Attachment 1i TIA-568 Telecomm Cabling Standard.pdf

TIA-568.0-E

(Revision of TIA-568.0-D)

March 2020

Generic Telecommunications Cabling for Customer Premises

ANSI/TIA-568.0-E-2020

APPROVED: MARCH 24, 2020

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ANSI/TIA-568.0-E

i

Generic Telecommunications Cabling for Customer Premises

Table of Contents FOREWORD ............................................................................................................................. v

1 SCOPE

2 NORMATIVE REFERENCES

3 DEFINITIONS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE

3.1 General

3.2 Definitions

3.3 Acronyms and abbreviations

3.4 Units of measure

4 ENVIRONMENTAL COMPATIBILITY

5 TELECOMMUNICATIONS CABLING SYSTEM STRUCTURE

5.1 General

5.2 Topology

5.2.1 General

5.2.2 Accommodation of non-star configurations

5.3 Equipment outlets

5.4 Distributors

5.5 Cabling Subsystem 1

5.6 Cabling Subsystem 2 and Cabling Subsystem 3

5.7 Optional tie cabling

5.8 Recognized cabling

5.9 Open space cabling

5.9.1 Multi-user telecommunications outlet assembly

5.9.1.1 Design considerations

5.9.1.2 Installation practices

5.9.1.3 Administration

5.9.1.4 Maximum cord lengths

5.9.1.4.1 Balanced twisted-pair cabling

5.9.1.4.2 Optical fiber cabling

5.9.2 Consolidation point

5.9.2.1 Design considerations

5.9.2.2 Installation practices

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5.9.3 Horizontal connection point

5.9.3.1 General

5.9.3.2 Location

5.10 Cabling lengths

5.10.1 General

5.10.2 Balanced twisted-pair cabling

5.10.2.1 General

5.10.2.2 100 m channel

5.10.3 Demarcation point

6 CABLING INSTALLATION REQUIREMENTS

6.1 General

6.2 Balanced twisted-pair cabling

6.2.1 Maximum pulling tension

6.2.2 Minimum inside bend radius

6.2.2.1 Cable

6.2.2.2 Cord cable

6.2.3 Cable termination

6.2.3.1 General

6.2.3.2 Eight-position modular jack pin-pair assignments

6.2.4 Cords and jumpers

6.2.5 Telecommunications bonding requirements for screened cabling

6.2.6 Separation of power and telecommunications cables

6.2.7 Electrostatic discharge

6.2.8 Guidelines for supporting power delivery over balanced twisted-pair cabling

6.3 Optical fiber cabling

6.3.1 Minimum inside bend radius and maximum pulling tension

6.3.2 Cords

6.3.3 Polarity

6.4 Broadband coaxial cabling

6.4.1 Bend radius

6.4.2 Pull tension

6.4.3 F-type mating torque

6.4.4 Termination of unused ports and cables

6.4.5 Other installation guidelines

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7 CABLING TRANSMISSION PERFORMANCE AND TEST REQUIREMENTS

7.1 General

7.2 Field-test instrument calibration

7.3 Balanced twisted-pair cabling transmission performance and test requirements

7.4 Optical fiber cabling transmission performance and test requirements

7.5 Broadband coaxial cabling transmission performance and test requirements

8 GROUNDING AND BONDING

9 PATHWAYS AND SPACES

10 FIRESTOPPING

11 ADMINISTRATION

12 CABLING FOR WIRELESS ACCESS POINTS

13 PHYSICAL NETWORK SECURITY

Annex A (normative) Centralized optical fiber cabling

A.1 General

A.2 Implementation

Annex B (informative) Multi-tenant Cabling Subsystem 2 and Cabling Subsystem 3

Annex C (informative) Application support information

C.1 General

C.2 Balanced twisted-pair cabling supportable distances

C.3 Optical fiber cabling supportable distances

C.4 Broadband coaxial cabling supportable distances

Annex D (informative) Environmental classifications

Annex E (informative) Guidelines on shared sheaths and shared pathways for balanced twisted-pair cabling

E.1 General

E.2 Multiple applications operating under the same cable sheath

E.2.1 General

E.2.2 Guidelines for shared-sheath implementations

E.3 Multiple applications operating over different cabling categories or constructions

E.4 Category 6A UTP cables from different manufacturers

E.5 Category 6A UTP cables and other category cables

Annex F (informative) Bibliography

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List of Figures Figure 1 – Relationship between relevant TIA standards .......................................................... vii Figure 2 – Functional elements that comprise a generic cabling system

Figure 3 – Examples of interconnections and cross-connections for Distributor A

Figure 4 – Examples of Cabling Subsystem 1 cabling

Figure 5 – Example of the use of a MUTOA

Figure 6 – Example of the use of a consolidation point

Figure 7 – Front view of eight position jack pin-pair assignments (T568A)

Figure 8 – Front view of eight-position jack pin-pair assignment (T568B)

Figure 9 – Illustration of centralized optical fiber cabling

Figure 10 – Example of adjacent bundles of category 6A cables from different manufacturers .48

Figure 11 – Example bundle configuration with seven category 6 cables around one category 6A cable

List of Tables

Table 1 – Maximum cord and link length, 100 m 4-pair channel

Table 2 – Maximum pair un-twist for category cable termination

Table 3 – Maximum tensile load and minimum inside bend radius

Table 4 – Maximum pull tension for coaxial cable

Table 5 – Maximum supportable distances for balanced twisted-pair cabling applications

Table 6 – Maximum supportable distances and channel attenuation for multimode optical fiber applications

Table 7 – Maximum supportable distances and channel attenuation for single-mode optical fiber applications

Table 8 – Maximum supportable distances and minimum and maximum channel attenuation for single-mode fiber passive optical network (PON) applications

Table 9 – Maximum supportable distances for broadband coaxial cabling applications

Table 10 – MICE environmental conditions

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FOREWORD

(This foreword is not considered part of this Standard.)

This Standard was developed by TIA Subcommittee TR-42.1.

Approval of this Standard This Standard was approved by TIA Subcommittee TR-42.1, TIA Engineering Committee TR-42, and the American National Standards Institute (ANSI).

ANSI/TIA reviews standards every 5 years. At that time, standards are reaffirmed, withdrawn, or revised according to the submitted updates. Updates to be included in the next revision should be sent to the committee chair or to ANSI/TIA.

Contributing organizations More than 60 organizations within the telecommunications industry (including manufacturers, consultants, end users, and other organizations) contributed their expertise to the development of this Standard.

Documents superseded This Standard, in part, replaces ANSI/TIA-568.0-D dated September, 2015, and its addendum.

Significant technical changes from the previous edition

• The Cabling Subsystem 1 cabling to coverage areas of ANSI/TIA-862 was added and distinguished from cabling to work area.

• A distinction was made between consolidation points and the connectors contained therein.

• A distinction was made between horizontal connection points and the connectors con-tained therein.

• The contents of ANSI/TIA-568.0-D-1 (updated references, new media types) were incor-porated.

• The formulae for determining cabling lengths for balanced twisted-pair cabling was modi-fied to match the format of ANSI/TIA-568.2.

• Cords with a derating factor of 1.95 were added.

• References were updated to conform with the 2019 edition of the Telecommunications

Industry Association (TIA) Standards Style Guide for Engineering Committees.

Annexes There are six annexes to this Standard. Annex A is normative and considered a requirement of this Standard. Annexes B through F are informative and not considered a requirement of this Standard.

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Relationship to other TIA standards and documents The following are related standards regarding various aspects of structured cabling that were developed and are maintained by Engineering Committee TIA TR-42. An illustrative diagram of the ANSI/TIA-568 Series relationship to other relevant TIA standards is given in figure 1.

• ANSI/TIA-568.1, Commercial Building Telecommunications Infrastructure Standard

• ANSI/TIA-568.2, Balanced Twisted-Pair Telecommunications Cabling and Components

Standard

• ANSI/TIA-568.3, Optical Fiber Cabling and Components Standard

• ANSI/TIA-568.4, Broadband Coaxial Cabling and Components Standard

• ANSI/TIA-569, Telecommunications Pathways and Spaces

• ANSI/TIA-570, Residential Telecommunications Infrastructure Standard

• ANSI/TIA-606, Administration Standard for Telecommunications Infrastructure

• ANSI/TIA-607, Generic Telecommunications Bonding and Grounding (Earthing) for Cus-tomer Premises

• ANSI/TIA-758, Customer-Owned Outside Plant Telecommunications Infrastructure

Standard

• ANSI/TIA-862, Structured Cabling InfrastructureStandard for Intelligent Building Systems

• ANSI/TIA-942, Telecommunications Infrastructure Standard for Data Centers

• ANSI/TIA-1005, Telecommunications Infrastructure Standard for Industrial Premises

• ANSI/TIA-1179, Healthcare Facility Telecommunications Infrastructure Standard

• ANSI/TIA-4966, Telecommunications Infrastructure Standard for Educational Facilities

• ANSI/TIA-4994, Standard for Sustainable Information Communications Technology

• ANSI/TIA-5017, Telecommunications Physical Network Security Standard

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Common Standards

ANSI/TIA-568.0

(Generic)

Premises Standards

ANSI/TIA-568.1

(Commercial)

ANSI/TIA-568.2

(Balanced twisted-pair)

ANSI/TIA-569

(Pathways and spaces)

ANSI/TIA-570

(Residential)

Cabling & Component Standards

ANSI/TIA-568.3

(Optical fiber)

ANSI/TIA-606

(Administration)

ANSI/TIA-942

(Data centers)

ANSI/TIA-568.4

(Broadband coaxial)

ANSI/TIA-1005

(Industrial)

ANSI/TIA-607

(Bonding and grounding [earthing])

ANSI/TIA-1179

(Healthcare)

ANSI/TIA-758

(Outside plant)

ANSI/TIA-862

(Intelligent building systems)

ANSI/TIA-4966

(Educational)

ANSI/TIA-4994

(Sustainability)

ANSI/TIA-5017

(Security)

Figure 1 – Relationship between relevant TIA standards

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The following documents may be useful to the reader:

• National Electrical Safety Code (NESC) (IEEE C2)

• National Electrical Code (NEC) (NFPA 70)

Useful supplements to this Standard are the following BICSI documents: the Telecommunica-tions Distribution Methods Manual, the Outside Plant Design Reference Manual, and the Infor-mation Technology Systems Installation Methods Manual. These manuals provide practices and methods by which many of the requirements of this Standard are implemented.

Other references are listed in annex F.

Introduction This Standard specifies a telecommunications cabling system for buildings that will support a multi-product, multi-vendor environment. It also provides information that may be used for the design of telecommunications products.

Purpose The purpose of this Standard is to enable the planning and installation of a structured cabling system for all types of customer premises. This Standard specifies a system that will support generic telecommunications cabling in a multi-product, multi-vendor environment.

This Standard is the foundation for premises telecommunications cabling infrastructure. Addi-tional requirements are detailed in standards specific to the type of premises. For example, AN- SI/TIA-568.1-E contains additional requirements applicable to commercial building cabling.

Stewardship Telecommunications infrastructure affects raw material consumption. The infrastructure design and installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects of telecommunications infrastructure impact our environment. Since building life cycles are typically planned for decades, technological electronic equipment up-grades are necessary. The telecommunications infrastructure design and installation process magnifies the need for sustainable infrastructures with respect to building life, electronic equip-ment life cycling and considerations of effects on environmental waste. Telecommunications designers are encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as part of the design process.

Specification of criteria Two categories of criteria are specified; mandatory and advisory. The mandatory requirements are designated by the word "shall"; advisory requirements are designated by the words "should”, "may", or "desirable" which are used interchangeably in this Standard.

Mandatory criteria generally apply to protection, performance, administration and compatibility;

they specify minimally acceptable requirements. Advisory criteria are presented when their at-tainment may enhance the general performance of the cabling system in all its contemplated applications.

A note in the text, table, or figure is used for emphasis or offering informative suggestions, or providing additional information.

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Metric equivalents of US customary units The dimensions in this Standard are metric or US customary with approximate conversion to the other.

Life of this Standard This Standard is a living document. The criteria contained in this Standard are subject to revi-sions and updating as warranted by advances in building construction techniques and telecom-munications technology.

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1 SCOPE

This Standard specifies requirements for generic telecommunications cabling. It specifies re-quirements for cabling system structure, topologies and distances, installation, performance, and testing.

NOTE – The diversity of services currently available, coupled with the continual addition of new services, means that there may be cases where limitations to de-sired performance occur. When applying specific applications to these cabling systems, the user is cautioned to consult application standards, regulations, equipment vendors, and system and service suppliers for applicability, limita-tions, and ancillary requirements.

2 NORMATIVE REFERENCES

The following documents are referred to in the text in such a way that some or all of their con-tent constitutes requirements of this document. For dated references, only the edition cited ap-plies. For undated references, the latest edition of the referenced document (including any amendments) applies.

• ANSI/TIA-568.2, Balanced Twisted-Pair Telecommunications Cabling and Components Standard

• ANSI/TIA-568.3, Optical Fiber Cabling and Components Standard

• ANSI/TIA-568.4, Broadband Coaxial Cabling and Components Standard

• ANSI/TIA-569, Telecommunications Pathways and Spaces

• ANSI/TIA-606, Administration Standard for Telecommunications Infrastructure

• ANSI/TIA-607, Generic Telecommunications Bonding and Grounding (Earthing) for Cus-tomer Premises

• ANSI/TIA-1152, Requirements for Field Test Instruments and Measurements for Bal-anced Twisted-Pair Cabling

• ANSI/TIA-5017, Telecommunications Physical Network Security Standard

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3 DEFINITIONS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE

3.1 General

For the purposes of this Standard, the following definitions, acronyms, abbreviations and units of measure apply.

3.2 Definitions

access provider: The operator of any facility that is used to convey telecommunications sig-nals to and from a customer premises.

adapter: A device that enables any or all of the following:

1) different sizes or types of plugs to mate with one another or to fit into a telecom-munications outlet,

2) the rearrangement of leads,

3) large cables with numerous wires to fan out into smaller groups of wires, and

4) interconnection between cables.

administration: The method for labeling, identification, documentation and usage needed to im-plement moves, additions and changes of the telecommunications infrastructure.

alien crosstalk: The unwanted signal coupling from a disturbing pair of a channel, permanent link, or component to a disturbed pair of another channel, permanent link, or component.

attenuation: Reduction in strength of a signal.

backbone: A facility (e.g., pathway, cable or bonding conductor) for Cabling Subsystem 2 and Cabling Subsystem 3.

bonding: The joining of metallic parts to form an electrically conductive path.

cable: An assembly of one or more insulated conductors or optical fibers, within an enveloping sheath.

cable run: A length of installed media, which may include other components along its path.

cable sheath: A covering over the optical fiber or conductor assembly that may include one or more metallic members, strength members, or jackets.

cabling: A combination of all cables, jumpers, cords, and connecting hardware.

Cabling Subsystem 1: Cabling from the equipment outlet to Distributor A, Distributor B, or Dis-tributor C.

Cabling Subsystem 2: Cabling between Distributor A and either Distributor B or Distributor C (if Distributor B is not implemented).

Cabling Subsystem 3: Cabling between Distributor B and Distributor C.

NOTE – See figure 2 for an illustration of the generic cabling topology for Ca-bling Subsystem 1, Cabling Subsystem 2, Cabling Subsystem 3, Distributor A, Distributor B, Distributor C, an optional consolidation point or horizontal connection point, and the equipment outlet. Cabling subsystems do not in-clude equipment cords.

campus: The buildings and grounds having legal contiguous interconnection.

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channel: The end-to-end transmission path between two points at which application-specific equipment is connected.

coaxial cable: A telecommunications cable consisting of a round center conductor surrounded by a dielectric surrounded by a concentric cylindrical conductor (shield) and an optional insulating sheath.

commercial building: A building or portion thereof that is intended for office use.

connecting hardware: A device providing mechanical cable terminations.

connector (plug), duplex; optical fiber: A remateable device that terminates two fibers and mates with a duplex receptacle or adapter.

consolidation point: An assembly of consolidation point connectors.

consolidation point connector: A fixed connection between a distributor and an equipment out-let in a work area.

cord (telecommunications): An assembly of cord cable with a plug on one or both ends.

cord cable: A cable used to construct patch, work area, and equipment cords.

coverage area: The area served by a device.

cross-connect: A facility enabling the termination of cable elements and their interconnection or cross-connection.

cross-connection: A connection scheme between cabling runs, subsystems, and equipment using patch cords or jumpers that attach to connecting hardware on each end.

customer premises: Building(s), grounds and appurtenances (belongings) under the control of the customer.

demarcation point: A point where the operational control or ownership changes.

distributed antenna system: A network of antenna nodes connected to common source(s) that provides wireless service.

Distributor A: Optional connection facility in a hierarchical star topology that is cabled between the equipment outlet and Distributor B or Distributor C.

Distributor B: Optional intermediate connection facility in a hierarchical star topology that is ca-bled to Distributor C.

Distributor C: Central connection facility in a hierarchical star topology.

distributor room: An enclosed architectural space designed to contain Distributor A, Distributor B or Distributor C.

drop cable: Cable linking a drop terminal (e.g. from a service provider) to a premises terminal.

earth: See ground.

earthing: See grounding.

electromagnetic compatibility: The ability of electronic systems to operate in their intended electromagnetic environment without suffering performance degradation and without causing performance degradation in other equipment.

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end user: The owner or user of the premises cabling system.

equipment cord: See cord.

equipment outlet: Outermost connection facility in a hierarchical star topology.

equipment outlet assembly: A grouping in one location of several equipment outlets.

equipment outlet space: Space served by an equipment outlet.

fiber optic: See optical fiber.

ground: A conducting connection, whether intentional or accidental, between an electrical circuit (e.g., telecommunications) or equipment and the earth, or to some conducting body that serves in place of earth.

grounding: Connecting to ground or a conductive body that extends the ground connection.

grounding conductor: A conductor used to connect the grounding electrode to the building's main grounding busbar.

horizontal connection point: An assembly of horizontal connection point connectors.

horizontal connection point connector: A fixed connection between a distributor and an equipment outlet or device in a coverage area.

horizontal cross-connect: Distributor A.

identifier: An item of information that links a specific element of the telecommunications infra-structure with its corresponding record.

infrastructure (telecommunications): A collection of those telecommunications components, excluding equipment, that together provide the basic support for the distribution of information within a building or campus.

insertion loss: The power loss resulting from the insertion of a component, link or channel (often referred to as attenuation).

interconnection: A connection scheme that employs connecting hardware for the direct connec-tion of a cable to another cable without a patch cord or jumper, or employs a patch cord or jumper to make a connection between connecting hardware and equipment.

intermediate cross-connect: Distributor B.

jumper: 1) An assembly of twisted-pairs without connectors, used to join telecommunications circuits/links at the cross-connect. 2) An assembly of optical fiber cable with a connector on each end (often referred to as a cord).

link: A transmission path between two points, not including equipment and cords.

main cross-connect: Distributor C.

media (telecommunications): Wire, cable, conductors or fibers used for telecommunications.

mode: A path of light in an optical fiber.

modular jack: A female telecommunications connector that may be keyed or unkeyed and may have 6 or 8 contact positions, but not all the positions need be equipped with jack contacts.

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modular plug cord: A length of cable with a modular plug on both ends.

multimode optical fiber: An optical fiber that carries many paths of light.

multipair cable: A cable having more than four pairs.

multi-user telecommunications outlet assembly: A grouping in one location of several equipment outlets.

optical fiber: Any filament made of dielectric materials that guides light.

optical fiber cable: A cable assembly containing of one or more optical fibers.

outlet/connector (telecommunications): The fixed connector in an equipment outlet.

outside plant: Telecommunications infrastructure designed for installation exterior to buildings.

passive optical network - A fiber optic point to multipoint network that uses a passive optical splitter as a branching or interconnection device.

passive optical splitter: A non-wavelength-selective passive optical branching device with one or two input ports and more than one output port intended to produce optical power at the output ports according to a target split ratio. See: non-wavelength-selective passive optical branching device.

patch cord: A cord used to establish connections on a patch panel.

patch panel: A connecting hardware system that facilitates cable termination and cabling administration using patch cords.

pathway: A facility for the placement of telecommunications cable.

permanent link: The fixed portion of cabling installed between an equipment outlet and its im-mediate distributor or between two distributors.

plug: A male telecommunications connector.

polarity (optical fiber): A method of positioning optical fibers to ensure connectivity between transmitter(s) and receiver(s).

primary bonding busbar: A busbar placed in a convenient and accessible location and bond-ed, by means of the telecommunications bonding conductor, to the buildings service equipment (power) ground (formerly known as the telecommunications main grounding busbar).

pull strength: See pull tension.

pull tension: The pulling force that can be applied to a cable.

record: A collection of detailed information related to a specific element of the telecommunica-tions infrastructure.

screen: An element of a cable formed by a shield.

secondary bonding busbar: A common point of connection for telecommunications system and equipment bonding to ground, and located in the distributor room (formerly known as the telecommunications grounding busbar).

service provider: The provider of any service that furnishes telecommunications content (transmissions) delivered over access provider facilities.

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shield: 1) A metallic layer placed around a conductor or group of conductors. 2) The cylindrical outer conductor with the same axis as the center conductor that together form a coaxial trans-mission line.

single-mode optical fiber: An optical fiber that carries only one path of light.

splice: A joining of conductors, meant to be permanent.

star topology: A topology in which telecommunications cables are distributed from a central point.

telecommunications: The transmission and reception of information by cable, radio, optical or other electromagnetic systems.

telecommunication bonding conductor: A conductor that interconnects the telecommunications bonding infrastructure to the building's service equipment (power) ground (formerly known as the bonding conductor for telecommunications).

telecommunications infrastructure: See infrastructure (telecommunications).

tie cabling: Cabling between distributors at the same hierarchical level.

topology: The physical or logical arrangement of a telecommunications system.

transition point: A connection between round cable and flat undercarpet cable in Cabling Sub-system 1.

wire: An individually insulated solid or stranded metallic conductor.

wireless: The use of radiated electromagnetic energy (e.g., radio frequency and microwave signals, light) traveling through space to transport information.

work area: A building space where the occupants interact with telecommunications terminal equipment.

3.3 Acronyms and abbreviations

ADSL asymmetrical digital subscriber line AHJ authority having jurisdiction ANSI American National Standards Institute ATM asynchronous transfer mode BRI basic rate interface CATV community antenna television CCA copper coated aluminum CCS copper coated steel CP consolidation point DAS distributed antenna system EIA Electronic Industries Alliance EMI electromagnetic interference EO equipment outlet

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FCC Federal Communications Commission FDDI fiber distributed data interface ffs for future study HC horizontal cross-connect HCP horizontal connection point IC intermediate cross-connect IEC International Electrotechnical Commission ISDN integrated services digital network MC main cross-connect MICE mechanical, ingress, climatic/chemical, electromagnetic MIMO multiple input, multiple output MUTOA multi-user telecommunications outlet assembly NCS National Communications System

NEC National Electrical Code

NESC National Electrical Safety Code

NFPA National Fire Protection Association PBB primary bonding busbar PON passive optical network PRI primary rate interface RF radio frequency SBB secondary bonding busbar TIA Telecommunications Industry Association TSB Telecommunications System Bulletin US United States UTP unshielded twisted-pair VDSL very-high-speed digital subscriber line

3.4 Units of measure

dB decibel °C degrees Celsius ft feet, foot Hz hertz in inch J joule kb/s kilobit per second

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4 ENVIRONMENTAL COMPATIBILITY

Telecommunications infrastructure should be designed to be compatible with the worst case environment to which it will be exposed. If required, compatibility with the environment can be achieved with enhanced components or by means of separation or isolation. See Annex D and TIA TSB-185 for information on environmental classifications.

5 TELECOMMUNICATIONS CABLING SYSTEM STRUCTURE

5.1 General

Figure 2 illustrates a representative model of functional elements that comprise a generic ca-bling system. It depicts the relationship between the elements and how they may be configured to create a total system. The functional elements are “equipment outlets” (EOs), “horizontal connection points” (HCPs), “distributors," and "cabling subsystems", which together comprise a generic telecommunications cabling system.

NOTE – As an example, in a typical commercial building where ANSI/TIA-568.1 applies, Distributor C represents the main cross-connect (MC), Distributor B represents the intermediate cross-connect (IC), Distributor A repre-sents the horizontal cross-connect (HC), and the EO represents the telecommu-nications outlet/connector.

Figure 3 shows examples of interconnections and cross-connections for Distributor A. Similar configurations may be present for Distributor B and Distributor C.

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D C

D A

EO EO EO EO EO EO

D B

D A

EOEOEO

D A

D B

CPCPCPCP

Cabling Subsystem 1 cable

Cabling Subsystem 2 cable

Cabling Subsystem 3 cable

11 1 1

1 1 1

2 2

3 3

Legend:

D A

D B

D C

EO

CP

Distributor A

Distributor B

Distributor C

Equipment outlet

Optional consolidation point connector

Optional tie cabling

NOTE – All elements shown represent cables and connecting hardware, not spaces or pathways.

HCP HCP

HCP Optional horizontal connection point connector

HCP Horizontal connection point connector

Figure 2 – Functional elements that comprise a generic cabling system

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Equipment/splitter Equipment/splitter

D is tri bu to r r oo m

Cabling Subsystem 1

Cabling Subsystem 2 or Cabling Subsystem 3

Distributor A

Distributor A

Distributor A

Distributor A

Interconnection

Interconnection

Cross-connection

Cross-connection

Cross-connection

Figure 3 – Examples of interconnections and cross-connections for Distributor A

5.2 Topology

5.2.1 General

Balanced twisted-pair cabling and optical fiber cabling shall be installed in a star topology.

Broadband coaxial cabling shall be installed in a star topology or in a bus and star topology, with Cabling Subsystem 2, Cabling Subsystem 3, or both, installed in a bus topology, and with Ca-bling Subsystem 1 installed in a star topology. See ANSI/TIA-568.4 for information on bus and star topologies.

There shall be no more than two distributors between Distributor C and an EO or HCP connect-or.

Centralized optical fiber cabling is a hierarchical star topology that extends from Distributor B or Distributor C, through Distributor A (if present) to an EO or HCP connector. See Annex A for additional optical fiber centralized cabling information.

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NOTES:

1 – The hierarchical star topology specified by this Standard has been selected because of its acceptance, flexibility and ease of administration.

2 – It may be necessary to divide the facility (e.g., a campus) into smaller areas within the scope of this Standard and then connect these areas together.

5.2.2 Accommodation of non-star configurations

The use of appropriate interconnections, electronics, or adapters can often accommodate sys-tems that are designed for non-star configurations such as ring, bus, or tree.

5.3 Equipment outlets

EOs provide the outermost location to terminate the cable in a hierarchical star topology. They are used for connection of equipment, administration and testing.

5.4 Distributors

Distributors provide a location for administration, reconfiguration, connection of equipment, and for testing. Distributors can be configured as interconnections or cross-connections (see figure 3). The various premises standards (e.g., those listed in the foreword) may contain additional types of implementations at a distributor.

5.5 Cabling Subsystem 1

The function of Cabling Subsystem 1 is to provide a signal path between Distributor A, Distribu-tor B or Distributor C and equipment in the work area or coverage area. A Cabling Subsystem 1 cable run shall contain no more than one transition point, consolidation point (CP) connector, or HCP connector if an EO is present or two HCP connectors if an EO is not present.

Cabling Subsystem 1 for a work area shall terminate in an EO. Cabling Subsystem 1 for a cov-erage area shall terminate in an EO unless an HCP connector is present, in which case the EO is optional.

Splices shall not be installed as part of balanced twisted-pair Cabling Subsystem 1. Splitters shall not be installed as part of optical fiber Cabling Subsystem 1.

Figure 4 shows examples of Cabling Subsystem 1 cabling to coverage areas and work areas.

The coverage area examples show the use of an HCP configured as an interconnection or as a cross-connection as well as cabling without an HCP. Work area examples show cabling with and without a CP.

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Equipment

Distributor room

DA

Equipment

Equipment

Equipment

Equipment

Equipment

Coverage area

Work areaTo Distributor B or Distributor C

Legend

DA Distributor A

Cross-connect

Equipment outlet

Horizontal connection point connector

Horizontal connection point connectors configured as cross-connection

Consolidation point connector

Equipment termination

Cabling Subsystem 1 cable

Cabling Subsystem 2 cable or Cabling Subsystem 3 cable

Coverage area cable

Equipment cord

Figure 4 – Examples of Cabling Subsystem 1 cabling

5.6 Cabling Subsystem 2 and Cabling Subsystem 3

Cabling Subsystem 2 and Cabling Subsystem 3 provide signal paths between Distributors (see figure 2). See annex C for information regarding multi-tenant Cabling Subsystem 2 and Cabling Subsystem 3.

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NOTE – The use of Distributor B is optional. It may be used, for example, to overcome distance limitations of the application or media. The use of Distributor B may allow a greater selection of media types for Cabling Subsystem 2 and Ca-bling Subsystem 3.

5.7 Optional tie cabling

Optional tie cabling provides a signal path between distributors at the same hierarchal level and can be used to provide redundancy or to accommodate non-star topologies.

5.8 Recognized cabling

The recognized media, which shall be used individually or in combination, are:

a) 100-ohm balanced twisted-pair cabling (ANSI/TIA-568.2), category 5e or higher;

NOTES:

1 – To support a wide range of applications, Category 6A cabling may be re-quired. See Annex C.

2 – Category 8 cabling supports channels with a maximum of 2 connections to a maximum length of 30 m (98 ft).

3 – Category 8 components can be used to construct category 6A 100 m (328 ft) channels. See TIA TSB-184 for power delivery efficiency achievable with catego-ry 8 components.

b) multimode optical fiber cabling (ANSI/TIA-568.3) 2-fiber (or higher fiber count);

c) single-mode optical fiber cabling (ANSI/TIA-568.3) 2-fiber (or higher fiber count); and

d) broadband coaxial cabling (ANSI/TIA-568.4).

Recognized cabling components shall meet applicable requirements specified in ANSI/TIA-568.2, ANSI/TIA-568.3, ANSI/TIA-568.4, and, if applicable, the specific premises standard.

5.9 Open space cabling

Open space cabling design practices use multi-user telecommunications outlet assemblies (MUTOAs), EO assemblies, CPs, and HCPs to provide flexible layouts. Such spaces are fre-quently rearranged to meet changing requirements of the users. The use of CPs and HCPs may allow open spaces to be reconfigured with minimal changes to Cabling Subsystem 1.

5.9.1 Multi-user telecommunications outlet assembly

MUTOAs may be advantageous in open spaces that have equipment that is moved or frequent-ly reconfigured. A MUTOA facilitates the termination of single or multiple Cabling System 1 ca-bles in a common location within a furniture cluster or similar open area. The use of MUTOAs allows Cabling System 1 cabling to remain intact when the open area plan is changed. Equip-ment cords originating from the MUTOA should be routed through EO space area pathways (e.g., furniture pathways). These equipment cords shall be connected directly to equipment without the use of any additional intermediate connections (see figure 5).

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