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NE40E V800R010C10SPC500 Installation Guide

This is NE40E V800R010C10SPC500 Installation Guide
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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).
Testing the Connectivity of Assembled Ethernet Cables

Testing the Connectivity of Assembled Ethernet Cables

This section describes how to test an assembled Ethernet cable to check whether the connectors and wires at both ends are correctly connected. A straight-through cable is used as an example.

Context

Straight-through cables and crossover cables are both commonly used in Huawei products.

  • Straight-through cables are connected in a one-to-one manner. They are used to connect network adapters to equipment such as switches and hubs. Table 4-7 lists the connections of core wires in a straight-through cable.
    Table 4-7 Connections of core wires in a straight-through cable

    RJ45 Connector 1

    RJ45 Connector 2

    Core Wire Color

    Twisted

    2

    2

    Orange

    Yes

    1

    1

    Orange-White

    6

    6

    Green

    Yes

    3

    3

    Green-White

    4

    4

    Blue

    Yes

    5

    5

    Blue-White

    8

    8

    Brown

    Yes

    7

    7

    Brown-White

  • Crossover cables are connected in a crossover manner. They are used to connect network adapters to equipment such as switches and hubs. Table 4-8 lists the connections of core wires in a crossover cable.
    Table 4-8 Connections of core wires in a crossover cable

    RJ45 Connector 1

    RJ45 Connector 2

    Core Wire Color

    Twisted

    6

    2

    Orange

    Yes

    3

    1

    Orange-White

    2

    6

    Green

    Yes

    1

    3

    Green-White

    4

    4

    Blue

    Yes

    5

    5

    Blue-White

    8

    8

    Brown

    Yes

    7

    7

    Brown-White

Figure 4-38 shows the pins of an RJ45 connector.

Figure 4-38 Pins of an RJ45 connector

Procedure

  1. Feed both cable connectors into the ports on a cable tester.
  2. Turn on the tester. If the indicators 1 to G light simultaneously, pins are working normally and the wires are connected correctly.

    NOTE:

    Turn the switch to the S position and check whether indicators on the left and right sections of the tester light simultaneously, as shown in Figure 4-39.

    Figure 4-39 Testing the connectivity of an assembled Ethernet cable

  3. Gently shake the connectors and check whether indicators on the left and right sections of the tester light simultaneously. If yes, the metal contact strips are in good contact with the core wires and the ports on the cable tester, as shown in Figure 4-40.

    Figure 4-40 Checking the reliability of metal contacts

    The procedure for testing a crossover cable is similar to that for testing a straight-through cable except for the sequence in which the indicators light. You need to refer to the core wire connections of a crossover cable provided in Table 4-8.

    A crossover cable is well-made only if the indicators light in the following sequence:

    In the master (left) section of the tester, the indicators turn on in the sequence of 1-8-G. In the slave (right) section of the tester, the indicators turn on in the sequence of 3-6-1-4-5-2-7-8-G.

    NOTE:

    If a cable tester is unavailable, you can use a multimeter to perform a simple test, as shown in Figure 4-41.

    Figure 4-41 Testing the connectivity of an Ethernet cable using a multimeter

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Updated: 2019-01-03

Document ID: EDOC1100055059

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