structured cabling stud
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SCS 3004SCS 3004Structured Cabling SystemStructured Cabling System
Dr. Ajantha AtukoraleUCSC
Thanks to: Dexter de LimaNetwork Systems Engineer
Enterprise Technology (Pvt) Ltd.
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Cabling SystemsCabling Systems
Proprietary Cabling System:
Has specific design parameters and is dependent onnetwork technology and/or vendor equipment which
requires specific connectors and cable
Structured Cabling System:
Has universal cabling design which will support all LAN
protocols and traditional telephony
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Structured Cabling SystemStructured Cabling System
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Telephone System Cable PlantTelephone System Cable Plant
X
Main Distribution
Frame (MDF)
Primary Cable
Cross Connection
Cabinet (CCC)
Secondary Cable
Distribution Point
(DP)
Telephone
To other
CCCs
To other
DPs
Exchange
Trunk Lines
to other
Exchanges
Drop Wire
To otherTelephones
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SCSSCS--Ethernet ApplicationEthernet Application
Patch Panel
Horizontal Cable
Information Outlet
Network Closet
Ethernet Switch
Patch cord
Fly CordPC
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SCSSCS Voice ApplicationVoice Application
Information Outlet
Network Closet
PBX
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SCSSCS RSRS--232 Application232 Application
Horizontal Cable
Serial (RS-232) to UTP Adaptor
Mini Computer
Terminal
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Benefits of a Structured CablingBenefits of a Structured Cabling
Structured Cabling makes it easy to add, move, change and
re-site individual employees or complete department's
communications equipment.
Support data and traditional voice; no need for multiple
cabling systems in a building
No downtime when reconnecting equipment Multiple conventional cable plants are expensive to maintain
and upgrade compared to a Structured Cabling System
Independent of protocols and networking technologies Covers current & future requirements
Allows total flexibility
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Structured Cable System DesignStructured Cable System Design
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Design ConceptDesign Concept HORIZONTAL CABLINGHorizontal Cabling is the sub-section of
the cabling system from the workstationoutlet to the FD/IDF.
BACKBONEBackbone cabling provides the main feeder cable in
a system. It can be either 'vertical style' in which it
runs vertically between floors in a building,
connecting FD/IDF's to the BD, or 'campus style' in
which it connects several BD's in separate buildings
in one centralized location.
FLOOR DISTRIBUTOR (FD) OR
INTERMEDIATE DISTRIBUTION FRAME
(IDF)The FD/IDF accommodates all of the cross connect
facilities to interconnect work stations to active LAN
equipment (also located in the FD/IDF enclosure),and backbone cabling to centralized processing
equipment installed elsewhere.
BUILDING DISTRIBUTOR (BD) OR MAIN
DISTRIBUTION FRAME (MDF)
The BD, provides a means of centralized processingand switching systems to the vertical backbone cabling.
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Building Cable SystemBuilding Cable System
HORIZONTAL CABLINGHorizontal Cabling begins where the user plugs a terminal in and ends at
a centrally located point called a Floor Distributor (FD) or Intermediate
Distribution Frame (IDF). Distribution Frames should be located so that
horizontal UTP cable length is limited to 90 meter or less to provide
compatibility with high-speed LAN operation. When horizontal cabling is
properly designed, each office interface is accessible from an appropriate
distribution frame. The cable run should be free of bridges, taps and
splices.
FLOOR DISTRIBUTOR OR INTERMEDIATE
DISTRIBUTION FRAMEEach distribution frame should be located so that the
horizontal cabling length for UTP is limited to 90 meter
to ensure compatibility with high-speed LAN operation.
Sufficient cable management is critical for long termmaintainability.
BUILDING DISTRIBUTOR (BD) OR
MAIN DISTRIBUTION FRAME (MDF)The BD/MDF provides a means of cross-connecting horizontal
channels to equipment ports or trunk channels. The ports of each
piece of system equipment need to be converted to the cross
connect products mounted in the distribution frame. System
Connections, Voice and LAN can be incorporated into the BD/MDF.
BACKBONEBackbone cabling is the main trunk cable from which all
connections are made. Backbone cabling can be either
campus style, in which it connects several buildings, or
it can be run vertically between floors to connect several
FD/IDF or the BD/MDF. Molex Premise Networks
recommends the use of Optical Fiber cable, although
twisted pair, or a combination of both, is acceptable.
Applications include baseband LAN, broadband LANand multiplexed channels.
UTP
UTP
Fiber
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Elements of Structured CablingElements of Structured CablingSystemSystem
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WHY PEOPLE NEED STRUCTURED CABLING
UTPCAT 3
CAT 5
CAT 5e
UTPCAT 6
CAT 6e
CAT 7
STPCAT 5
CAT 5e
CAT 6/7
UTP CablesUTP Cables
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Available inAvailable in
configurationsconfigurations
from 24 to 96 portfrom 24 to 96 port
Large labelingLarge labeling
areas for panelareas for panelidentificationidentification
Eight moduleEight module
harmonicas snap in forharmonicas snap in for
easy servicingeasy servicing
UTP Patch PanelUTP Patch Panel
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WHY PEOPLE NEED STRUCTURED CABLING
Available in configurationsAvailable in configurations
from 1 to 6 port UK, US, Europe, Flashfrom 1 to 6 port UK, US, Europe, Flash
and Surface mount Type wall outletsand Surface mount Type wall outlets
UTP Wall OutletUTP Wall Outlet
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WHY PEOPLE NEED STRUCTURED CABLING
Available in configurationsAvailable in configurations
from 0.5m to 6m and long reachfrom 0.5m to 6m and long reach
once from 6m to 15 monce from 6m to 15 m
Adaptors for all typeAdaptors for all type
of applicationsof applications
UTP Patch Cord & AdaptorsUTP Patch Cord & Adaptors
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Ring runs & CoversRing runs & Covers Cable organizer panels and ringsCable organizer panels and ringsStrain relief panelsStrain relief panels
Cable Management PanelCable Management Panel
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ToolsTools
Cable TesterRound Wire &
Cable CutterCrimping tool -Without Ratchet
Crimping tool -
With Ratchet
Punch Down Tool Cable & Wire Stripper
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Structured Cabling SystemStructured Cabling SystemStandards & TerminologyStandards & Terminology
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Standard OrganizationsStandard Organizations
IEEE Institution of Electrical and Electronic Engineers
ISO International Standards Organization
ANSI/EIA/TIA American National Standards Institute /
Electrical Industries Association/Telecommunication
Industries Association
Consortium of manufacturers, vendors, users and other
interested parties responsible for the family of standardsassociated with design, installation and use of structured Cabling
Systems.
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IEEE StandardsIEEE Standards
DistanceMediaData Rate
550 m
5 km
50 m MM Fiber
9/10 m SM Fiber
1000 Mbps1000 Base-LX
550 m
10 km
62.5/50 m MM Fiber
9/10 m SM Fiber
1000 Mbps1000 Base-LH
1000 Mbps
1000 Mbps
1000 Mbps
100 Mbps
100 Mbps
10 Mbps
10 Mbps
10 Mbps
70 km
100 km
9/10 m SM Fiber
Dispersion Shifted Fiber
1000 Base-ZX
220 m
550 m
62.5 m MM Fiber
50 m MM Fiber
1000 Base-SX
100 mCopper UTP1000 Base-TX
2 km
10 km
62.5/50 m MM Fiber
9/10 m SM Fiber
100 Base-FX
100 mCopper UTP100 Base-TX
100 mCopper UTP10 Base-T
500 mCopper Coaxial10 Base-5
200 mCopper Coaxial10 Base-2
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ISO/IEC 11801ISO/IEC 11801
International Standards Organization
ISO/IEC 11801 : IT- Cabling for customer premise ISO/IEC 14763-1 : Administration, documentation, records
ISO/IEC 14763-2 : Planning and Installation practices
ISO/IEC 14763-3 : Testing of optical fiber cabling IEC 61935-1 : Testing of copper cabling
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ANSI/TIA/EIAANSI/TIA/EIA
American National Standards Institute / Telecommunications Industry Association / ElectronicIndustries Association
ANSI/TIA/EIA 568ANSI/TIA/EIA 568--B SeriesB Series
ANSI/TIA/EIA 568-B.1 Commercial Building Telecommunications Cabling Standard
ANSI/TIA/EIA 568-B.2 100 Ohm Twisted Pair Cabling Standard
ANSI/TIA/EIA 568-B.3 Optical Fiber Standards
Also incorporates & refines
TIA/EIA TSB67 - - Performance Specification for field testing UTP.
TIA/EIA TSB72 - Centralized Optical Fiber Cabling Guidelines
TIA/EIA TSB75 Open Office Guidelines ANSI/TIA/EIA-568-A-1 - Delay & Delay Skew
ANSI/TIA/EIA-568-A-2 - Misc. changes
ANSI/TIA/EIA-568-A-3 - Hybrid and Bundled Cables
ANSI/TIA/EIA-568-A-4 - Patch Cords
ANSI/TIA/EIA-568-A-5 - Category 5e
TIA/EIA/IS-729 Technical Specifications for 100 Ohm Screened Twisted-PairCabling
ANSI/TIA/EIA 569-A - Commercial Building Standard for Telecommunication Pathways andSpaces.
ANSI/ TIA/EIA 570-A - Residential and Light Commercial Telecommunication WiringStandard.
ANSI/TIA/EIA 606 - 1993 Administration of Telecommunication Infrastructure ofCommercial Buildings.
ANSI/TIA/EIA 607 - 1994 Grounding and Bonding.
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Recommended LengthsRecommended Lengths
A + C = 10m (combined)
B = 90m (Permanent Link) D = 100m (Channel Link)
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UTP Color CodingUTP Color Coding
To distinguish between pairs, they are colored
each pair has designated Tip and Ring
conductors. Pair 1 can therefore be designated
T1 and R1. Both UTP & STP conform to this
standard
T1 - White Blue/Blue White - R1
T2 - White Orange/Orange White - R2
T3 - White Green/Green White - R3
T4 - White Brown/Brown White - R4
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Wiring SequencesWiring Sequences
568A
International ISDN standard
Pairs 2 & 3 are transposedfrom 568B.
Pairs 1 & 2 USOC compatible
568B
Most widely specified
sequence. Also Known as258A
Same as 568A but pairs 2 & 3
are transposed
11 22 33 44 55 66 77 88
T3T3 R3R3 T2T2 R2R2 T4T4 R4R4R1R1 T1T1
11 22 33 44 55 66 77 88
T2T2 R2R2 T3T3 R3R3 T4T4 R4R4R1R1 T1T1
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Wiring SequencesWiring Sequences
These are the pin-out diagramsfor straight through andcrossover UTP Ethernet cables.
The TX (transmitter) pins areconnected to corresponding RX(receiver) pins, with plus toplus and minus to minus. A
coss-over cable must be usedto connect units with identicalinterfaces.When straight-through cablesare used to connect Ethernetdevices, one of the two unitsmust, in effect, perform thecross-over function.
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Wiring Sequences (100 Base TX Duplex)Wiring Sequences (100 Base TX Duplex)
NoteNote: Only pairs 22 and 33 are used for
Standard Ethernet wiring. Pairs 11 and
44 can be used for other purposes
such as telephones or even a secondseparate, complete Ethernet
connection.
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Unshielded Twisted PairUnshielded Twisted PairInstallation PracticesInstallation Practices
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Types of PathwaysTypes of Pathways
Conduit Used in environments where required by code or maximum protection of
the cable is desired or required. Typically constructed of one of the
following: Rigid metal conduit
Rigid PVC
Flexible
Under Floor Under floor duct is either sealed in slab floor or in fill placed on top of
slab (This added thickness to floor).
Cellular floor requires distribution cells located on lower level of system.Provides service to workstations. Separated by power andcommunication.
Raised floor consists of steel footings holding pedestals which supportthe raised floor.
Suspended Ceiling Most common and cost effective pathway for running cable.
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Cable TrayCable Tray
Start Laying cables to the side of the tray.
Separate fiber from copper Tie Fiber to underside
of tray if practical
ff
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Installing in ConduitInstalling in Conduit
Conduit comes in several types and sizes including rigid metal, PVCand fiberglass conduit, or flexible PVC conduit.
Using flexible conduit of extended length because it has potential forabrasion damage to cable jacketing. Can be used for short lengths.
Use conduit in environments where the cable needs protection fromincidental damage, visual exposure is a consideration, access byunauthorized individuals is possible or building/safety codes requireit.
Maximum continuous straight length, (without access), should notexceed 30 meter.
No more than two 90, 180 total bends between each pull box. (Athird bend is allowed if the run is less than 10 meter
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Bend Radii of CablesBend Radii of Cables
4 Pair twisted pair cable
minimum bend radius is 4 times the diameter of the cable
Multi-pair twisted pair cable
minimum bend radius is 10 times the diameter of the cable
Optical Fiber cable
minimum bend radius is 10 times the diameter of the cable Consult with cable manufacturers & comply with their specifications
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Under floorUnder floor
Under floor duct is either sealed in slab floor or in fill
placed on top of slab (This added thickness to floor).
Cellular floor requires distribution cells located on
lower level of system. Provides service to
workstations. Separated by power andcommunication.
Raised floor consists of steel footings holding
pedestals which support the raised floor.
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Suspended CeilingSuspended Ceiling
Most common and cost effective pathway for
running cable.
Cable must be supported on 1.2 to 1.5 m
(4 to 5 feet) centers.
DO NOT USE CEILING SUPPORT SYSTEM. Max 24 -32 cables per catenary strand.
Quantities of forty eight (48) or more, four pair
cables need to be supported in heavier cable trays.
l k th diff
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