premises cabling structures & telecommunication spaces.pdf

7/27/2019 Premises Cabling Structures & Telecommunication Spaces.pdf

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PREMISES CABLING STRUCTURESAND TELECOMMUNICATION SPACES

AMP NETCONNECT System Training


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26 May 2011page 2 /Information is Tyco Electronics Confidential & Proprietary

Premises Cabling Structures

Cabling Subsystems Campus Backbone Cabling Subsystem

Building Backbone Cabling Subsystems Horizontal Cabling Subsystems

The subsystems provide the means to configure different topologieslike bus star or ring.

TerminalEquipment

Campus

BackboneCabling

Subsystem

Building

BackboneCabling

Subsystem

HorizontalCablingSubsystem

WorkAreaCabling

Generic Cabling Subsystem

CD/MC BD/IC FD/HC CP TO


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Campus Backbone Subsystem

The campus backbone cabling subsystem extends from the campusdistributor to the building distributor(s), usually located in separate

buildings.

FD/HC

BD/IC

FD/HC

CD/MC


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Building Backbone Subsystem

A building backbone cabling subsystem extends from buildingdistributor(s) to the floor distributor(s).

FD/HC

FD/HC

BD/IC


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Campus & Building Backbone Cabling

The backbone cabling provides interconnection betweentelecommunication rooms, equipment rooms and entrance facilities. It

consists of: the backbone cables, building cross-connects campus cross-connects mechanical terminations and patch cords or jumpers used for backbone-to-

backbone cross-connection. This includes: Vertical connection between floors (risers)

Horizontal connection within the same floor Cables between an equipment room and building cable entrance facilities

Cables between buildings (campus backbone) Shall not contain consolidation points


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Horizontal Cabling Subsystem

The horizontal cabling is the cabling that connects the FD to the TO.


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Horizontal Cabling Subsystem

The horizontal cabling is the cabling that connects the FD to the TO.

T.O.Telecommunication Outlet

H.C.Horizontal Cabling

C.P.

Consolidation Point

Work Area Telecommunication Room

Floor Distributor


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Work Area (WA)

The WA is the space in a building where the occupants interact withtheir telecommunications devices. The WA cabling extends from the TO connector end of the horizontal

cabling system, to the terminal equipment.

CP MUTOA


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Work Area (WA) Cabling

A WA is usually approximately 10

square meters.

When planning a WA cabling :- 90m maximum horizontal cable length

is the assumption of 5m (maximum) of

WA cord.

When possible locate the TO no morethan 3m from equipments.

Patch cords should be factory

manufactured & commonly withidentical connectors on both ends.

Patch cords are constructed withstranded cable to provide flexibility.

Application-specific adapters (i.e.,baluns, modular adapters, etc.) shallbe install externally to the WA outlet.


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Telecommunication Outlets (TO) Placement

Requirements 2 TO ports per WA Marked with visible permanent label Should be located within 1m from a power outlet and installed at the

same height. For areas where it is difficult to add more TO at a later date, a

minimum of 2 separate outlets should be provided in the initial design.

WA

FD

1metre

Max.

Work Area 10m

Voice : Cat 3

Data : Cat 5e62.5/125 MM (Optional)

50/125 MM (Optional)


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Routing To Work Area

The TO serves as the cabling system WA interface Aesthetic considerations

Understand the structural composition of the WAs

Vertically drop down from ceiling Vertically up from an under floor system Path needs to route to TO

Provides storage for cable slack

Dressed the cable to the connection point without exceeding minimum bend

radius.


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Surface Mount Outlet Box

Raised/Access Floor Outlet Box MUTOA

Telecommunication Outlets (TO) Boxes

Wall Mount Outlet Box


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Multi-User Telecommunication Outlet


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Telecommunications Outlets (TO)

The drawing is one of the key

drawings in a design plan andshould include all of the components

(the respective manufacturer andpart number) required for the

installation and mounting of the TO.

TO shall not be more than 3 meterslong from the user equipment

Jacks installed shall match that ofthe installed horizontal cable.

Patch cords should be the same

category as the fixed cabling.

Optical fiber outlets shall be duplex

SC or SFF connectors such as MT-RJ or LC.

TO Elevation Drawing

Voice

Data AMP Cat 5e,P/N 406372-6Blue Color

AMP Cat 5e,P/N 406372-6Blue Color


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Telecommunications Outlet (TO)

Connectivity The installation and mounting of the outlet should include all the components (brand,

model and part number) required in the drawing. Designer should determine how the horizontal cables aesthetically pathway, i.e. directly

to the outlet box, through conduit (pipe), trunking, raceways, PVC casing etc.

SURFACE MOUNT RACEWAY & OUTLET DETAIL TYPICAL MODULAR FURNITURE SURFACE MOUNT DETAIL

Surface Mount Box

SIDE VIEW

Surface Mount Latching Duct

2x4 Hung Ceiling

Solid Wall

Plenum Area

Duck Slab

Stud/Clip TieWrap Assembly

Cat 5 & Cat 3 UTP

FRONT VIEWSurface Mount Outlet

Tie Wrap & AnchorCable Bundle

Hung Ceiling

Plenum AreaCat 5 UTP

Deck Slab

Stub/Clip Tie WrapAssembly

Use Latching Duct &Surface Box with grommeted

Faceplate only on solid wallsprovided Flush Mount Boxwith grommeted Faceplate

where ever possible

Use modular furniture communications

channel if available or drill & grommetaccess holes

Deck Slab


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Accommodation of Functional Elements

Accommodation of the functional elements and subsystems of ageneric cabling system is accomplished through pathways andspaces that include : Building Entrance Facilities

Telecommunications Room Equipment Room


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Telecommunications Room (TR)

A space that houses the

telecommunications cabling systemequipment. This includes :

Contains the telecommunicationsequipment,

cable terminations, and FD (cross-connect and/or

interconnect) for the horizontal andbackbone cabling system.

Each TR should have direct accessto the backbone cabling subsystemand contain the floor distributor.

If a TR serves more than one BD itshould be considered an ER.

Cable stress from tight bends, cable

ties, staples and tension should beavoided by well-designed cable

management.


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Telecommunication Room (TR)

A TR is an enclosed space that provide all the facilities (electricalpower, grounding and bonding, environmental control etc.) for passivecomponents, active devices and external network interfaces housedwithin it.


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TR Placement Consideration

Minimum of 1 FD per floor

The FD shall be located in a TR/TE

A single FD should not service morethan 1000 sq. meters (10,000 sq. ft.)

TR/TE placement depend: on the overall building layout and

construction size of room the customer is willing to

allow locations of the WAs being served.

TR/TE shall be located as close to

the centre of the area being served.

TR/TE shall only dedicated to thetelecommunications function andrelated support facilities.

Telecommunications room

(Floor Distributor)

Placement Requirements

1000 m 2


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May 26, 2011page 20 /Information is Tyco Electronics Confidential & Proprietary

TR Design Consideration

Clearance of 1.2m (4 ft) to all faces

where access is required.

Minimum of 0.15m (0.5 ft) awayfrom a wall where access is not

required.

Horizontal cable should typically

enters from one side and thebackbone cable entering from theopposite side.

Minimum of two dedicated electrical

distribution source on a separatecircuit.

10 x 73000 x 22005,000500

10 x 93000 x 28008,000800

10 x 113000 x 340010,0001000

ft2mm2ft2m2

Room sizeServing area

Telecommunications Room size

Front

Rear

Front

Rear

1.2m (4 ft)

1.2m (4 ft)0.15m (0.5 ft)

ElectricalEquipment


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Floor Distributor Connectivity Plan

Horizontal cabling termination can be wall, cabinet or rack mounted,or a combination of the two.

Install plenty of cable support and management panels to dress cableto the termination port.

Horizontal cable should enter from one side of the room andbackbone cable from the opposite side.


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Equipment Room


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Equipment Room (ER)

An ER is a large TR.

It is a geographical area that may contain the CDand/or BD and/or FD.

Some of the functions of a TR, BEF andCD may be combined with an ER so as

to share air conditioning, security, firecontrol, lighting and limited access.

The ER shall house only equipmentdirectly related to the telecommunicationssystem and its environmental supportsystems.


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ER Placement Considerations

Space required for the installation oflarge telecommunication equipment.

Accessibility for the delivery of largeequipment.

Locate within the allowablebackbone distance from the FDs ina multi-storey building.

Close to and with ready access tothe backbone pathway and centralto the area been serve.

Locate away from sources ofelectromagnetic interference (lessthan 3 V/m across the frequencyspectrum).

Floor loading capacity.

Locate in a clean, dry space and

provide floor drains.

Equipment RoomPlacement Requirements

HALLWAY(BD/CD)

ER

TR

(FD)

TR (FD)

TR

(FD)

EF

LIFT

SP


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ER Design Considerations

Design considerations are similar to

requirements for TR

In addition ER shall be sized to meet the known

and possible future requirements ofspecific equipment.

HVAC should maintain the sametemperature as the adjacent officearea 24x7.

Considerations should also coversacoustics and vibration of the roomenvironment.

Static electricity also needs to be

carefully considered. Site security is very sensitivity and

intrusion detection/access control mayhave to be provided.

Voltage supply tolerances, neutral-to-earth voltages and phase balancinginstallations are critical in the properoperation of sensitive electronic

equipment. Provide 0.07 sq. meters (0.75 sq. ft.)

of ER space for every 10 sq. meters(100 sq. ft.) of work area space. With aminimum design of 14 sq. meters (150sq. ft.).

1200111801 to 1,200

80074401 to 800

40047101 to 400

15014Up to 100

(ft2)(m2)

AREASWORK AREAS


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Rack Elevation Drawing

The designer should be aware of how many rack units (RU) will be taken up by thepatch panels and cable management to leave the appropriate space for the networkelectronics, and that the appropriate number of racks may be specified.

1 rack unit (RU) is equal to 1.73 inches (44.25 mm) or 3 cavity-mounting slots. There is no requirements on how rack is specified/arranged.


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Telecommunication Rack Planning

In a single rack implementation, specify the electronics down low andthe patch panels on top.

When more than one rack is needed, put the electronicson one rack and the patch panels on the other.

Keep the copper and fiber separated,

either different racks or put fiberpanels and devices on the top (easierto work with) and copper on thebottom.


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Building Entrance Facility (BEF)

The BEF consists of the telecommunications service entrance to the building, includingthe entrance through the building wall and continuing to the entrance room or space.

Required whenever campus backbone, public and private network cables (includingfrom antenna) enter buildings and a transition is made to internal cables.

BEF include the pathways for outside carrier services, campus backbone and antennaeentrance pathways.

BEF consist of a termination field interfacing any outside cabling to the buildingbackbone cabling.

Service Entrance Pathway Methods:

Tunnel Underground Direct Buried Aerial

Service Entrance Facility Service Entrance


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Entrance facilities inside buildings

EF shall be located in dry area not subject to flooding.

Entrance space shall be sized to meet known requirements of specific

protectors.

Cables which do not comply with IEC 60332-1, eg. jelly filled cables,can be brought into facility to 50 ft; over this length they shall be

completely enclosed in suitable non-combustible building materials.

Lightning, over-voltage protection, if fitted, shall be sited withinentrance facility.

EF should be located close to building entrance point, next toelectrical service room to reduce length of equi-potential bondingconductors to electrical earthing system.


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Distributed Network Architecture

Telecommunications rooms are

distributed through the building.

Advantages of DNA includes: Low backbone cable count Efficient use of cable routing space

Lower cabling investment Allow for fault tolerant design

Disadvantages of DNA includes: Moves, Adds and Changes (MAC) are

more complicated

Patching and un-patching Inefficient equipment ports utilization

Complexities in equipmentmaintenance, servicing and inventorytracking

Additional cost involved in providingcomplementing equipments (HVAC,fire-protection and UPS etc)


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Centralized Network Architecture

Provide direct connections form the workareas to the centrally located equipmentroom.

Is most suitable for users in a single-tenant building

Advantages of CNA includes: Moves, adds, and changes (MACs) are

typically easier Patching and un-patching Increase equipment ports utilisation

efficiency Ease of equipment maintenance and

manageability Lower administration time and costs are

lower, Floor space saving in Telecommunication

Rooms Quick upgrade path for network migration

Disadvantages of CNA includes: Higher initial installation cost (especially

fibre solution) Maximum twisted pair link distance of 90

metre Network Equipments centralisation

perceived as a single point of failure


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Floor Distributor

Telecommunication

sRoom

Single-User

Cable & Outlets

Splice or PullThru for CNA

Distributor/Cross connect and

Electronics forDNA

Horizontal Distribution Systems

Single-User Distribution Systems or Home Run Cabling


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Zone Distribution

Advantages of Zone cabling

includes: Reduced costs over life of cabling due

to less re-cabling (cabling from TC todistribution point stays permanent) Faster Moves, adds, and changes

(MACs) Less office disruption Less down-time and productivity loss

during MACs

Disadvantages of Zone cabling

includes: Initial installation costs

Perceived lower performance due toadditional connection point

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