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  2. Optical Carrier transmission rates - Wikipedia

    en.wikipedia.org/wiki/Optical_Carrier...

    Optical Carrier classifications are based on the abbreviation OC followed by a number specifying a multiple of 51.84 Mbit/s: n × 51.84 Mbit/s => OC-n.For example, an OC-3 transmission medium has 3 times the transmission capacity of OC-1.

  3. International Code of Signals - Wikipedia

    en.wikipedia.org/wiki/International_Code_of_Signals

    The Medical Signal Code (incorporated in the International Code of Signals since 1930) is a means of providing assistance when medical personnel are not present. Plain language is generally preferred in such cases (presumably via radiotelephone), but the various codes provide a succinct method of communicating to a doctor the nature of the problem where there are language or communication ...

  4. Hybrid fiber-coaxial - Wikipedia

    en.wikipedia.org/wiki/Hybrid_fiber-coaxial

    Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable.It has been commonly employed globally by cable television operators since the early 1990s.

  5. Time-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Time-division_multiplexing

    Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern.