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Structured Cabling Project

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Title: Structured Cabling Project


1
Structured Cabling Project
  • Shawn Shuoh-Ren Tsai
  • Cisco Academy Training Center
  • David Ta-Wei Shih
  • CGUIC

2
Safety Procedures
  • safety is the primary concern.
  • general safety precautions, while working with
    network building materials - both electrical and
    construction.

3
Network Documentation
  • engineering journal
  • logical topology
  • physical topology
  • cut sheets
  • problem-solving matrices
  • labeled outlets
  • labeled cable runs
  • summary of outlets and cable runs
  • summary of devices, MAC addresses, and IP
    addresses

4
Work Flow
  • installing outlets
  • installing jacks
  • running cables
  • punching cables into patch panels
  • testing cables
  • documenting cables

5
Work Flow (cont)
  • installing NICs
  • installing hubs, switches, bridges, and routers
  • configuring routers
  • installing and configuring PCs

6
TIA/EIA-568-A Standards
7
TIA/EIA-568-A specifies two types of wall mounts
  • the surface mount -- easier to install
  • screw-mounted box.
  • adhesive-backed box
  • the flush mount
  • drywall
  • Select a position for the jack that will be 30-45
    cm above the floor
  • plaster wall
  • crumbles easily
  • wood baseboard
  • avoid cutting the opening into the bottom 5 cm of
    the baseboard

8
Place Copper Wires into a Jack
  • A LANs performance is closely linked to the
    quality of its connections
  • the wiring sequence is critical to ensure the
    best possible network performance. Sequencing
    refers to the process of matching the wires of a
    cable to the proper terminals on the jack.
  • Try not to strip any more of the cable jacket
    than is necessary, approximately 2.5 cm.

9
Place Copper Wires into a Jack
10
Place Copper Wires into a Jack
11
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12
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13
Documenting Cable Runs
  • A cut sheet
  • is a rough diagram that shows the locations of
    the cable runs.
  • indicates the numbers of the classrooms, offices,
    or other rooms, to which the cables have been
    run.
  • to place corresponding numbers on all
    telecommunications outlets and at the patch panel
    in the wiring closet.

14
TIA/EIA-606 for Labeling Cables
  • Labeling
  • NO terms such as "Mr. Zimmerman's math class," or
    "Ms. Thome's art class".
  • incorporate room numbers in the label information
  • incorporate color coding
  • For example, a blue label might identify
    horizontal cabling at the wiring closet only,
    while a green label might identify cabling at the
    work area. 
  • mark the cable three times, approximately 60 cm
    apart
  • Allow enough cable for the ends to reach all the
    way to each jack location, plus enough excess or
    slack to reach the floor and extend another 60-90
    cm.
  • Do not cut the cables unless they have a label.

15
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16
mounting cables in raceway
  • decorative raceway
  • presents a more finished appearance
  • gutter raceway
  • a less attractive alternative to decorative
    raceway.
  • mounted with adhesive backing or with screws

17
SAFETY RULES
  • turn off power to all circuits that might pass
    through those work areas
  • Never, ever, touch power cables
  • learn the locations of all fire extinguishers in
    the area.
  • Long pants and sleeves help protect your arms and
    legs. Avoid wearing excessively loose or baggy
    clothing.

18
SAFETY RULES (cont)
  • protect your eyes with safety glasses
  • If you anticipate working in a dropped ceiling
    area, survey the area.
  • Follow building safety codes

19
Supporting Horizontal Cables
  • wall-mounted gutter
  • tie-wraps
  • ladder rack
  • Tools
  • A telepole
  • is nothing more than a telescoping pole with a
    hook at one end to hold the cable.
  • is used to string cable across a dropped ceiling
    or attic quickly.
  • fishing cable
  • When you pull cable up through a wall, you
    ordinarily work from an attic or dropped ceiling
    space

20
Wiring Closets
  • the equipment in a wiring closet includes
  • patch panels
  • wiring hubs
  • bridges
  • switches
  • routers

21
IDF and MDF
  • Patch Panel
  • Labels
  • Switch board
  • described by TIA/EIA-568-A as a horizontal
    cross-connect (HCC).
  • proper wire sequence is critical for best network
    performance
  • The wire and pin colors are not interchangeable
  • Punch tools

22
Network Operating Test
  • The baseline
  • is a record of your network's starting point or
    newly installed performance capabilities.
  • Continue to test your network on a regular basis
    in order to ensure that it performs at its peak
  • A cable tester is a hand held device that can
    certify that cable meets the required IEEE and
    TIA/EIA standards.

23
Cable Tester
  • determine cable distance
  • locate bad connections
  • provide wire maps for detecting crossed pairs
  • measure signal attenuation
  • measure near-end crosstalk 
  • detect split pairs 
  • perform noise level tests 
  • trace cable behind walls 

24
Cable Tester (Cont)
25
Wire Maps
  • Crossed Pairs
  • When wires are connected in reversed order, they
    are referred to as crossed pairs
  • Split Pairs

26
Cable Tester
  • Cable testers generally measure attenuation at
    several frequencies. Cable testers for CAT 5
    cable generally measure up to 100 MHz.

27
Near-end crosstalk
  • The most common cause is crossed pairs
  • twisted pairs that have become untwisted
  • cables that have been pulled too tightly
  • If you measure near-end crosstalk, you should do
    a visual check of the horizontal cabling, in
    order to rule out any of these possibilities. If
    you find nothing, then split pairs have most
    likely caused the problem
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