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Twisted Pair

2.1. Cables and Connectors. TestOut Network Pro. Twisted Pair. Section Skill Overview. Select and install cables to connect a DSL modem Select and install cables to connect to an Ethernet network. TestOut Network Pro. Key Terms. Crosstalk UTP STP Plenum space Riser space.

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Twisted Pair

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  1. 2.1 Cables and Connectors TestOut Network Pro Twisted Pair

  2. Section Skill Overview • Select and install cables to connect a DSL modem • Select and install cables to connect to an Ethernet network TestOut Network Pro

  3. Key Terms • Crosstalk • UTP • STP • Plenum space • Riser space TestOut Network Pro

  4. Key Definitions • Crosstalk: An unwanted transfer of signals between communication channels. • UTP: UTP stands for unshielded twisted pair. UTP cables are easy to work with and less expensive than shielded cables. • STP: STP stands for shielded twisted pair. Shielding is electrically conductive foil or braided material that is wrapped around pairs of wires, around the overall cable, or both. TestOut Network Pro

  5. Key Definitions • Plenum space: A plenum space is a part of a building that provides a pathway for the airflow needed by heating and air conditioning systems, such as above a dropped ceiling or below a raised floor. • Riser space: An area that connects multiple floors where cables can be run. This area cannot be a plenum space. TestOut Network Pro

  6. Twisted Pair TestOut Network Pro

  7. Twisted Pair TestOut Network Pro

  8. Twisted Pair TestOut Network Pro

  9. Twisted Pair TestOut Network Pro

  10. Twisted Pair TestOut Network Pro

  11. Twisted Pair Advantages • Very flexible • Less expensive • Easy to work with • Works with newer protocols TestOut Network Pro

  12. Twisted Pair TestOut Network Pro

  13. Twisted Pair Disadvantages • Susceptible to interference • Susceptible to eavesdropping TestOut Network Pro

  14. Plenum and Riser • Plenum space: airflow pathway • Plenum rated cable is required • Riser rated cable for riser spaces • Plenum rated can be used for riser TestOut Network Pro

  15. Twisted Pair TestOut Network Pro

  16. Twisted Pair TestOut Network Pro

  17. Twisted Pair TestOut Network Pro

  18. Summary • Twisted pairs reduce crosstalk • Shielding reduces EMI effects • Plenum cables for plenum spaces • Categories from Cat 3 to Cat 7 • Connectors: RJ11, RJ45, GG45, TERA TestOut Network Pro

  19. In-Class Practice Do the following labs: • 2.1.3 Connect to an Ethernet Network TestOut Network Pro

  20. Class Discussion • Why are wires twisted together in twisted pair cables? • What is the difference between STP cabling and UTP cabling? • What is the difference between Cat 3, Cat 5e, and Cat 6a cables? • How can you tell the difference between RJ11 and RJ45 connectors? • You have an installation that requires Cat 5 cabling. Which cable ratings could you use for the installation? TestOut Network Pro

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