Media Module Leds; Leds On The Stp Module - 3Com 3C780 - LinkBuilder FDDI Base Unit User Manual

5-16 Using the Hub
Reinitialize. If you press the RESET button only briefly, the hub reinitializes
and performs the power-on self-tests (POST). The tests take several seconds to
complete.
LED Check. If you hold down the RESET button, all functioning LEDs on all
installed modules light. This allows you to determine whether any LEDs are not
functioning. When you release the RESET button, the reinitialize function
begins.

Media Module LEDs

Each port connector on each module is equipped with three LEDs. The Signal
Detect LED indicates whether or not a received signal is present. The Port State
LED indicates the port's connection state. The Link Error LED indicates the
existence of a link error or a marginal connection. Figure 5-9 shows the
location of the LEDs on the STP module. The LED locations are the same on
the other media port modules. Table 5-10 interprets the meaning of the LED
colors.
Figure 5-9. LEDs on the STP Module
LED legend
GRN = SIGNAL DETECT
GRN = PORT STATE
YEL = LINK ERROR
®
PWR
Power (PWR) LED
Signal Detect
Port State
Link Error