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30 C
HAPTER
2: I
NSTALLING
THE
S
WITCH
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 MM 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 MM
Table 4
LED colors
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.
16985ua.bk Page 30 Thursday, September 7, 2000 9:15 AM