Telecom networks Definitions

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    100 Gigabit Ethernet (100GbE)

    100 Gigabit Ethernet (100GbE) is a standard in development that will enable the transfer of Ethernet frames at 100 gigabits per second (gp/s). The 100GbE standard is for core switching. A 40GbE standard, in development simultaneously, is designed for server connectivity. Both standards are expected to be ratified in 2010.

  • 32-bit IP addressing

    32-bit IP addressing is the IP address scheme used in Internet Protocol 4 (IPv6 uses a 128-bit system)... (Continued)

  • 3G (third generation of mobile telephony)

    3G refers to the third generation of mobile telephony (that is, cellular) technology. The third generation, as the name suggests, follows two earlier generations. (Continued....)

  • A

    A-Law

    A-Law is the standard codec (compression/decompression) algorithm for pulse code modulation (PCM) from the ITU-T (the Telecommunication Standardization Sector of the International Telecommunications Union).

  • AAUI (Apple attachment unit interface)

    An AAUI (Apple attachment unit interface) is the 14- or 15-pin port or connection interface on earlier models of Macintosh computers that allowed it to be connected by a short interface cable (or "transceiver") to an Ethernet cable.

  • access point base station

    Access point base station is the original term for what is now known as a femtocell.

  • ACTA (America's Carriers Telecommunications Association)

    ACTA (America's Carriers Telecommunications Association) is a lobbying organization for over 165 small long-distance telephone carrier companies.

  • ACTS (Automatic Coin Telephone System)

    ACTS (Automatic Coin Telephone System) is a public coin-operated telephone service that completes a variety of phone calls, times the calls, and collects payment without the aid of an operator.

  • Advanced Intelligent Network (AIN)

    The Advanced Intelligent Network (AIN) is a telephone network architecture that separates service logic from switching equipment, allowing new services to be added without having to redesign switches to support new services.

  • ARPA (Advanced Research Projects Agency)

    An agency of the United States Department of Defense, ARPA (Advanced Research Projects Agency) underwrote development for the precursor of the Internet, known as ARPANET. Initially a modest network of four interconnected university computers, ARPANET's initial purpose was to enable mainly scientific users at the connected institutions to communicate and share resources.

  • ARPANET

    ARPANET was the network that became the basis for the Internet. Based on a concept first published in 1967, ARPANET was developed under the direction of the U.S. Advanced Research Projects Agency (ARPA). In 1969, the idea became a modest reality with the interconnection of four university computers.

  • asymmetric communications

    In telecommunications, the term asymmetric (also asymmetrical or non-symmetrical) refers to any system in which the data speed or quantity differs in one direction as compared with the other direction, averaged over time.

  • asynchronous

    In general, asynchronous (pronounced "ay-SIHN-kro-nuhs," from Greek "asyn," meaning "not with," and "chronos," meaning "time") is an adjective describing objects or events that are not coordinated in time.

  • ATM (asynchronous transfer mode)

    ATM (asynchronous transfer mode) is a dedicated-connection switching technology that organizes digital data into 53-byte cell units and transmits them over a physical medium using digital signal technology.

  • ATU-R (ADSL Terminal Unit - Remote)

    An ATU-R (ADSL Terminal Unit - Remote), sometimes called an "ADSL modem," is a hardware unit that is installed in any computer that uses a telephone company connection with Asymmetric Digital Subscriber Line (ADSL) service.

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