Table 1-4 – Cisco 1751 User Manual

Page 23

1-7

Cisco 1751 Router Hardware Installation Guide

78-11258-04

Chapter 1

Cisco 1751 Router Overview

Front-Panel LEDs

Table 1-4

Front-Panel LEDs

LED

Color

Cards Supported

LED Meaning

PWR

Green

–

On when DC power is being supplied to the router.

Green

–

On when the router has successfully booted up and
the software is functional. This LED blinks during
the power-on self-test (POST).

Refer to

Table 3-1

in the

“Troubleshooting”

chapter

for information on how to use this LED for router
diagnostics.

ETH

ACT

Green

–

Blinks when there is network activity on the
Ethernet port.

COL

Yellow

–

Blinks when there are packet collisions on the local
Ethernet network.

SLOTØ

Green

ISDN

On when the first ISDN B channel is connected.

Serial and CSU/DSU

Blinks when data is being sent to or received from
the port. For the VIC-2BRI-ST-NT/TE, blinks when
data is being sent to or received from any of the B
channels.

2-port serial

VIC-2E&M

VIC-2FXO

VIC-2FXS

VIC-2BRI-ST-NT/TE

WIC1-ADSL