The LWX board of the OptiX Metro 6100 reports a TP_LOC alarm because no service is input to the board.
Cause Analysis
The TP_LOC alarm indicates a loss of the transmitter PLL clock.
No service is input to the client side of the LWX board at the local station and the Automatic Laser Shutdown of the board is Disabled. This indicates that the laser of the LWX board is forced to emit light and thus there is no signal code stream in the WDM-side wavelengths. The LWX board at the opposite station cannot lock the clock and thus reports the TP_LOC alarm.
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