User's Manual

APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide Preliminary May 9, 2000 3-1
3
Configuring the Thermal Profile for Fan
Tray Operations (APX 8000)
Overview of the Thermal profile for fan tray operations
On the APX 8000, an on-board digital temperature chip on the shelf controller and a
temperature device at the intake end of the fan controller are used to measure incoming
ambient air temperature. The APX 8000 fan tray is capable of running at different speeds, and
of adjusting as needed to dissipate system heat or reduce unnecessary fan noise.
You control fan tray operations by configuring the Thermal profile. Following are the relevant
settings, shown with default values:
[in THERMAL]
fantray-lownoise-rpm = 2500
operation-mode = full-speed-only
low-temperature-trigger = 34
high-temperature-trigger = 40
alarm-temperature-trigger = 55
Overview of the Thermal profile for fan tray operations. . . . . . . . . . . . . . . . . . . . . . . . 3-1
Thermal status reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Parameter Specifies
Fantray-Lownoise-RPM Number of revolutions per minute (RPM) of the fan tray when
the low noise speed has been selected. Valid values range from
2000 to 3000, with a default of 2500.