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Voice Feature Guide 01

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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).
POTS User Circuit Test

POTS User Circuit Test

A POTS user circuit test is used to check whether the chip of a POTS board functions normally. If the POTS services are faulty and the loop line works normally, POTS user circuit tests can be used to test the functions (such as the ringing and power feeding) and some parameters (such as the feeding voltage and ringing voltage) of the board circuit to check whether the circuit works normally.

Feature Dependency and Limitation

  • The to-be-tested POTS port must not be faulty.
  • Only one circuit test can be started on a POTS board at a time.

Test Procedure

  1. Maintenance engineers start a circuit test by using the NMS or running the pots circuit-test command.
    If users are making calls during a circuit test, maintenance engineers can cancel, forcibly perform, or delay the test based on actual conditions. If maintenance engineers forcibly perform the test, services on the port are interrupted and users' telephone services are affected. Therefore, exercise caution when performing this operation.
    NOTE:
    If maintenance engineers forcibly perform the test, services on the port are interrupted and users' telephone services are affected. Therefore, exercise caution when performing this operation.
  2. Maintenance engineers check whether the circuit is faulty based on the test results. The results of a circuit test include: Normal, Abnormal, and Not supported. Table 1-21 lists the specific test items and exception description of a circuit test.
    Table 1-21 Test items and exception description of a circuit test

    Test Item

    Exception Description

    Digital voltage

    Indicates the digital voltage. Users cannot make calls if this item is abnormal.

    Low power supply voltage (negative)

    Indicates the low-voltage power supply (negative) to the POTS chip. The power consumption of the board increases if this item is abnormal.

    High power supply voltage (negative)

    Indicates the high-voltage power supply (negative) to the POTS chip. Users cannot make calls or the ringing tone is irregular if this item is abnormal.

    Positive power supply voltage

    Indicates the high-voltage power supply (positive) to the POTS chip. The ringing tone is irregular if this item is abnormal.

    Off hook detective

    Indicates the off-hook detection function of the POTS chip. Users cannot make calls if this item is abnormal.

    On hook detective

    Indicates the on-hook detection function of the POTS chip. Users cannot make calls if this item is abnormal.

    A->B feeder voltage

    Indicates the output voltage of the POTS chip. The call quality may be impaired if this item is abnormal.

    A->ground feeder voltage

    B->ground feeder voltage

    A->B antipole voltage

    Ringing current voltage

    Indicates the output ringing voltage of the POTS chip. The ringing tone is excessively low if this item is abnormal.

    Ringing current frequency

    Indicates the output ringing frequency of the POTS chip. The ringing tone is irregular if this item is abnormal.

    Vertical current between A and B

    Indicates the output voltage of the POTS chip. The call quality may be impaired if this item is abnormal.

    SLIC temperature

    Indicates the temperature of the SLIC. The SLIC will be locked and the call will be interrupted if the SLIC temperature is abnormal.

    Stop ringing

    Indicates the ringing stopping frequency of the POTS chip. Users can hear the ringing tone, but cannot communicate with the peer party after picking up the phone if this item is abnormal.

    Loop current

    Indicates the output current of the POTS chip. The call quality may be impaired if the output current is lower than 18 mA.

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Updated: 2019-02-22

Document ID: EDOC1100067358

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