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Cisco 1600 Series Router Hardware Installation Guide

Rear Panel LEDs

A-14

Rear Panel LEDs

Table A-4 describes the rear panel LEDs. For illustrations of these LEDs and the rear panel

of the routers, refer to Figure 1-2 through Figure 1-5 in the “Overview of the Router”

chapter.

Table A-4 Rear Panel LED Functions

LED Color Description

All Models

LNK

(next to ETHERNETØ 10BASET)

Green Indicates 10BaseT link integrity. This LED is not on when

connected to an Ethernet network through the AUI port.

The Cisco 1605 has two LNK LEDs, one for each Ethernet

10BaseT port.

(next to FLASH PC CARD slot)

Green The Flash PC card is correctly installed.

Cisco 1601

RDY Green A serial port cable connection has been made to a modem or

DSU/CSU.

Cisco 1602

LOOPBACK Yellow The DSU/CSU is in DSU or CSU loopback mode.

ALARM Yellow An alarm condition exists on the DSU/CSU port.

CARRIER Green Indicates line synchronization or connection on the DSU/CSU

port.

Cisco 1603

(next to ISDN BRIØ S/T port)

Green A physical connection has been established with the ISDN

central ofﬁce switch.

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Cisco 1600R Installationsanleitung Seite 62