The OTUk_LOM (Loss of Multiframe) alarm indicates a framing alignment issue and is generated when the Out Of Multiframe (OOM) state persists for at least 3 milliseconds. This rapid alarm triggering helps detect synchronization failures quickly, allowing prompt response to maintain network stability. HCIP-Transmission details this alarm behavior within OTN frame monitoring functions, highlighting the critical role of frame alignment in maintaining signal integrity across optical networks.
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