Whether LP_UNEQ is a condition for SNCP switching

Question:
According to ITU-T suggestions, the standard LP_UNEQ alarm is inserted if no lower-order service is configured. However, some OSN devices cannot detect the LP_UNEQ alarm for triggering SNCP switching. Why?
Analysis:
Board hardware restrictions. Some boards can be upgraded to resolve the problem, whereas some cannot.
Answer:
No version of SSN1GXCSA, SSN1EXCSA, or SSQ1CXL supports LP_UNEQ detection.

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