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  2. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...

  3. List of common resolutions - Wikipedia

    en.wikipedia.org/wiki/List_of_common_resolutions

    Television and Media. For television, the display aspect ratio (DAR) is shown, not the storage aspect ratio (SAR); analog television does not have well-defined pixels, while several digital television standards have non-square pixels.

  4. Walter Houser Brattain 1956年ノーベル物理学賞 [1902年2月10日生] wikipedia - ウォルター・ブラッテン 1988年 麻生薫 (女優(宝塚歌劇[元](52期))) <41歳> [1947年2月28日生] wikipedia - 麻生薫 1990年 7代目市川門之助 (歌舞伎役者) <62歳> [1928年9月7日生] wikipedia - 市川門之助 (7代目 ...

  5. List of international call prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_international_call...

    00xx, where xx is a two-digit carrier selection code: . Australia, in parallel to the standard prefix 0011 for the default carrier . 0014 – Primus 0018 – Telstra 0019 – Optus

  6. List of United States wireless communications service ...

    en.wikipedia.org/wiki/List_of_United_States...

    The big three wireless telecommunications facilities-based service providers by subscriber count in the United States are: Verizon: 142.8 million (Q2 2022); T-Mobile US: 110.0 million (Q2 2022)

  7. Feed horn - Wikipedia

    en.wikipedia.org/wiki/Feed_horn

    A feed horn (or feedhorn) is a small horn antenna used to couple a waveguide to e.g. a parabolic dish antenna or offset dish antenna for reception or transmission of microwave.

  8. Characteristic impedance - Wikipedia

    en.wikipedia.org/wiki/Characteristic_impedance

    The characteristic impedance or surge impedance (usually written Z 0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.

  9. Bell Labs - Wikipedia, la enciclopedia libre

    es.wikipedia.org/wiki/Bell_Labs

    Tres científicos más de Bell Labs reciben el premio Nobel Walter Houser Brattain, William Shockley, y John Bardeen. 1948: Claude Shannon cuantifica la información (Teoría de la Información) y da a los ingenieros un máximo teórico basado en las matemáticas de la capacidad de transporte de información para cualquier sistema de comunicación.

  10. Signalling System No. 7 - Wikipedia

    en.wikipedia.org/wiki/Signalling_System_No._7

    The SS7 protocol stack may be partially mapped to the OSI Model of a packetized digital protocol stack. OSI layers 1 to 3 are provided by the Message Transfer Part (MTP) and the Signalling Connection Control Part (SCCP) of the SS7 protocol (together referred to as the Network Service Part (NSP)); for circuit related signaling, such as the BT IUP, Telephone User Part (TUP), or the ISDN User ...

  11. Bandwidth (computing) - Wikipedia

    en.wikipedia.org/wiki/Bandwidth_(computing)

    In computing, bandwidth is the maximum rate of data transfer across a given path. Bandwidth may be characterized as network bandwidth, data bandwidth, or digital bandwidth. ...