Allied Telesis AT-SBx81CFC960 - Manual (Page 68)

Chapter 3: AT-SBx81CFC960 Controller Fabric Card
68 Section I: Hardware Overview
eco-friendly Button
You may use the eco-friendly button on the controller card to turn the
LEDs on or off. You may turn off the LEDs when you are not using them to
monitor the control and Ethernet line cards, to conserve electricity. When
the LEDs are off, the overall power consumption of the chassis is slightly
reduced, approximately 3 watts in a system with 240 active copper ports.
The button controls all of the port LEDs on the Ethernet line cards and
controller card, except for the CFC LED, which is always on, and the L/A
LED for the NET MGMT port. The button does not control the LEDs on the
fan module and power supply systems.