Resource: ansi standards 568 and 569 Industry standards and building requirements

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Resource: ANSI Standards 568 and 569

Industry standards and building requirements

Industry Standards and Building Requirements 1

ANSI/TIA/EIA 568 Standards 2

Purpose 2

Cabling Structure

The elements of a cabling system are listed below: 2

Scope 2

Horizontal Cabling 2

Backbone Cabling 2

Work Area 3

Equipment Rooms 3

Entrance Facilities 3

UTP Cabling Systems 3

UTP Patch Cable and Jumpers 3

ANSI/TIA/EIA 569 Standard 5

Purpose 5

Scope 5

Horizontal Pathways 5

Backbone Pathways 5

Workstation 5

Telecommunications Closet 6

Labeling and Color Coding 6

Colour Coding Rules 6

Differentiation of Termination Fields By Performance Category 6

Industry Standards and Building Requirements

The American National Standards Institute (ANSI) is a private, non-profit organization that administers and coordinates the U.S. voluntary standardization and conformity assessment system. For more information about ANSI visit they’re web site at:
At this stage there are two Standards that you need to address: -

  • ANSI/TIA/EIA 568 Standards

  • ANSI/TIA/EIA 569 Standards

ANSI/TIA/EIA 568 Standards

Commercial Building Telecommunications Cabling Standard


This standard outlines specifications for a generic telecommunications cabling system. The purpose is to enable the planning and installation of telecommunications cabling with limited knowledge of the products that will be installed.
This standard also establishes performance criteria for various system configurations and their elements.

Cabling Structure
The elements of a cabling system are listed below:

a. Horizontal Cabling
b. Backbone Cabling
c. Work Area
d. Telecommunications Closet
e. Equipment Room
f. Entrance Facilities


This standard specifies cabling of commercial buildings which are office oriented. Typically, this includes sites of up to 3,000 to 1,000,000 m2 with a population of up to 50,000 users.

Horizontal Cabling

a. Horizontal cabling shall be of star topology, each work area connector shall be connected to a telecommunications closet. The maximum horizontal distance shall be 90 metres. An additional 10 meters is allowed for work area cables, patch cables, etc.

b. Recognised Cables:

i. 4-pair 100  UTP cable
ii. 2-pair 150  STP cable
iii. 2-fiber, 62.5/125 um optical fiber cable

c. Outlet/Connector A minimum of two telecommunications outlets shall be provided to each work area. The two outlets shall be configured as follows:

i. One connector shall be supported by a 4-pair 100  UTP cable, Category 3 or higher

ii. The other shall be supported by a minimum of one of the following:

a) 4-pair 100  UTP cable (Category 5 recommended)
b) 2-pair 150  STP cable
c) 2-fibre, 62.5/125 um optical fibre cable

d. The amount of untwisting of individual pairs to terminate shall be less than or equal to .5 inches for Category 5 and less than or equal to 1.0 inches for Category 4.

e. Cable bend radius shall not be less than 4 times the cable diameter.

Backbone Cabling

The purpose of Backbone Cabling is to provide inter-connections between telecommunications entrance facilities, equipment rooms and closets. The backbone cabling includes transmission media, intermediate and main cross-connects, and mechanical terminations.

a. Backbone Cabling shall use the conventional hierarchical star topology

b. Recognized Cables
i. 100  UTP multi-pair backbone cable
ii. 150  STP cable

iii 62.5/125 um optical fiber cable

iv. Single Mode Optical Fiber

c. Maximum Distance

i. 100 UTP cable - 800 meters
ii. 150  STP cable - 700 meters

iii 62.5/125 um optical fiber - 2000 meters

iv. Single mode optical fiber - 3000 meters

Work Area

Some networks require application specific electrical components on the telecommunications outlet of the horizontal cabling. These application specific components shall not be installed as part of the horizontal cabling. When needed they shall be placed external to the outlet.

a. Telecommunication Closets

i. Shall be designed per ANSI/EIA/TIA 569
b. Function is for the termination of horizontal cable

Equipment Rooms

a. Shall be designed per ANSI/EIA/TIA 569

Entrance Facilities

a. Requirements are specified in ANSI/EIA/TIA 569

UTP Cabling Systems

  1. Categories of UTP Cabling are as follows:

  1. Category 1 & 2: These cables and connecting hardware are not covered or recognized as a part of the standard.

  2. Category 3: This designation applies to UTP cable and hardware whose transmission characteristics are specified up to 16 MHz.

  3. Category 4: This designation applies to UTP cables and associated connecting hardware whose characteristics are specified up to 20 MHz.

  4. Category 5: This designation applies to UTP cable and hardware whose transmission characteristics are specified up to 100 MHz.

UTP Patch Cable and Jumpers

a. Length

  1. In main cross-connect and intermediate cross-connect, patch cord lengths should not exceed 20 meters.

  2. In the telecommunications closet, jumpers that bridge horizontal wiring should not exceed 6 meters. Lengths in excess of these shall be deducted for maximum cable length.

b. To assure adequate flex-life, UTP patch cords shall have stranded conductors.



ANSI/TIA/EIA 569 Standard

Commercial Building Standard for Telecommunications Pathways & Spaces


The purpose is to standardise design and construction practices within and between buildings which are in support of telecommunications equipment and media. Standards are outlined for rooms or areas and pathways into and through which telecommunications media and equipment are installed.


The scope of the standard is limited to the telecommunications aspect of commercial building construction and design. The standard does not cover safety aspects of building design.

Selections within the standard include:

a. Horizontal Pathways

b. Backbone Pathways

c. Workstation

d. Telecommunications Closet

e. Equipment Room

f. Entrance Facilities

Horizontal Pathways

Horizontal Pathways are facilities for the installation of telecommunication media from the telecommunication closet to the work area outlet.

Backbone Pathways

Backbone Pathways consist of intra and inter building pathways.

  1. Intra-building Pathways consist of conduit, sleeves and trays. They provide the means for routing cables from:
    i. The entrance room or space to telecommunications closets.
    ii. Equipment rooms to the entrance room or space, or telecommunications closet.

b Inter-building Pathways interconnect separate buildings, and consist of underground, buried, aerial and tunnel pathways.


A typical example is a 4' x 4' electrical box having the horizontal cable terminated by connectors on faceplate. A minimum of one outlet shall be installed per workstation.

Telecommunications Closet

a. There shall be a minimum of one closet per floor.

b. Additional closets should be added if the floor area to be served exceeds 1000 square meters or the horizontal distance to the work area is greater than 300 ft.

Labeling and Color Coding

a. Labels are divided into 3 categories
i. Adhesive
ii. Insert
iii. Other

b. Adhesive labels shall meet adhesion, defacement and legibility requirements defined in U.L. 969. Labels shall also meet exposure requirements in U.L. 969.

c. Insert labels shall also meet U.L. 969 requirements for defacement, legibility and general exposure.

d. Other labels include special purpose labels, such as tie-on labels.

e. All bar codes shall be either Code 39 or Code 128 conforming to USS-39 and USS-128 respectively. All Code 39 bar code ratios shall be within 2.5:1 to 3.0:1. If a wand scanner is to be used, a minimum quiet zone of 6.35 mm is required on each side of the bar code.

Colour Coding Rules

a. Termination labels at the two ends of the cable shall be of the same color.

b. Cross-connections made between termination fields are generally of two different colors.

c. The color orange is used for the demarcation point.

d. Green is for the network connections on the customer side of the demarcation point.

e. Purple is for the termination of cables originating from common equipment.

f. White is for the first level backbone media.

g. Grey is for the second level backbone.

h. Blue is for the termination of station telecommunications media.

i. Brown is for inter-building backbone cable terminations.

j. Yellow is for termination of auxiliary circuits, alarms, security and other miscellaneous circuits.

k. Red is for termination of key telephone systems.

l. White may be used to identify second level backbone terminations in remote "non-hub" buildings.

Differentiation of Termination Fields By Performance Category

If cables are of different performance classes, their ends should indicate the difference. This can be done by suitable marking or enhanced colour coding. Alternatively, the labels may be marked with the proper category of the cable.

ANSI Standards 568 and 569 Page of

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