3Com 1000BASE-SX - Manual (Page 16)

16 9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
Verifying Module
Operation
The 9-port GEN Layer 2 Switching Module has one Module Status LED
and nine Port Status LEDs on its front panel.
Watch the LEDs during the system power-on diagnostic test to verify
proper module operation:
■
On the Module Status LED, the normal power-on diagnostic test
sequence is Green – Yellow – Green – Flashing Green (while running
the diagnostic test) – Green
If the Module Status LED is yellow after the diagnostics run, the module
has failed.
■
The Port Status LEDs are tested during the diagnostic test. The normal
test sequence is Yellow – Green – Off.
Table 6 describes the LED colors and states.
Table 6 Module and Port Status LED Indicators
LED State or Color Definition
Module Status Green Power is on (normal operation).
Flashing Green Diagnostics or software download
is in progress.
Yellow Diagnostic failure.
Off After initial insertion or module
reset, the LED remains unlit for
approximately 3 seconds. At other
times, an unlit LED indicates that
the module is not receiving
power.
Port Status Green Port is enabled and link is up.
Flashing Green Port is receiving or transmitting
packets.
Yellow Module or port is malfunctioning.
Off Port is disabled or link is down.