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Infrastructure and components. Cable. The cable and components used in structured cabling systems is defined in the standards EIA/TIA 568 x There are a number of different levels of cables and components known as Catagories ISO 11801

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cable
Cable
  • The cable and components used in structured cabling systems is defined in the standards
    • EIA/TIA 568 x
      • There are a number of different levels of cables and components known as Catagories
    • ISO 11801
      • There are a number of different levels of cables and components known as Classes
categories
Categories

Specified in TIA/EIA 568 X (i.e. In various 568 standards)

Cat 1: Previously used for POTS telephone communications, ISDN and doorbell wiring.

Cat 2: Previously was frequently used on 4 Mbit/s token ring networks.

Cat 3: used for data networks using frequencies up to 16 MHz. Historically popular for 10 Mbit/s Ethernet networks.

Cat 4: Provided performance of up to 20 MHz, and was frequently used on 16 Mbit/s token ring networks.

Cat 5: Provided performance of up to 100 MHz, and was frequently used on 100 Mbit/s Ethernet networks. May be unsuitable for 1000BASE-T gigabit ethernet.

Cat 5e: Provides performance of up to 100 MHz, and is frequently used for both 100 Mbit/s and Gigabit Ethernet networks.

Cat 6: Provides performance of up to 250 MHz, more than double category 5 and 5e.

Cat 6a: Provides performance of up to 500 MHz, double that of category 6. Suitable for 10GBase-T.

categories4
Categories
  • Cat 1: Currently unrecognized by TIA/EIA.
  • Cat 2: Currently unrecognized by TIA/EIA.
  • Cat 3: Currently defined in TIA/EIA-568-B.
  • Cat 4: Currently unrecognized by TIA/EIA.
  • Cat 5: Currently unrecognized by TIA/EIA.
  • Cat 5e: Currently defined in TIA/EIA-568-B.
  • Cat 6: Currently defined in TIA/EIA-568-B.
  • Cat 6a: Currently defined in ANSI/TIA/EIA-568-B.2-10.
category data networks history
Category & data networks history
  • CAT3
    • 10Mbit/s networks
  • CAT4
    • Developed for increased bit rates but was superseded by CAT5
  • CAT5
    • 100MHz bandwidth easily carried 100Mbits/s
  • CAT5e
    • Was developed because a badly installed CAT5 system could not carry Gigabit Ethernet
  • CAT6
    • Easily carries Gigabit ethernet, future proofs network
  • CAT6a
    • Designed to carry 10 Gigabit Ethernet
classes
Classes
  • Specified in ISO 11801
    • Class A: up to 100 kHz (category 1)
    • Class B: up to 1 MHz (category 2)
    • Class C: up to 16 MHz (category 3)
    • Class D: up to 100 MHz (category 5e)
    • Class E: up to 250 MHz (category 6)
    • Class F: up to 600 MHz (category 7)
twisted pair
Twisted pair
  • Two conductors are wound together to cancel out EMI
    • From external sources (entering cable)
    • From crosstalk (leaving cable)
  • The two wires typically carry equal and opposite signals (differential mode)
  • Noise on the pairs is mostly cancelled out
    • Each wire have similar amounts of EMI
    • EMI is 180 degrees out of phase with each other
  • Usually each pair has a different twist ratio
slide8
Primary Colours
    • White
    • Red
    • Black
    • Yellow
    • Violet
  • Secondary Colours
    • Blue
    • Orange
    • Green
    • Brown
    • Slate (grey)

25 pair cable

telecommunications outlet
Telecommunications outlet
  • Also known as a TO
  • Standard specifies RJ45 connector
  • Must be wired T568A or T568B
slide10
IDC
  • Insulation displacement connector
  • Connector that pierces the insulation on a wire to make the connection
  • Removes the need to strip the wire before connecting
  • Must be wired T568A or T568B
  • Cold Welds materials together ????

Comparing an IDC connection (LH) with a crimped connection (RH)

www.ami.ac.uk

telecommunications outlet 2
Telecommunications outlet 2
  • At least one should be
    • 4 Pair 100 OHM UTP
  • The other can be:
    • 4 Pair 100 OHM UTP OR
    • 2 Pair 150 OHM STP OR
    • 2 Strand, 62.5/125 multimode optical fibre
t568a and t568b pinouts

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

V

V

V

V

V

V

3

1

2

4

2

1

3

4

V

V

T568A and T568B pinouts

1 2 3 4 5 6 7 8

T568A

T568B

to clear any confusion
To clear any confusion
  • TIA-568-A and TIA-568-B are referring to the ANSI/EIA/TIA-568-A and ANSI/EIA/TIA-568-B wiring standards
  • T568A is a jack wiring pattern, one of the two in the standards; the other is T568B
  • T568A
    • Used in America
  • T568B
    • Used in Europe
cable types
Cable types
  • The standard recognises the following cable types
    • 4-pair 100 Ω unshielded twisted-pair (UTP) or screened twisted-pair (F/UTP)
    • 4-pair 100 Ω fully shielded twisted-pair (S/FTP) (ISO/IEC 11801:2002 only)
    • 2-fiber (duplex) 62.5/125µm or 50/125µm
      • 62.5/125µm USA standards
      • 50/125µm & 62.5/125µm European standards
      • Duplex SC connectors
    • Multi-unit cables are allowed,
      • Must satisfy the hybrid/bundled cable requirements of TIA/EIA-568-B.2, ISO/IEC 11801:2002
      • Under carpet cabling is no longer recognized by that standard ISO/IEC 11801:2002
work area
Work area
  • Work area equipment and cables covered by 568-B.1 and 11801:2002
  • Work area cables to be a maximum of 3m
  • Exception to the 3m length discussed later
  • 2 telecommunications outlets per work area minimum
  • Patch leads are the same Category as the cabling
work area ii
1st outlet

Must be a 4 pair twisted pair cable

Shielded

Unshielded

Category 6 is recommended

2nd outlet can be either

A 4 pair twisted pair cable

Shielded

Unshielded

A pair of multimode optical fibres

Work area II
slide18
Customer Premises Equipment
  • Equipment Cord
  • Patchcords/cross-connect jumpers, including equipment cables/cords, should not exceed 5m (16 ft.).Note: ISO/IEC 11801:2002 specifies a max. patchcord/ cross-connect length of 5m (16.4 ft.), which does not include equipment cables/cords.
  • Horizontal cable 90m (295 ft.) max. total
  • Transition point of consolidation point(optional)
  • Telecommunications outlet/connector (TO)
  • Work Area (WA) Equipment cord
other rules
Other Rules
  • Bridged taps and splices are not allowed
    • Fiber splices are allowed for fiber optic cables
  • Application specific components shall not be installed as part of the horizontal cabling
    • eg. splitters, baluns
  • Cabling shall be configured in a star topology
patch leads and equipment cords
Patch leads and equipment cords
  • Maximum combined length of 10m
    • Parts b,c & g
  • Maximum copper link length 100m
    • 90m + cords (10m)