3Com 3C16980 User Guide - Page 30

30 CHAPTER 2: INSTALLING THE SWITCH Choosing the Correct Cables Table 4 LED colors Color Green Yellow Off State The Switch is powered-up and operating normally The Switch has failed its Power On Self Test. This occurs if any of the ports fail during power-up. The Switch is not receiving power. If there is evidence of a problem, see "Solving Problems Indicated by LEDs" on page 31. All of the ports on the front of the Switch 3300 are configured as MDIX (cross-over). If you want to make a connection to another MDIX port, you need a cross-over cable. Most of the 10BASE-T and 100BASE-TX ports on 3Com devices are MDIX-only. Many ports on workstations and servers are configured as MDI (straight-through). If you want to make a connection to an MDI port, you need to use a standard straight-through cable. This is illustrated in Figure 10. Figure 10 Connecting other devices to the Switch 3300