When you view the alarm in the network management, select the alarm, and the related parameters of the alarm will be displayed in the "Alarm Details". The format of alarm parameters is "Alarm Parameters (hexadecimal): Parameter 1 Parameter 2...Parameter n". See the following table for the meaning of each parameter.

Generation of this alarm indicates that the tributary board is not loaded with services (VC-12: V5[b5 to b7], VC-3: C2) in the net load of the lower-order channels sent by the receiving counterpart from the crossover side, and the service will be interrupted.

The following are possible causes of the LP_UNEQ alarm:

• Cause 1: The PDH side is not properly connected to the service.
• Cause 2: V5 and C2 bytes are configured as "0x00".

1. Query the alarm on the network management. Determine the channel number that generates the alarm according to the alarm parameters. For details, see Browsing the Current Alarms of Network Elements in Task Set.
2. Cause 1: The PDH side does not access the service correctly.
   1. Along the direction of service flow, query upstream the network element that uploads low-order services and check whether the corresponding channel on the PDH side of the network element is accessing services. As shown in Figure 1, the NE1 network element branch unit uploads low-order services.

      If ......	then ......
      services are not configured.	The service is correctly configured. See the Configuration Guide for the steps to configure the service.
      Having configured the service, the	Continue to the next step.

   2. Check that the corresponding channel service type is configured correctly.

      If ......	then ......
      the business type is incorrectly configured.	Modify the incorrect configuration. Query whether the alarm is eliminated. If the alarm is not removed, continue to the next step.
      The business type is configured correctly.	Continue to the next step.

   3. Check whether the configuration parameters of the service-related tributary board attributes in the network management are correct, such as the channel service type and channel impedance parameters are configured incorrectly. If the parameters are configured incorrectly, reconfigure the relevant parameters according to the actual service type of the channel or the actual impedance of the single board. For specific operations, see "Hardware Description" to check the parameters of the single board. Check whether the alarm is eliminated. If the alarm is not eliminated, go to 3.
3. Cause 2: V5 and C2 bytes are configured as "0x00".
   1. Along the direction of service flow, query upstream the network element that uploads low-order services, and the source single board of this network element is the source end of V5 and C2 bytes sent.
   2. According to the level of service configuration, check the corresponding overhead byte.

      If ......	then ......
      the low-order business level is configured as VC3 only.	Continue to the next step.
      The low-order business level is configured as VC12 only.	Go to 3.e.
      Low-order business levels configured as VC3, VC12.	Continue to the next step.

   3. Check that the C2 byte configuration is "0x00" for this network element should be sent.

      If ......	then ......
      the C2 byte configuration is "0x00".	Reconfigure the C2 overhead byte according to the actual service type. For details, see Configuring the C2 Byte in the Task Set.
      C2 byte is not configured as "0x00".	Continue to the next step.

   4. Check if this network element is configured for VC12 level low order services.

      If ......	then ......
      the low-order service is also configured with the VC12 level.	Continue to the next step.
      The low-order service is not configured with a VC12 level.	Query whether the alarm is canceled. If the alarm is not canceled, contact Huawei engineers to handle the issue.

   5. Check whether the V5 byte configuration of this network element is "0x00".

      If ......	then ......
      V5 byte configuration is "0x00".	Continue to the next step.
      The V5 byte is not configured as "0x00".	Contact Huawei engineers to handle the issue.

   6. Select the corresponding board in the Network Element Manager, and then select "Configuration > Overhead Management > VC12 Channel Overhead" in the Function Tree.
   7. Click the Signal Flags tab. Configure the value of V5 bytes to be sent according to the actual service situation.
   8. Query whether the alarm is canceled. If the alarm is still not canceled, contact Huawei engineers.