3Com SuperStack II 3000 TX, User Manual

Page: 15 / 144

Unit Overview — Front 1-7
100BASE-TX Ports
The Switch 3000 TX has eight Fast Ethernet
100BASE-TX RJ45 ports configured as MDIX
(cross-over), which provide connection to other Fast
Ethernet devices such as the SuperStack II Switch
1000. The maximum segment length is 100m
(328ft) over category 5 UTP or STP cable.
As these ports are configured as MDIX (cross-over),
you need to use a cross-over cable to connect to
devices whose ports are MDIX-only. Most of the
100BASE-TX ports in 3Com devices are MDIX-only.
LEDs
Table 1-1 describes the LED behavior on the Switch
3000 TX. For more details about corrective action in
the event of a problem, refer to
“LEDs” on page
C-1 .
Table 1-1 LED behavior
LED Color Indicates
Port Status LEDs (ports 1 – 8)
Packet Yellow Frames are being transmitted/received
on the port.
Status Green Link is present; port is enabled.
Green flashing Link is present; port is disabled.
Off Link is not present.
Plug-in Module Status LEDs (port 9)
Packet Yellow Frames are being transmitted/received
on the Plug-in Module port.
Status Green Link is present; port is enabled.
Green flashing Link is present; port is disabled.
Green flashing
(long on, short off) Refer to the “ SuperStack II Switch ATM
OC-3c Module User Guide”.
Yellow Plug-in Module has failed its Power On
Self Test (if the MGMT LED is flashing
yellow), or the agent software of the
Plug-in Module is not installed correctly.
Yellow flashing Plug-in Module is not recognized.
Off Link is not present or the Plug-in Mod-
ule is not installed in the Switch.
Unit Status LEDs
Power Green Switch is powered-up.
MGMT Green Switch is operating normally.
Green flashing Switch or Plug-in Module is either
downloading software or initializing
(which includes a Power On Self Test).
Yellow Switch has failed its Power On Self Test.
Yellow flashing Plug-in Module has failed its Power On
Self Test.