Reasons for pointer justification on an SDH line board

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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.

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

Whether universal line boards, TDM (SDH) boards, and packet boards can be used in a subrack in master-slave mode
The boards can be used in independent subracks only.

Method used to configure the timeslot mode when a universal line board carries SDH and packet services
When a universal line board carries packet services and SDH services, ODU Timeslot Configuration Mode can be set only to Assign random.

Whether SDH boards can be used in an OSN 8800 slave subrack
SDH boards can be used only in an independent OSN 8800 subrack, but cannot be used in a subrack in master-slave mode.

Whether the TDX board on the OSN 8800 can be interconnected with the SL64 board on an NG SDH NE
Yes, the two boards can be interconnected through STM-64 optical ports.

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