Cisco Systems 78-14784-02 manual LED Functions, Color

Chapter 1 Product Overview

Router Overview

LED Functions

Table 1-3summarizes the functions of the LEDs on the routers.

Table 1-3 Functions of LEDs on the Cisco 831 Router and SOHO 91 Router

LED	Color	Function
PWR_OK	Green	On when DC power is being supplied to the router. The light blinks if an error
		occurs during boot-up.
WAN_LED_OK	Green	On when WAN Ethernet carrier detects status and connects to the digital
		subscriber line access multiplexer (DSLAM) successfully.
WAN_LED_RxD	Green	Blinks when WAN Ethernet receives data.
WAN_LED_TxD	Green	Blinks when WAN Ethernet transmits data. Off when no data is being
		uploaded.
E1 (port 1 of	Green	On when Ethernet 1 connects to the Ethernet interface successfully. Blinks
built-in switch)		when Ethernet 1 receives or sends data, or when data passes through
Status		Ethernet 1.
E2 (port 1 of	Green	On when Ethernet 2 connects to the Ethernet interface successfully. Blinks
built-in switch)		when Ethernet 2 receives or sends data, or when data passes through
Status		Ethernet 2.
E3 (port 1 of	Green	On when Ethernet 3 connects to the Ethernet interface successfully. Blinks
built-in switch)		when Ethernet 3 receives or sends data, or when data passes through
Status		Ethernet 3.
E4 (port 1 of	Green	On when Ethernet 4 connects to the Ethernet interface successfully. Blinks
built-in switch)		when Ethernet 4 receives or sends data, or when data passes through
Status		Ethernet 4.
LAN_RxD	Green	Blinks when built-in Ethernet switch receives data from the WAN port.
LAN_TxD	Green	Blinks when built-in Ethernet switch transmits data to the WAN port.

	Cisco 831 Router and SOHO 91 Router Hardware Installation Guide
78-14784-02		1-5