Technical Bulletin

ManualsBrandsPanduit Manuals& CordUTP Patch Cord, Cat 6A, 3', Off White

Table Of Contents

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TECHNICAL

REFERENCE

TR103

Patch Cord Wiring Guide

Introduction

Panduit is a leading supplier of structured cabling systems and Unified Physical Infrastructure (UPI), enabling the

physical infrastructure to be scalable, flexible, and easily manageable, while supporting Ethernet communications

at ever-increasing data rates. Panduit is aware of confusion in the marketplace regarding patch cord wiring

schemes and when they should be employed. These wiring schemes include T568A, T568B, crossover (flipped),

and rolled (roll-over).The purpose of this technical reference is to eliminate any confusion, by providing an

overview of each wiring scheme as well as typical deployment strategies in structured cabling systems.

T568A & T568B Wiring

T568A and T568B wiring schemes are defined in the ANSI/TIA-568-C.2 standard for 4-pair (8-position,

8-conductor) RJ45 interfaces. T568A and T568B are straight-through wiring schemes. Each conductor inside the

patch cable connects to the same pin on both modular plug ends. As shown in the illustration below, the only

difference between T568A and T568B is the orientation of the green and orange pairs.

When used in traditional fashion, there is no functional difference between patch cords with T568A or T568B

wiring schemes. Both wiring schemes are acceptable in network topologies, and are essentially interchangeable.

T568A is the default wiring scheme in ANSI/TIA-568-C.2, with T568B listed as being optional. ANSI/TIA-568-C.2,

is the most popular wiring scheme in modern installations. T568B is also consistent with the older AT&T 258A

wiring scheme that many installers are already accustomed to. The US Government has standardized on T568A.

It is the required wiring scheme for all government installations and in all performance categories.

Although completely interchangeable in traditional plug-to-plug form, installers must be cognizant of the patch

cord wiring scheme if they cut the patch cord to terminate a jack module on one end. This technique is often used

when the modular plug is connected to a switch, and the jack module is installed in a modular patch panel. To

Summary of content (5 pages)

PAGE 1
TE CHNICA L RE FE RE NCE TR103 Patch Cord Wiring Guide Introduction Panduit is a leading supplier of structured cabling systems and Unified Physical Infrastructure (UPI), enabling the physical infrastructure to be scalable, flexible, and easily manageable, while supporting Ethernet communications at ever-increasing data rates. Panduit is aware of confusion in the marketplace regarding patch cord wiring schemes and when they should be employed.
PAGE 2
TE CHNICA L RE FE RE NCE TR103 ensure the jack-to-plug link transmits Ethernet traffic, the jack module must be terminated using the same wiring scheme as the patch cord modular plug. Installers appreciate that the termination cap on all Panduit jack modules includes a wire map label that illustrates the correct conductor positions for T568A and T568B termination. Panduit manufactures a complete line of patch cords in Category 6A, 6, and 5e performance categories.
PAGE 3
TE CHNICA L RE FE RE NCE TR103 Crossover (Flipped) Wiring Although not specifically defined in ANSI/TIA-568-C.2, crossover patch cords, also known as flipped patch cords, are used to connect a PC directly to another PC, a hub to hub, or switch to switch. The term crossover is used because the send and receive pairs are crossed from one modular plug (end 1) to the other (end 2).
PAGE 4
TE CHNICA L RE FE RE NCE TR103 The table below provides a part number matrix that should be referenced when ordering a crossover cord in different performance levels, lengths, and standard colors.
PAGE 5
TE CHNICA L RE FE RE NCE TR103 Rolled (roll-over) wiring is also available in all Panduit patch cord types. The table below provides a part number matrix that should be referenced when ordering rolled patch cords in different performance levels, lengths, and standard colors.