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S2700 Series Switches Hardware Description

This document provides an overall description of the S2700 hardware, helping you obtain detailed information about each chassis, cable, and optical module.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Ethernet Cable

Ethernet Cable

Types of Ethernet Cables

An Ethernet cable connects a maintenance terminal to the console port on the device for local or remote maintenance.

Ethernet cables are classified into straight-through cables and crossover cables.

  • Straight-through cable: The twisted pairs in the RJ45 connectors at both ends are crimped in the same sequence. A straight-through cable connects two devices of different types, for example, a PC and a switch.
  • Crossover cable: The twisted pairs in the RJ45 connectors at two ends are crimped in different sequences. A crossover cable connects two devices or interfaces of the same type, for example, two PCs.

Crossover and straight cables only differ in wire sequences, and function the same when transmitting data.

Huawei switches support both straight-through and crossover cables and their ports are adaptive to the cable types.

Appearance and Structure

NOTE:
The straight-through cable and the crossover cable have the same appearance and use the RJ45 connector.

Figure 7-20 shows the appearance of an Ethernet cable.

Figure 7-20 Appearance of an Ethernet cable

Figure 7-21 shows the structure of an Ethernet cable.

Figure 7-21 Structure of an Ethernet cable

Pin Assignments

Table 7-10 shows the pin assignments of a straight-through cable.

Table 7-10 Pin assignments of a straight-through cable

X1 Pin

Wire Color

X2 Pin

1

White and orange

1

2

Orange

2

3

White and green

3

4

Blue

4

5

White and blue

5

6

Green

6

7

White and brown

7

8

Brown

8

Table 7-11 shows the pin assignments of a crossover cable.

Table 7-11 Pin assignments of a crossover cable

X1 Pin

Wire Color

X2 Pin

1

White and orange

3

2

Orange

6

3

White and green

1

4

Blue

4

5

White and blue

5

6

Green

2

7

White and brown

7

8

Brown

8

NOTE:

To achieve the best electrical transmission performance, ensure that the wires connected to pins 1 and 2 and to pins 3 and 6 are twisted pairs.

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Updated: 2019-08-19

Document ID: EDOC1000027458

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