Twin wire

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Twin wire
Twisted pair

In the double wire (abbreviated to DA , CuDA or CuDa ) is a line of two individual cores (insulated wires ), the conductor material usually made of copper ( Cu exists). The two individual wires are either together ( twisted pair ) or with further wires twisted (for example, star quad ).

The twist ensures that interference voltages caused by inductive coupling cancel each other out almost completely. This can prevent crosstalk . Up to 2000 twin cores can be combined in cables ; this is called pair stranding if they are each twisted in pairs. Often four single cores are twisted together to form a star quad, so that two cross-twisted twin cores are created. Twisted wires can also be laid individually in installation pipes or as routing .

The twin wire serves as a transmission medium for analog or digital signals in communication technology . For example, in the telephone network of analog switching technology, the subscriber connection line consists of a pair of wires.

Paired wires are usually used unshielded in telecommunications . In computer technology they are often shielded .

literature

  • Hubert Zitt: ISDN & DSL for PC and telephone. Verlag Markt + Technik, Munich 2005, ISBN 3-8272-6987-3 .
  • Volker Jung, Hans-Jürgen Warnecke (Hrsg.): Handbook for telecommunications. Springer Verlag, Berlin / Heidelberg 1998, ISBN 978-3-642-97703-9 .
  • Andres Keller: "Data transmission in the cable network". Technical principles and standards, 2nd edition, Springer Verlag, Berlin / Heidelberg 2005, ISBN 3-540-22501-3 .
  • Hermann Weidenfeller: Basics of communication technology . Springer Fachmedien, Wiesbaden 2002, ISBN 3-519-06265-8 .
  • Rudolf Nocker: Digital Communication Systems 2nd 1st edition, Friedrich Vieweg & Sohn Verlag, Wiesbaden 2005, ISBN 978-3-528-03977-6 .

Web links

Individual evidence

  1. ↑ The telephone network architecture (accessed on August 11, 2017)