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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Common G.SHDSL Interface Interconnection Faults

Common G.SHDSL Interface Interconnection Faults

This section provides typical cases about the G.SHDSL interface interconnection.

Fault Symptom

The G.SHDSL interface cannot be activated for a long time or alternates between Up and Down.

Possible Causes

  • The ADSL/VDSL splitter is used on the G.SHDSL line.
  • The G.SHDSL cable is not the matching one.
  • The DSLAM connected to the router uses an old G.SHDSL chip.
  • There are electromagnetic interference sources such as electric motors, transformers, and electric generator along the G.SHDSL line.

Troubleshooting Procedure

  1. Check whether the ADSL/VDSL splitter is used on the G.SHDSL line.
  2. Check whether the G.SHDSL cable is the matching one.

    Figure 12-2 shows the matching cables of the AR.
    Figure 12-2  Matching cables of the AR

  3. If the fault is not rectified, run the following command to configure the compatibility mode of the G.SHDSL uplink interface:

    [Huawei-Atm0/0/0]shutdown
    [Huawei-Atm0/0/0]shdsl capability g-shdsl.bis
    [Huawei-Atm0/0/0]shdsl compatibility pmms normal vendor gs enhanced filter normal
    [Huawei-Atm0/0/0]undo shutdown 

    If the fault persists, run the following command:

    [Huawei-Atm0/0/0]shutdown
    [Huawei-Atm0/0/0]shdsl compatibility pmms long vendornormal filter normal
    [Huawei-Atm0/0/0]undo shutdown 

  4. Leave the G.SHDSL line far away form the electromagnetic interference sources.

    NOTE:

    Performing the preceding operations can solve most interconnection problems of the G.SHDSL interface.

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Updated: 2019-05-10

Document ID: EDOC1000079719

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