1-5
Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
OL-21561-02
Chapter 1 Product Overview
Features
RESET switch
(both chassis)
• Resets and restarts the switch.
• The switch is recessed on chassis front panel and requires a pointed
object to access it.
Fan tray
Catalyst 4948E chassis
• The Catalyst 4948E chassis supports one hot-swappable fan tray (part
number WS-X4993=).
Note The fan trays are not interchangeable between the Catalyst 4948E
and the Catalyst 4948E-F chassis.
• The fan tray has four variable-speed 12 VDC fans.
• The fan tray installs in the rear of the chassis between the two power
supplies.
• The fan tray for the Catalyst 4948E (WS-X4993=) is color-coded dark
grey.
• A redundant pair of thermal sensors are positioned near the air inlet
(front of the chassis) to monitor the ambient air temperature and control
the fan tray fan speed.
• The airflow in the Catalyst 4948E chassis is from front to back.
• The chassis has a FAN LED (located on the chassis front panel) that
provides fan tray status.
–
Red—One or more individual fans in the fan tray have failed.
–
Green—All fans in the fan tray are operating normally.
Catalyst 4948E-F chassis • The Catalyst 4948E-F chassis supports one hot-swappable fan tray (part
number WS-X4993-F=).
Note The fan trays are not interchangeable between the Catalyst 4948E
and the Catalyst 4948E-F chassis.
• The fan tray has four variable-speed 12 VDC fans.
• The fan tray installs in the rear of the chassis between the two power
supplies.
• The fan tray for the Catalyst 4948E-F is color-coded blue.
• A redundant pair of thermal sensors are positioned near the air inlet (rear
of the chassis) to monitor the ambient air temperature and control the fan
tray fan speed.
• The airflow in the Catalyst 4948E-F chassis is from back to front.
• The chassis has a FAN LED (located on the chassis front panel) that
provides fan tray status.
–
Red—One or more individual fans in the fan tray have failed.
–
Green—All fans in the fan tray are operating normally.
Table 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features (continued)
Feature Description