30 CHAPTER 2: INSTALLING THE SWITCH
If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 31.
Choosing the Correct Cables
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 y ou 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
Tab le 4 LED col ors
Color State
Green The Switch is powered-up and
operating normally
Yellow The Switch has failed its Power On Self
Test. This occurs if any of the ports fail
during power-up.
Off The Switch is not receiving power.
16980ua.bk Page 30 Friday, April 30, 1999 9:03 AM