Differences between ODU_SNCP_STA_INDI and ODU_SNCP_PS

ODU_SNCP_STA_INDI and ODU_SNCP_PS alarms have different principles and generation causes. The ODU_SNCP_STA_INDI alarm is used to indicate a fault. This alarm is reported upon an interruption of a protection group channel, regardless of whether there is service protection switching or whether the services are on the working channel or protection channel. The ODU_SNCP_PS alarm is used to indicate the protection switching status. This alarm is reported upon protection switching, regardless of whether the protection group channel is interrupted. For example, after a user issues an external switching command, the ODU_SNCP_PS alarm will be reported even though both the working channel and protection channel are normal.

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