Configuring the Thermal Profile for Fan Tray Operations (APX 8000)

Overview of the Thermal profile for fan tray operations

admin> write THERMAL written

admin> list [in THERMAL]

fantray-lownoise-rpm = 2500 operation-mode = auto-regulation low-temperature-trigger = 30 high-temperature-trigger = 37 alarm-temperature-trigger = 50

Related log messages

When the fan tray is in auto-regulation mode, the system can generate the following Info log messages to indicate that the system has switched the fans from low noise to full speed, or vice versa:

LOG info, Shelf 1, Slot 42, Time: 10:31:39--

Fantray now running in lownoise-mode (30 C)

LOG info, Shelf 1, Slot 42, Time: 10:34:40--

Fantray now running at full speed (37 C)

If you modify the fan operation mode setting in the Thermal profile, the system generates an Info log message such as the following:

LOG info, Shelf 1, Slot 42, Time: 11:06:44--

Fantray set to run in Auto-regulation mode

Thermal alarms

When the temperature of the system reaches the Alarm-temperature-trigger threshold specified in the Thermal profile, the system is in an alarm state. When this happens, the following events occur:

The system generates an Error log message such as the following:

LOG error, Shelf 1, Slot 42, Time: 11:10:23-- Temperature Alarm triggered (50 C)

The Alarm relay on the shelf controller is enabled. This turns on whatever signal is connected to the Alarm relay on the shelf controller.

The Alarm status light in the fan tray front panel turns ON.

When the temperature falls back 2 degrees Celsius below the Alarm temperature trigger threshold, the alarm state is cleared and the following events occur:

The system generates a Warning log message such as the following:

LOG warning, Shelf 1, Slot 42, Time: 11:11:33-- Temperature Alarm cleared (48 C)

The Alarm relay on the shelf controller is disabled.

The Alarm status light in the fan tray front panel turns OFF.

The 2-degree temperature cushion retards system response slightly so that the Alarm state is not triggered repeatedly around a threshold.

APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide

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Lucent Technologies 7820-0802-003 manual Related log messages, Thermal alarms