ANSI/TIA/EIA 568-B.1: 2001年6类双绞线标准详解

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ANSI/TIA/EIA-568-B系列标准是关于商业建筑电信布线系统的通用要求，特别是关注铜缆双绞线的标准。这个标准是TIA/EIA-568-A的修订版，于2001年5月发布，旨在适应不断增长的高速通信需求和带宽要求。6类双绞线标准的出台是为了满足更高传输速率的需求，例如千兆以太网，它提供了比5类和超5类线更高的性能。 TIA（电信行业协会）和EIA（电子工业联盟）共同制定了这一标准，用于规范和促进通信产品制造商与购买者之间的理解和互操作性。TIA/EIA-568-B.1是该系列标准的一部分，主要关注一般要求。值得注意的是，这些标准的存在并不限制制造商生产非标准产品，同时也不妨碍非TIA/EIA成员自愿使用这些标准，无论是在国内还是国际市场。在内容中提到了TIA/EIA-568-B.1-2001，这是6类线标准的具体实施版本，批准于2001年4月12日。这个标准的出台标志着从5类线到超5类线，再到6类线的升级，6类线能够提供更宽的频带宽度和更好的串扰抑制，以支持高速数据传输。随着技术的进步，6类线逐渐被用户接纳，成为构建现代网络基础设施的重要组成部分。此外，还提到了ISO/IEC JTC/SC 25/WG3 N 598工作组编写的铜缆6类线标准，这表明除了TIA/EIA的标准外，还有国际标准化组织（ISO）和国际电工委员会（IEC）的相关规定。这两个标准的出台进一步确保了全球范围内布线系统的兼容性和一致性。总结来说，TIA/EIA-568-B系列标准，尤其是TIA/EIA-568-B.1，是关于商业建筑中铜缆双绞线布线的重要规范，它定义了6类线的技术参数和性能指标，以支持不断增长的高速通信需求。这个标准不仅影响了产品设计和制造，还影响了网络基础设施的规划、安装和维护，确保了数据传输的高效和可靠。同时，它与ISO/IEC的标准相辅相成，共同推动了全球电信行业的标准化进程。

TIA/EIA-568-B.1

2 SCOPE

This Standard specifies minimum requirements for telecommunications cabling within a commercial

building and between buildings in a campus environment. It specifies cabling requirements, cabling

distances, telecommunications outlet/connector configurations, and a recommended topology.

Building telecommunications cabling specified by this Standard is intended to support a wide range of

different commercial building sites and applications (e.g., voice, data, text, video, and image). Typically,

this range includes sites with a geographical extent from 3 000 m (approximately 10 000 ft), up to

1 000 000 m

(approximately 10 000 000 ft

) of office space, and with a population of up to 50 000

individual users.

Telecommunications cabling systems specified by this Standard are intended to have a useful life in

excess of ten years.

This Standard applies to the telecommunications cabling systems of buildings for commercial

enterprises that are office oriented.

2.1 Normative references

The following standards contain provisions that, through reference in this text, constitute provisions of

this Standard. At the time of publication, the editions indicated were valid. All standards are subject to

revision; parties to agreements based on this Standard are encouraged to investigate the possibility of

applying the most recent editions of the standards indicated. ANSI and TIA maintain registers of

currently valid national standards published by them.

a) ANSI/TIA/EIA-526-7, Optical Power Loss Measurements of Installed Singlemode Fiber Cable

Plant

b) ANSI/TIA/EIA-526-14-A, Optical Power Loss Measurements of Installed Multimode Fiber Cable

Plant

c) ANSI/TIA/EIA-568-B.2, Commercial Building Telecommunications Cabling Standard; Part 2:

Balanced Twisted-Pair Cabling Components

d) ANSI/TIA/EIA-568-B.3, Optical Fiber Cabling Components Standard

e) ANSI/TIA/EIA-569-A, Commercial Building Standard for Telecommunications Pathways and

Spaces

f) ANSI/TIA/EIA-570-A, Residential Telecommunications Cabling Standard

g) ANSI/TIA/EIA-606, Administration Standard for the Telecommunications Infrastructure of

Commercial Buildings

h) ANSI/TIA/EIA-607, Commercial Building Grounding/Bounding Requirements

i) ANSI/TIA/EIA-758, Customer-Owned Outside Plant Telecommunications Cabling Standard

j) ASTM D 4566, Standard Test Methods For Electrical Performance Properties Of Insulations And

Jackets For Telecommunications Wire And Cable

k) IEC 60603-7, Connectors for Frequencies below 3 MHz for use with Printed Circuit Boards, Part

7: Detailed Specifications for Connectors, 8-way Including Fixed and Free Connectors with

Common Mating Features

NOTE - Although the title of IEC 60603-7 appears to limit the bandwidth of the 8 -way

modular connectors to 3 MHz or less, these types of connectors may be qualified for

use at higher frequencies when tested and proven to be compliant with the performance

TIA/EIA-568-B.1

3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, AND UNITS

OF MEASURE

3.1 General

This clause contains the definitions of terms, acronyms, and abbreviations that have special technical

meaning or that are unique to the technical content of this Standard. Special definitions that are

appropriate to individual technical clauses are also included.

3.2 Definition of terms

The generic definitions in this clause have been formulated for use by the entire family of

telecommunications infrastructure standards. Specific requirements are found in the normative clauses

of this Standard. For the purposes of this Standard, the following definitions apply.

access provider: The operator of any facility that is used to convey telecommunications signals 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

telecommunications 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.

adapter; optical fiber duplex: A mechanical device designed to align and join two duplex optical fiber

connectors (plugs) to form an optical duplex connection.

administration: The method for labeling, identification, documentation and usage needed to implement

moves, additions and changes of the telecommunications infrastructure.

attenuation: The decrease in magnitude of transmission signal strength between points, expressed in

dB as the ratio of output to input signal level.

backbone: A facility (e.g., pathway, cable or conductors) between telecommunications rooms, or floor

distribution terminals, the entrance facilities, and the equipment rooms within or between buildings.

backbone cable: See backbone .

bonding: The permanent joining of metallic parts to form an electrically conductive path that will assure

electrical continuity and the capacity to conduct safely any current likely to be imposed on it.

bridged tap: A connection that enables multiple appearances of the same cable pair at several

distribution points.

bundled cable: An assembly of two or more cables continuously bound together to form a single unit.

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.

TIA/EIA-568-B.1

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

campus: The buildings and grounds having legal contiguous interconnection.

centralized cabling: A cabling configuration from the work area to a centralized cross-connect using

pull through cables, an interconnect, or splice in the telecommunications room.

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

is connected.

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

connecting hardware: A device providing mechanical cable terminations.

connector, small form factor: An optical fiber duplex connector with a size approximating that of an

8-position modular outlet/connector typically used for terminating 4-pair copper cable.

consolidation point: A location for interconnection between horizontal cables extending from building

pathways and horizontal cables extending into furniture pathways.

cord (telecommunications): A cable using stranded conductors for flexibility, as in distribution cords

or line cords.

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.

data: Electronically encoded information.

delay skew: The difference in propagation delay between any two pairs within the same cable sheath.

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

drain wire: A non-insulated conductor placed in electrical contact with a shield.

electromagnetic interference: Radiated or conducted electromagnetic energy that has an undesirable

effect on electronic equipment or signal transmissions.

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

entrance facility (telecommunications): An entrance to a building for both public and private network

service cables (including wireless) including the entrance point of the building and continuing to the

entrance room or space.

entrance point (telecommunications): The point of emergence for telecommunications cabling

through an exterior wall, a floor, or from a conduit.

TIA/EIA-568-B.1

entrance room or space (telecommunications): A space in which the joining of inter or intra building

telecommunications backbone facilities takes place.

equal level far-end crosstalk: A measure of the unwanted signal coupling from a transmitter at the

near-end into another pair measured at the far-end, and relative to the received signal level.

equipment cable, cord: A cable or cable assembly used to connect telecommunications equipment

to horizontal or backbone cabling.

equipment room (telecommunications): An environmentally controlled centralized space for

telecommunications equipment that usually houses a main or intermediate cross-connect.

far-end crosstalk loss: A measure of the unwanted signal coupling from a transmitter at the near end

into another pair measured at the far end, and relative to the transmitted signal level.

fiber optic: See optical fiber .

furniture cluster: A contiguous group of work areas, typically including space divisions, work surfaces,

storage, and seating.

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.

high-order mode transient losses: Losses in power caused by the attenuation in the cladding of

multimode optical fiber.

horizontal cabling: (1)The cabling between and including the telecommunications outlet/connector and

the horizontal cross-connect. (2) The cabling between and including the building automation system

outlet or the first mechanical termination of the h orizontal connection point and the horizontal cross-

connect.

horizontal cross-connect: A cross-connect of horizontal cabling to other cabling, e.g., horizontal,

backbone, and equipment.

hybrid cable: An assembly of two or more cables , of the same or different types or categories, covered

by one overall sheath.

hybrid optical fiber cable: An optical fiber cable containing two or more fiber types (e.g., multimode

and singlemode).

infrastructure (telecommunications): A collection of those telecommunications components,

excluding equipment, that together provide the basic support for the distribution of all information within

a building or campus.

insertion loss: The signal loss resulting from the insertion of a component, or link, or channel, between

a transmitter and receiver (often referred to as attenuation).

interconnection: A connection scheme that employs connecting hardware for the direct connection of

a cable to another cable without a patch cord or jumper.

intermediate cross-connect: A cross-connect between first level and second level backbone cabling.

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