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LAN Cabling

LAN Cabling. Prepared by:Mohammed Ayesh. Contents. Cable types Coaxial TP STP UTP fiber Optic Other Media. Types of cables. Coaxial Cable: widely used for radio frequency applications not susceptible to the effects of RFI EMI Ethernet originally used coaxial cables

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LAN Cabling

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  1. LAN Cabling Prepared by:MohammedAyesh

  2. Contents • Cable types • Coaxial • TP • STP • UTP • fiber Optic • Other Media

  3. Types of cables Coaxial Cable: • widely used for radio frequency applications • not susceptible to the effects of • RFI • EMI • Ethernet originally used coaxial cables • longer distances & higher transmission rates • 10base2 - 200m (185m), 10 Mbps • 10base5 - 500m, 10 Mbps • Ethernet/802.3 coax - 50, ARCNET coax 93

  4. Types of cables cont… Coaxial – cont… • Advantages: • higher speeds than UTP • supports broad band (multi channel) LANs • Disadvantages: • easily damaged • difficult to work with • expensive than UTP • for different LANs specific coax types needed

  5. Types of cables cont… Twisted Pair • The type depends on: • no. of pairs • no. of twists per unit length • gauge of the wire • type of insulation • Shielded Twisted Pair (STP): • expensive • higher data rate • easy to work with

  6. Types of cables cont… • Un-shielded Twisted Pair (UTP): • low cost • lower data rate • limited length • easy installation • flexible configuration (when star wired) • supports many LANs and voice communication in the same cable type • easy fault isolation

  7. Types of cables cont… • UTP Categories: • category 3 • Up to 16 Mbps • used for 10baseT Ethernet & 4 Mbps Token Ring • category 4 • Up to 20 Mbps • used for 16 Mbps Token Ring • category 5 • Up to 100 Mbps • 100baseT Ethernet

  8. Types of cables cont… • Fibre Optics • Advantages: • allows electrical isolation between LAN segments • difficult to tap • very high data rates • longer cabling distances • Disadvantages: • expensive • difficult to install • easy to damage

  9. Types of cables cont… Fibre Optics cont.. • backbone cables typically contain 12 or 24 fibres • multi-mode and single mode types • diameters: • Multimode • 62.5 m or 50 m core, 125 m cladding (human hair – 100 m) • single mode • 8 – 10 m core, 125 m cladding • multi mode: • signal jitter at far end can occur • easy coupling of the light source to the cable

  10. Types of cables cont… • bandwidth: • expressed as MHz-km • e.g.: 200 MHz-km  200 MHz, 1 km, or 100 MHz, 2 km • connectors: • ST (straight tip) – for 10 BASE FL • SC (subscriber connector) – for 100 BASE FX and 1000 BASE FX • MT-RJ – for 1000 BASE FX – more compact Cable splicing and fibre termination should be done by specialized people – requires skilled personnel and proper equipment

  11. Types of cables cont… Other LAN Media • Infrared • modulated infrared signals passed through open space • laser beam • modulated laser beams passed through open space • Microwave • high frequency radio waves passed by line of sight transceivers • Radio • earlier low speeds (9.6 - 230 kbps) - now 2-10 Mbps • used for mobile LAN stations when cabling is not possible

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