3Com 10/100BASE-TX, 100BASE-FX quick start Led

2010-Port 100BASE-FX and 20-Port 10/100BASE-TX Fast Ethernet Layer 2 Switching Modules Quick Start Guide

Verifying Module The 10-port 100BASE-FX FEN Switching Module has 10 Port Status LEDs Operation and the 20-port 10/100BASE-TX FEN Switching Module has 20 Port

Status LEDs. Each module has one Module Status LED.

Watch the LEDs during the system power-on diagnostics test to verify proper module operation:

■On the Module Status LED, the normal power-on 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 11 describes LED colors and definitions.

Table 11 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. Otherwise, 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.