Structured cabling

An Introduction To Structured Cabling

Cabling is a Strategic Asset Information technology is at the heart of today's successful business operations. Efficient integration of all key areas, from research and development through customer service, is critically important. The many and varied business functions, each with their own unique requirements, are dependant on a common technology foundation: CABLING

What does ‘Structured Cabling’ mean? Cabling system that allows constant moves and changes to be performed by on site personnel. Growth and flexibility built in to the cabling scheme. Can be proprietary (closed) or non-proprietary (open).

Network Investment A cabling system supports and outlives most network components, yet represents only 5% of the total network investment

Facilitates Moving Employees Within A Building Moves, adds and changes are inevitable: 40% of employees move within their building every year. These activities can cause serious work-flow disruptions with an unstructured cabling system. A structured cabling system allows moves, adds and changes to occur quickly and cost effectively.

Cost Of Downtime Network downtime costs between $ 1,000 and $ 50,000 an hour. Preventing downtime with the use of a structured cabling system can save substantial amounts of money .

Cabling System-Related Problems The average network crashes 20 times per year, 70% of the time due to inferior cabling

Structured Versus Conventional Cabling Costs

Closed or Open Closed systems are proprietary to a particular vendor and / or system. Open systems give greater flexibility by being applications and vendor independent.

Open System Architecture Why Open ? Facility o run any voice, data or video service over the same cables. On site personnel can perform their own shifts and changes, thus reducing the cost of ownership. Protection of investment.

Megabits versus Megahertz 1 Hz 100 MHz CAT 5 (100 MHz) Voice CAT 3 (16 MHz) CAT 4 (20 MHz) 100 Base T TP-PMD ATM (31.25 MHz)

Applicable Standards ANSI/TIA/EIA-568A Commercial Building Wiring standard which specifies the requirements for category 3, 4 and 5 cabling. ANSI/TIA/EIA-569 The standard covering pathways and spaces for commercial building wiring. ANSI/TIA/EIA-606 The standard covering administration and labelling of commercial building wiring. ISO/IEC/IS-11801 International standard covering all of the above

Definitions Backbone a link (fibre or cable) between telecommunications closets, and equipment rooms within or between buildings. Horizontal Cabling the wiring between the telecommunications outlet and the horizontal cross connect. Horizontal Cross Connect a connection point between the backbone cabling and the horizontal cabling. Intermediate Cross Connect (IC) a connection point between 1st and 2nd level backbone cabling. Main Cross Connect (MC) a connection point between 1st level backbone and entrance equipment cables. Outlet Connector (TO) the socket into which you plug your telephone Telecommunications Closet (TC) an enclosed space for housing telecommunications equipment and cables. Work Area any occupied building space requiring telecommunications equipment.

Backbone & Horizontal Cabling Telecoms Closet Main Cross Connect Telecoms Closet Telecoms Closet Horizontal Cable Horizontal Cable Horizontal Cable Backbone Cable

Backbone Cable A properly designed cabling system will have no more than two levels of backbone. MC TC TC IC “ A” 1st Level Backbone “ C” 2nd Level Backbone “ B” 1st Level Backbone

Recognised Media & Maximum Distances

Horizontal Cable ANSI/TIA/EIA-568A Wiring Standard Guidelines Horizontal Cross Connect Backbone From MC or IC Telecommunications Closet 6m Patchcord Telecom Outlet Work Station 3m Patchcord Max 90 m

ANSI/TIA/EIA-568A MC IC TC TC TC IMO IMO Horizontal Cable First Level Backbone Second Level Backbone

ISO/IEC/IS-11801 Campus Distributor Building Distributor Floor Distributor Floor Distributor Floor Distributor TO TO Horizontal Cable First Level Backbone Second Level Backbone Transition Point

Installed Environment Interbuilding Backbone Intrabuilding Backbone

Outlet Provision Each work area should have a MINIMUM of 2 outlets. A work area should be assumed to be approximately 10 square metres.

Cable Preparation Pull cables through the appropriate openings in the faceplate and mount the faceplate to the electrical box with the screws provided.

Cable Preparation Strip back as much of the cable jacket as needed to terminate the cable.

Cable Preparation Fan out the pairs according to the colour code label on the clear termination cap.

Cable Preparation Push the cable forward until the cable jacket is adjacent to the cap.

Cable Preparation Lace the individual wires into the proper locations according to the colour code label. For CAT 5, tip wires (white) should be to the left side of each pair.

Cable Preparation Cable pairs MUST be laced into the termination cap as shown above for proper termination and transmission performance.

Cable Preparation Trim the excess wires as shown.

Cable Preparation Align the key and alignment ribs on the termination cap with the corresponding slots in the MAX module.

Cable Preparation Press the termination cap until it snaplocks into place on the MAX module. If necessary, squeeze gently with pliers.

Cable Preparation If re-termination is required, unlatch the termination cap at the screwdriver slots. Pull the cap straight off to remove the wires from the terminations.

Module Installation Slide the MAX module into the proper location of the face plate.

Module Installation Align the top of the module into the faceplate. Angle the module downward. Snap into place.

Module Installation Insert the colour icons provided by sliding them into place from the side.

Module Installation To install the protective rubber doors, slide the bottom of the door into the slot below the outlet opening.

Module Installation Bend the door downwards. Press firmly into the slot.

Module Installation Press the door into the jack opening. The door will close easily when pressed.

Module Installation Label the faceplate above and below the MAX module using the paper tabs and plastic covers provided.

Module Removal First remove the protective rubber door by opening the door and then pulling the door outward

Module Removal Insert a modular cord and push down on the icon area of the module.

Module Removal Using the modular cord, rotate the MAX module upward and then pull out from the face plate.

Structured cabling

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Editor's Notes