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CPET 355

CPET 355. 2. The Physical Layer - Guided Transmission Media Paul I-Hai Lin, Professor Electrical and Computer Engineering Technology Purdue University, Fort Wayne Campus. Guided Transmission Media. Twisted Pair Unshielded Twisted Pair, Shielded Twisted Pair

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CPET 355

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  1. CPET 355 2. The Physical Layer - Guided Transmission Media Paul I-Hai Lin, Professor Electrical and Computer Engineering Technology Purdue University, Fort Wayne Campus Prof. Paul Lin

  2. Guided Transmission Media • Twisted Pair • Unshielded Twisted Pair, Shielded Twisted Pair • Copper; Metal shield; Plastic cover • Coaxial Cable • Inner conductor: copper; outer conductor shield:metal foil, braid; plastic cover) • Fiber Optics • Core – glass; cladding – less dense glass or plastic; plastic cover Prof. Paul Lin

  3. Twisted Pairs • Shield twisted pair • IBM Token Ring cabling • Unshielded twisted pair (UTP) • Category 1 - < 100 Kbps, analog, Telephone • Category 2 - < 2 Mbps, A/D, T1-lines • Category 3 – 10 Mbps, digital, LANs • Category 4 – 20 Mbps, digital, LANs • Category 5 – 100 Mbps, digital, LANs • Category 6 – 400 Mbps, digital, LANs • Category 7 – 600 Mbps, digital, LANs Prof. Paul Lin

  4. Twisted Pairs • Un-shield twisted pair (UTP) • Category 3 - up to 16 MHz, voice and data on 10BaseT Ethernet • Category 5 • up to 100 MHz • 1000 Mbps (4-pair) 155 Mbps ATM, Gigabit Ethernet • Category 5E – 100 Mbps TPDDI, 155 Mbps ATM Prof. Paul Lin

  5. 10BaseT Cat 5 RJ 45 Cabling Pin Signal 1 TD+ 2 TD- 3 RD+ 4 Not Used 5 Not Used 6 RD- 7 Not Used 8 Not Used Prof. Paul Lin

  6. IEEE 10BaseT Connection Pin Label Color Code 1 T2 White/Orange 2 R2 Orange/White 3 T3 White/Green 4 R1 5 T1 6 R3 Green/White 7 T4 8 R4 Prof. Paul Lin

  7. EIA/TIA-568A and AT&T 258A Connector Specifications (Recommended by the IEEE for 100Base-TX and T4 operation; EIA – Electronics Industries Association, TIA – Telecommunications Industries Association) Pin Label Color Code 1 T2 White/Orange (Orange Stripe) 2 R2 Orange/White (Orange Solid) 3 T3 White/Green (Green Stripe) 4 R1 Blue/White (Blue Solid) 5 T1 White/Blue (Blue Stripe) 6 R3 Green/White (Green Solid) 7 T4 White/Brown (Brown Stripe) 8 R4 Brown/White (Brown Solid) Prof. Paul Lin

  8. EIA-TIA 586B Specification Prof. Paul Lin

  9. Cat 6 Cables • Category 6 – up to 400 MHz, super fast broad band applications • Cat 6 Cabling: A Standard and System Overview- published by Cat 6 Consortium http://www.tiaonline.org/marketdev/whitepapers/category6_81502.pdf Prof. Paul Lin

  10. Cat 7 Cables • Category 7 – 600 to 700 MHz, super fast broad band applications • http://www.reachome.com/en/cat67.htm Prof. Paul Lin

  11. Coaxial Cable • Categories (radio government rating) • RG-59: 75 ohms, CATV, cable modem • RG-58: 50 ohms, 10Base2 (200m) or Thin Ethernet • Rg-11: 50 ohms, 10Base5 (2000 m) or Thick Ethernet • Connectors • BNC (Bayone-Neill-Concelman) connector • BNC T connector • BNC Terminator Prof. Paul Lin

  12. Coaxial Cable • RF coaxial cable 75 ohms: http://www.elti.si/CABLES/KABLI/RF_COAXIAL_CABLES_75_Ohm.htm • RF coaxial cable 50 ohms: http://www.elti.si/CABLES/KABLI/RF_COAXIAL_CABLES_50_Ohm.htm Prof. Paul Lin

  13. Fiber Optics • Three major components • Light source: LED, Laser • Fiber • Detector: Photo diode Prof. Paul Lin

  14. Fiber Optics • Terms: • Refraction – the deflection of light • Wavelength  (f = c speed of light) - different wavelengths of light travel at different speed • Single-mode fiber – reduce fiber’s diameter to a few wavelength of light that enables the light to propagate in a straight line • Muiti-mode fiber – Multiple light waves bouncing at different angle. Prof. Paul Lin

  15. Fiber Optics • Terms: • Modulation • WDM – wavelength-division-multiplexing (http://www.spie.org/web/oer/october/oct97/multiplex.html) • DWDM – dense-wavelength-division-multiplexing (http://www.cisco.com/univercd/cc/td/doc/product/mels/dwdm/dwdm_fns.htm) Prof. Paul Lin

  16. Fiber Optics • Visible Light spectrum (04  m to 0.7 m) • Ultraviolet 400 nm • Violet 455 nm • Blue 490 nm • Green 550 nm • Yellow 580 nm • Orange 620 nm • Red 750 nm Prof. Paul Lin

  17. Fiber Optics • Fiber optics bands • 660 nm (LED source, plastics fiber) • 0.85 microns (850 nm) • 1.30 microns (1300 nm) • 1.55 microns (1550 nm) Prof. Paul Lin

  18. Fiber Optics • Fiber losses: absorption and scattering • Attenuation in decibles 10 log10 Pr/Pt Pr – received power Pt – transmitted power • Example 10 log10 2 = 3 dB Prof. Paul Lin

  19. Fiber Optics • Core • Glass: 7, 50, 62.5, 100 m • Plastics • Cladding • 125 m • Plastics buffer • DuPont Kevlar for strength • Outer jacket Prof. Paul Lin

  20. Fiber Optics • Types • Single mode fiber – 100 Gbps • Multimode fiber • Application Examples • Backbone cabling • Campus cabling • http://picturethis.pnl.gov/picturet.nsf/by+id/PNLM-3RKQS8?opendocument Prof. Paul Lin

  21. Fiber Optics • Connectors • Splicing • Terminator • Couplers • Attenuators • Mount enclosures Prof. Paul Lin

  22. Fiber Optics • Connectors • Subscriber channel (SC) connector (male/female) - TV • Straight-tip (ST) connector – connecting cable to networking devices • LC connector • FJ connector • MT-RJ – same size as RJ45 Prof. Paul Lin

  23. Web References • CommScope: http://www.commscope.com/html/home.shtml • Corning Cable Systems http://www.corningcablesystems.com/ • Heath Kit Fiber Optics System - http://www.heathkit.com/html/ews-543a.html • Performance data: http://www.hubbell-premise.com/Technical/TwistedPairComp.htm • Cat 5 RJ45 Connector – weatherproof connector: http://www.smartbridges.com/content/info/weatherproof_connector.html • Ethernet cable color code standards http://www.incentre.net/incentre/frame/ethernet.html Prof. Paul Lin

  24. Web References • ITS Project: Fiber Optics Basics http://www.tcomschool.ohiou.edu/its_pgs/fiber.html • Fiber Optics Systems http://floti.bell.ac.uk/MathsPhysics/fibreops.htm • Fiber Optic Assembly http://www.hubersuhnerinc.com/Products/FiberAssembly.htm • http://www.hubersuhnerinc.com/Products/FiberSystems.htm Prof. Paul Lin

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