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Lolck

Table 1: Alarm Details

Parameter	Description
Code	lolck
Description	Loss of Lock: The optical channel cannot lock on to the encoded signal received.
Entities Affected	Optical channel interfaces (see respective table below).
Possible Causes	The encoding, modulation, or other configured parameter on the interface at the far-end NE does not match the configuration of the same parameter of the interface at the local NE. The signal-to-noise ratio is below specification.
Default Severity	Critical
Service Affecting	Yes (true).
Alarm Clearing	See Clearing a Lolck alarm.
Related Fault Hierarchy	See Common fault hierarchy - OTN and CBR ports.

Table 2: Optical Channel Interfaces

Entity Name		Fault Indicator
Entity Name	Module	Indicator	Status
och:<chassis>/<slot>/<2>/<1>/<subport.och>	UFM6	Fault LED, 200G line port	On

Note: Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

Retrieve information for both the local and far-end optical channel interfaces to view configuration data:
show interface och:identifier detail
Correct the configuration settings where required. For information, see the BTI7800 Series Software Configuration Guide.
Retrieve statistics for the local and far-end optical channel interfaces to view the values of all optical signal-to-noise ratio counters, and ensure that the OSNR is within specification.
show statistics current och:identifier
If required, improve the signal-to-noise ratio.
Check for alarms on the local interface.
- If the alarm clears, you have completed this procedure.
- If the alarm does not clear, contact your next level of support.