In the non-converged OTU processing OTN standard signal scenario, both A and B are WDM sites, and the client side of the OTU at station A receives the RLOS signal; after processing the alarm at the…

In the non-converged OTU processing OTN standard signal scenario, both A and B are WDM sites, and the client side of the OTU at station A receives the RLOS signal; after processing the alarm at the WDM side of the OTU, it is transmitted to station B The OTU WDM at station B will detect the ODUk PM AIS alarm and generate an SF event; trigger channel service switching. The alarm continues to be sent to the downstream client device of station B, and an ODUK_PM_AIS alarm is reported to the client device.