Hybrid fiber coax

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Scheme of an HFC distribution

Hybrid Fiber Coax ( HFC ) is an abbreviation for a specific technology that enables the transmission of analog and digital signals with high data transmission rates (such as television signals) in a wired manner. To distribute the signals in the regional area, fiber optic lines are used that lead to the vicinity of the households ( FTTC , fiber to the curb). At the end points of the glass fibers, the optical signals are converted into electrical signals, which are then fed to the individual households via coaxial cables . Usually several households are supplied by one coaxial cable. HFC networks are usually used for cable television and are often equipped with a digital return channel over which the user can control the television transmission individually ( video on demand ). In addition, cable companies operate the Internet and telephone signals over the HFC network. Despite the shared medium, high bandwidths on the Internet are possible via HFC. The major German cable providers currently already provide up to 1Gbit / s despite shared lines.

This technology has been standardized by the SCTE ( Society of Cable Telecommunications Engineers ). The standards are protected by copyright, but can be accessed from the SCTE website for personal use only. However, the HFC networks installed in different countries generally do not use these standards.


  • Roger L. Freeman: Fundamentals of Telecommunications. 2nd edition, John Wiley & Sons Inc., Hoboken 2005, ISBN 0-471-71045-8 .
  • Jeff Hecht: Understanding Fiber Optics. 5th edition, Laser Light Press, Auburndale 2015, ISBN 1-511-44565-3 .
  • Andres Keller: Broadband cables and access networks. Technical principles and standards. Springer-Verlag, Berlin / Heidelberg 2011, ISBN 978-3-642-17631-9 .

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