TU pointer adjustment event

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Question:
Does a TU pointer justification event detected on a lower-order channel of the local station mean pointer justification on the local station? Why?
Answer:
When the local station detects a TU pointer justification event on a lower-order channel, it does not mean that pointer justification occurs at the local station. Instead, it means that pointer justification occurs at the remote station corresponding to the lower-order channel. Pointer justification occurs during lower-order channel multiplexing into the AU. To be specific, pointer justification occurs in upstream signals. However, pointers are explained in downstream signals, or at the receive end. Therefore, the pointer justification at the local station can be detected only at the remote station. When the local station detects a pointer justification event, the pointer justification occurs at the remote station.

Other related questions:
SDH TU pointer
The TU pointers point to the four multiframes V1, V2, V3, and V4.

What is the definition of an event list
The trace list displays details about operations, such as creation, modification, and deletion of cloud service resources, by a tenant. The trace list contains traces generated during the last 7 days.

Reasons for pointer justification on an SDH line board
Reasons for pointer justification on an SDH line board: The reason why pointer justification occurs on an SDH line board is that NE clocks are not synchronized. When the rate (frame rate) of VC-4 is higher than that of AU-4, a negative pointer justification occurs. When the rate of VC-4 is lower than that of AU-4, a positive pointer justification occurs.

Description of LWX board switching event parameters
When the board is automatically switched, the switching status is reported. Then the NE records the SWITCH_CHANNEL event. The parameters are described as follows: Original working channel + Original switching request + New working channel + New switching request. For 0x00 0x00 0x00 0x0c, the first 0x00 indicates the working channel; the second 0x00 indicates no switching; the third 0x00 indicates the working channel; 0x0c indicates SF switching.

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