UK.
The UK to US section of the cable was shut down just after 02:00hours on 8 February 2004, as it was no longer considered financially viable by Cable & Wireless. Competitors to the cable had dropped their prices drastically after they re-emerged from Chapter 11 Bankruptcy with little or no debts to service, something C&W was unable to compete with.[citation needed]
This cable provided intelligent repeaters that counted bit errors which were reported in response to interrogation from a base station. It contained three fibre pairs which were used to provide two active channels. Each repeater included a base station-controlled cross-over data switch to swap traffic through a choice of two fibre pairs, the switch connections in successive repeaters enabled any desired connection to be made and provide a diversity path when required.
Telecommunications in Cameroon include radio, television, fixed and mobile telephones, and the Internet.
Telecommunications in France are highly developed. France is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available, expanding rapidly, and includes roaming service to foreign countries.
Communications in Gibraltar comprise a wide range of telephony systems, Internet access, broadcasting and satellite control. There is also printed and online media. Regulation of telecommunications and broadcasting are the responsibility of the Gibraltar Regulatory Authority (GRA), established by means of the Gibraltar Regulatory Authority Act in 2000.
Telecommunications in New Zealand are fairly typical for an industrialised country.
Censorship and the issue of media freedom in Russia have been main themes since the era of the telegraph. Radio was a major new technology in the 1920s, when the Communists had recently come to power. Soviet authorities realized that the "ham" operator was highly individualistic and encouraged private initiative– too much so for the totalitarian regime. Criminal penalties were imposed but the working solution was to avoid broadcasting over the air. Instead radio programs were transmitted by copper wire, using a hub and spoke system, to loudspeakers in approved listening stations, such as the "Red" corner of a factory. Due to the enormous size of the country Russia today leads in the number of TV broadcast stations and repeaters. There were few channels in the Soviet time, but in the past two decades many new state-run and private-owned radio stations and TV channels appeared.
The telecommunication infrastructure of Singapore spans the entire city-state. Its development level is high, with close accessibility to the infrastructure from nearly all inhabited parts of the island and for all of the population, with exceptions. Today, the country is considered an international telecommunications hub, an achievement that was driven by Singapore's view that high-quality telecommunications is one of the critical factors that support its economic growth.
Network topology is the arrangement of the elements of a communication network. Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial fieldbusses and computer networks.
A submarine communications cable is a cable laid on the sea bed between land-based stations to carry telecommunication signals across stretches of ocean and sea. The first submarine communications cables laid beginning in the 1850s carried telegraphy traffic, establishing the first instant telecommunications links between continents, such as the first transatlantic telegraph cable which became operational on 16 August 1858. Subsequent generations of cables carried telephone traffic, then data communications traffic. Modern cables use optical fibre technology to carry digital data, which includes telephone, Internet and private data traffic.
Telecommunications in Australia refers to communication in Australia through electronic means, using devices such as telephone, television, radio or computer, and services such as the telephony and broadband networks. Telecommunications have always been important in Australia given the 'tyranny of distance' with a dispersed population. Governments have driven telecommunication development and have a key role in its regulation.
A communication channel refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer networking. A channel is used to convey an information signal, for example a digital bit stream, from one or several senders to one or several receivers. A channel has a certain capacity for transmitting information, often measured by its bandwidth in Hz or its data rate in bits per second.
Base station is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a "land station in the land mobile service."
Cable & Wireless plc was a British telecommunications company. In the mid-1980s, it became the first company in the UK to offer an alternative telephone service to British Telecom. The company later offered cable TV to its customers, but it sold its cable assets to NTL in 2000. It remained a significant player in the UK telecoms market and in certain overseas markets, especially in the former British colonies of the Caribbean, where it was formerly the monopoly incumbent. It was also the main supplier of communication in the British South Atlantic, including Saint Helena and the Falkland Islands. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index.
Fiber to the x or fiber in the loop is a generic term for any broadband network architecture using optical fiber to provide all or part of the local loop used for last mile telecommunications. As fiber optic cables are able to carry much more data than copper cables, especially over long distances, copper telephone networks built in the 20th century are being replaced by fiber.
A computer network is a set of computers sharing resources located on or provided by network nodes. The computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are made up of telecommunication network technologies, based on physically wired, optical, and wireless radio-frequency methods that may be arranged in a variety of network topologies.
Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave range of the electromagnetic spectrum. Microwave signals are normally limited to the line-of-sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter, but such systems are expensive and generally used only in specialist roles.
The following outline is provided as an overview of and topical guide to telecommunication:
Telecommunications Engineering is an engineering discipline centered on electrical and computer engineering which seeks to support and enhance telecommunication systems. The work ranges from basic circuit design to strategic mass developments. A telecommunication engineer is responsible for designing and overseeing the installation of telecommunications equipment and facilities, such as complex electronic switching systems, and other plain old telephone service facilities, optical fiber cabling, IP networks, and microwave transmission systems. Telecommunications engineering also overlaps with broadcast engineering.
The Internet in Africa is limited by a lower penetration rate when compared to the rest of the world. Measurable parameters such as the number of ISP subscriptions, overall number of hosts, IXP-traffic, and overall available bandwidth all indicate that Africa is far behind the "digital divide". Moreover, Africa itself exhibits an inner digital divide, with most Internet activity and infrastructure concentrated in South Africa, Morocco, Egypt as well as smaller economies like Mauritius and Seychelles.
Private Trans-Atlantic Telecommunication Systems, was an American telecommunications company.
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that feasible with the human voice, but with a similar scale of expediency; thus, slow systems are excluded from the field.
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