Detailed View of the LEDs and the Management Ports Reset Button A Reset button on the front panel of the Catalyst 4912G switch allows you to manually reset the switch. The Reset button is recessed and can be activated by using a pointed object. The system fan assembly provides cooling air for the internal chassis components. The fans exhaust air from the rear and fresh air is drawn in from the front of the chassis. Figure 2-3 shows the direction of airflow in and out of the switch.
Sensors monitor the internal air temperatures.
If the air temperature exceeds a desired threshold, the environmental monitor displays warning messages. To order an RPSU for a Catalyst 4912G, consult the Cisco Product Catalog. A power cord is used to connect the power supplies to the site power source. The RPSU can be configured to provide redundant power supply protection. The RPSU contains redundant power supplies.