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TCX1000 Hardware Alarm Types and Behavior

 

This topic describes the various types of alarms and their behavior on TCX1000 devices.

Optical Power Alarms

The TCX1000-RDM20 and TCX1000-ILA support the following optical power alarms.

Input/Output Low Degrade Alarms

These alarms indicate that the optical power measured on the port or interface has dropped below the Input/output Low Degrade Threshold value. To clear this fault, an optical input power equal to the Input/output Low Degrade Threshold plus the Input/Output Low Degrade Hysteresis must be restored at the port or interface.

Input/Output Overload Alarms

These alarms indicate that the optical power measured on the port or interface has exceeded the Input/output Overload Threshold value. To clear this fault, an optical input power equal to the Input/output Overload Threshold minus the Input Overload Hysteresis must be restored at the port or interface.

Loss of Output (LOO) Alarms

LOO alarms indicate that the optical power measured on the port or interface has dropped below the Loss of Output threshold value. To clear this fault, an optical power equal to the loss of output threshold plus the loss of output hysteresis must be restored at the port or interface.

Loss of Signal (LOS)

LOS alarms indicate that the optical power measured on the port or interface has dropped below the Loss of Signal Threshold value. To clear this fault, an optical input power equal to the Loss of Signal Threshold plus the Loss of Signal Hysteresis must be restored at the port or interface.

Temperature Alarm Behavior

When the card temperature Out-Of-Range alarm is asserted, it indicates that the TCX1000 ambient temperature sensor has gone significantly outside the design operating range. The TCX1000 will continue to remain fully operational on a best effort basis under these conditions, however performance may fall outside of specifications. No TCX1000 system will be automatically shut down under these circumstances, however if ambient temperature climbs high enough the power modules will eventually shut off. This can be expected to happen in the range of 65-70° C ambient.

The TCX1000-RDM20 and TCX1000-ILA contain internal heating elements for stabilizing various optical components. These have over-temperature protection on an individual basis that is not tied directly to the card temperature alarm. Overheating of any of these elements can lead to the affected heater being shut down. This will be alarmed as a service or non-service affecting hardware failure as appropriate.