EIA/TIA 568A
EIA/TIA 568B
PIN
a
Wire
b
PIN
Wire
3
Orange/White
3
Green/White
4
Blue
4
Blue
5
Blue/White
5
Blue/White
6
Orange
6
Green
7
Brown/White
7
Brown/White
8
Brown
8
Brown
NOTE
l
a. An RJ45 connector has eight pins.
l
b. The wire of a twisted pair connects to the RJ45 connector pin. The color of the plastic jacket is
considered as the name of the wire.
Straight-Through and Crossover Cables
Ethernet cables are classified into straight-through and crossover cables according to the
wiring scheme used at the two ends of the cables. The interfaces of most devices can
dynamically adapt to straight-through cables and crossover cables. For interfaces that cannot
dynamically adapt to the two types of cables, connect interfaces at the same layer using the
crossover cables and interfaces at different layers using the straight-through cables.
and
show how to distinguish and make straight-through cables and
crossover cables. You need to strictly observe the wiring scheme to ensure the quality of
services.
l
Straight-through cable
The straight-through cable is also called the standard cable. Both ends of the cable use
wiring scheme EIA/TIA T568A or EIA/TIA T568B. You are advised to use wiring
scheme EIA/TIA T568B when you make straight-through cables.
shows the
detail.
HUAWEI USG6000 Series
Hardware Guide
A Appendix
Issue 08 (2017-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
381