3Com 2226 PWR User Guide - Page 12

12 CHAPTER 1: INTRODUCING THE BASELINE SWITCH Ports 25 and 26 are not configured to provide Power over Ethernet. The two SFP ports support fiber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high-capacity aggregated link backbone connection. SFP ports are numbered 25 and 26 on the Switch. When an SFP port is active, it has priority over the 10/100/1000 port of the same number. The corresponding 10/100/1000 port is disabled when an SFP transceiver is plugged in. (6) Power LED The Power LED shows the power status of the Switch. Status Green Off Flashing Green Yellow Meaning The unit is powered on and ready for use The unit is not receiving power: ■ Verify that the power cord is connected cor- rectly ■ If the unit still does not operate, contact your 3Com network supplier ■ Power-on self-test is in progress ■ Power-on self-test or loopback test failed. Switch is in fail-safe mode. (7) Duplex LEDs The second and fourth (bottom) row of Status LEDs, which are colored yellow, show the duplex status of the related ports. Status Off Yellow Meaning No link, link is not yet negotiated, or the port is operating in half-duplex mode The port is operating in full-duplex mode (8) Self-Adhesive Pads The unit is supplied with four self-adhesive rubber pads. Do not apply the pads if you intend to rack-mount the unit. If the unit is to be part of a free-standing stack, apply the pads to each marked corner area on the underside of the unit. Place the unit on top of the lower unit, ensuring that the pads locate with the recesses of the lower unit. Rear Panel (9) Power Supply The Switch automatically adjusts to the supply voltage. Only use the power cord that is supplied with the unit. (10) Recovery Button Use the Recovery button on the rear panel to reset the Switch to its factory defaults. For more informa-