CH3 SVmix_Part3

Chapter 3, Part 3


CH3 SVmix_Part3

By S V
Created 3 years ago

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Chapter 3, Part 3
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Slide Content
  1. What’s Involved in Installing Wiring Distributions

    Slide 1 - What’s Involved in Installing Wiring Distributions

    • Many components involved in wiring a computer network
    • There are standards – for “Structured Cabling”, which specify how some of the components are laid out
    • Cables and connectors
    • Cross-connects (see next slide)
    • Patch panels (see slide later)
    • Jacks
    • Devices that connectors connect to
    • Both Horizontal Cabling and Vertical Cabling (see next slide)
  2. Vertical and Horizontal Cross-Connects

    Slide 2 - Vertical and Horizontal Cross-Connects

    • Cross-connect is a location within a cabling system where all wires come together
    • Cables that run from communications closets to wall outlets are horizontal connect cables
    • Patch cable is any cable that has a connector on both ends and is used to connect a network device to a network device, a wall jack to a network device, or a network device to a patch panel
    • Vertical connect cables are backbone cables that connect equipment rooms, telecommunications rooms, and other physical termination points
  3. Patch Panels

    Slide 3 - Patch Panels

    • Rack or wall-mounted structures that house cable connections
    • Types of patch panels
    • 66 block
    • 110 block
    • Demarc/demarc extension
    • Smart jack
    • Front of patch panel
    • Back of patch panel
  4. What are 66 Block and 110 Block?

    Slide 4 - What are 66 Block and 110 Block?

    • Both are “punch-down” blocks used to connect wires to other connectionsHowever, 66 block is older and considered legacy
    • Unsuited for network communications speeds faster than 10 mbps
    • 25 pair – used primarily to connect telephone wires
    • 110 block is newer
    • Used for computer network connections
    • One side has RJ-11 jacks (for phone connections) or RJ-45 jacks (for network connections)
  5. MDF and IDF – the equipment rooms

    Slide 5 - MDF and IDF – the equipment rooms

    • Main distribution frame (MDF)
    • The location in the customer building where the carrier line (Verizon, AT&T, BrightHouse, etc.) comes into the customer premises and is converted to the customer LAN network
    • Installed in building as part of prewiring process
    • Often contain the “Demarc” Point (see next slide)
    • Intermediate distribution frame (IDF)
    • Located in an equipment or telecommunications room
    • Connected to MDF by a backbone cable
    • The carrier sends its WAN signal to the MDF
  6. Demarc/Demarc Extension

    Slide 6 - Demarc/Demarc Extension

    • Demarc (demarcation point) is last point of responsibility of the service provider
    • Is often at the MDF in a large building
    • Demarc extension is length of copper or fiber that begins after the demarc but does not reach all the way up to your office
    • Most often used when the external service enters your building somewhere other than the MDF
    • The “NID” (Smart Jack) often servers as the Demarc point – next slide
  7. Smart Jack (or Network Interface Device)

    Slide 7 - Smart Jack (or Network Interface Device)

    • Also called a Network Interface Device (NID)
    • Owned by the Public Switched Telephone Network (PSTN) or carrier
    • Serves as the demarcation point between the carrier (Verizon, AT&T, etc.) and the customer’s computer network
    • Service provider may install a NID that has power and can be looped for testing purposes
  8. Verifying Correct Wiring Installation

    Slide 8 - Verifying Correct Wiring Installation

    • What can go wrong?
    • Copper cables placed too close to a magnetic source
    • Cable jackets ripped off when pulling cable
    • Cables cut wrong and extended beyond the maximum length for their type
    • Fiber-optic cables handled roughly or poorly installed
    • Test, test, and test again
    • Wiring Best Practices
    • Install more cables than necessary
    • If a cable goes bad in the future, an extra cable can take the place of the bad cable
    • Keep detailed records
  9. Verifying Proper Wiring Termination

    Slide 9 - Verifying Proper Wiring Termination

    • Inspect the installation
    • Verify that all wires are terminated properly in the right order
    • Fiber-optic termination requires specialized and expensive equipment and training
    • Terminate new connections using the appropriate tools
  10. The last Media We Discuss - Wireless Media

    Slide 10 - The last Media We Discuss - Wireless Media

    • Defined by the 802.11 standards
    • 802.11a
    • 802.11b
    • 802.11g
    • 802.11n
    • 802.11ac is the new one
  11. IEEE 802.11

    Slide 11 - IEEE 802.11

    • Most prominent standard for wireless LANs
    • The standards within 802.11n address:
    • Distance
    • Speed
    • Latency
    • Frequency
    • Channels
    • Channel Bonding
    • MIMO
  12. 802.11a

    Slide 12 - 802.11a

    • Theoretical maximum throughput is 54 mbps; realistically more like 22 mbps
    • Maximum indoor distance is ~50 feet or 15 meters
    • Maximum outdoor distance is ~100 feet or 30 meters
    • Uses the 5 GHz radio frequency range
    • 8 non-overlapping channels
    • 802.11b
    • Theoretical throughput of up to 11 mbps; realistically more like 2.5 mbps
    • Maximum indoor range or distance is ~150 feet or 45 meters
    • Maximum outdoor range is ~300 feet or 90 meters
    • Uses the 2.4 GHz radio frequency range
    • 3 non-overlapping channels: 1, 6, and 11
  13. 802.11g

    Slide 13 - 802.11g

    • Uses the same frequency range and same channels as 802.11b
    • Has same distance capabilities as 802.11b
    • Theoretical throughput is 54 mbps; realistic throughput is ~22 mbps
    • Fully backwards compatible with 802.11b
    • Uses 5 GHz and 2.4 GHz frequency ranges
    • Theoretical throughput is 300 to 600 mbps; realistically between 100 and 200 mbps
    • Maximum indoor distance is ~229 feet or 70 meters
    • Maximum outdoor distance is 820 feet or 250 meters
    • Uses channel bonding, where two or more adjacent channels are linked together
  14. Tying It All Together

    Slide 14 - Tying It All Together

    • Important to know what types of media connect to specific devices and in which order
    • Connecting the wrong type of media to a device, or connecting media in the wrong place, prevents network communication
  15. Summary

    Slide 15 - Summary

    • Ethernet cable types are denoted by N<Signaling>–X.
    • Common cabling is shielded twisted-pair (STP) or unshielded twisted-pair (UTP).
    • Common grades of twisted-pair wires used in LANs are CAT 5, CAT 5e, and CAT 6
    • Some cabling is susceptible to EMI and interference.
    • Fiber-optic cabling transmits digital signals using light impulses and is immune to EMI and RFI.
  16. Summary (Continued)

    Slide 16 - Summary (Continued)

    • Fiber-optic cabling is single-mode fiber (SMF) or multimode fiber (MMF).
    • Patch panels are rack- or wall-mounted structures that house cable connections.
    • Types of patch panels include 66 block, 110 block, demarc/demarc extension, and smart jack.
    • Wireless standards are 802.11a, 802.11b, 802.11g, and 802.11n (new one is 802.11ac)
  17. Self-Assessment

    Slide 17 - Self-Assessment

    • What does an Ethernet standard of 1000Base-F mean?
    • What are the 2 types of twisted pair cables?
    • Which is the most modern category of unshielded twisted pair?
    • What are the some of the issues with using copper wire?
    • What are some of the pros and cons of using fiber optic cable?
    • What are MIMO and bonding and how do they relate to wireless transmissions?
    • What is an MDF and an IDF?
    • What are patch panels?
    • What is the difference between horizontal and vertical cabling?
    • Which type of media is immune to electromagnetic interference?