2024年4月10日发(作者：怀以晴)

ANSI/TIA/EIA 568 Standards

ANSI/TIA/EIA 569 Standards

Structured Cabling Systems

ANSI/TIA/EIA 568

COMMERCIAL BUILDING TELECOMMUNICATIONS

CABLING STANDARD

I. PURPOSE

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.

II. 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

III. SCOPE

This standard specifies cabling of commercial buildings which are office oriented. Typically, this

includes sites of up to 3,000 to 1,000,000

50,000 users.

IV. 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 meters. An additional 10 meters

is allowed for work area cables, patch cables, etc.

B. Recognized Cables

1.4- pair 100

2. 2-pair 150

UTP cable

STP cable

M2

with a population up to

3. 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:

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

2. 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

shall be less than or equal

c. 2-fiber, 62.5/125 um optical fiber cable

D. The amount of untwisting of individual pairs to terminate

to .5 in. for Category 5 and less than or equal to 1.0 in. for Category 4.

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

V. BACKBONE CABLING

The purpose of backbone cabling is to provide interconnections 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

1. 100

2. 150

UTP multipair backbone cable

STP cable

3. 62.5/125 um optical fiber cable

4. Single Mode Optical Fiber

C. Maximum Distance

1. 100

2. 150

UTP cable - 800 meters

STP cable - 700 meters

3. 62.5/125 um optical fiber - 2000 meters

4. Single mode optical fiber - 3000 meters

VI. 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

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

B. Function is for the termination of horizontal cable

VIII. EQUIPMENT ROOMS

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

IX. ENTRANCE FACILITIES

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

X. UTP CABLING SYSTEMS

A. 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 UTPcables and associated connecting hardware whose

characteristics are specified up to 20 MHz.

2024年4月10日发(作者：怀以晴)

ANSI/TIA/EIA 568 Standards

ANSI/TIA/EIA 569 Standards

Structured Cabling Systems

ANSI/TIA/EIA 568

COMMERCIAL BUILDING TELECOMMUNICATIONS

CABLING STANDARD

I. PURPOSE

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.

II. 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

III. SCOPE

This standard specifies cabling of commercial buildings which are office oriented. Typically, this

includes sites of up to 3,000 to 1,000,000

50,000 users.

IV. 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 meters. An additional 10 meters

is allowed for work area cables, patch cables, etc.

B. Recognized Cables

1.4- pair 100

2. 2-pair 150

UTP cable

STP cable

M2

with a population up to

3. 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:

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

2. 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

shall be less than or equal

c. 2-fiber, 62.5/125 um optical fiber cable

D. The amount of untwisting of individual pairs to terminate

to .5 in. for Category 5 and less than or equal to 1.0 in. for Category 4.

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

V. BACKBONE CABLING

The purpose of backbone cabling is to provide interconnections 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

1. 100

2. 150

UTP multipair backbone cable

STP cable

3. 62.5/125 um optical fiber cable

4. Single Mode Optical Fiber

C. Maximum Distance

1. 100

2. 150

UTP cable - 800 meters

STP cable - 700 meters

3. 62.5/125 um optical fiber - 2000 meters

4. Single mode optical fiber - 3000 meters

VI. 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

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

B. Function is for the termination of horizontal cable

VIII. EQUIPMENT ROOMS

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

IX. ENTRANCE FACILITIES

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

X. UTP CABLING SYSTEMS

A. 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 UTPcables and associated connecting hardware whose

characteristics are specified up to 20 MHz.