Cisco 7120 Series User Manual page 13

Chapter 1 Overview
The Cisco 7120-AT3, Cisco 7120-AE3, and Cisco 7120-SMI3 WAN ports have one enabled LED and
three status LEDs. The LEDs are in the same location and labeled the same on each model. After system
initialization, the enabled LED goes on to indicate that the port has been enabled for operation. If the
initialization fails for any reason, the enabled LED will not go on. The LEDs are shown in
and described in
Figure 1-14 Cisco 7120-AT3 WAN Port LEDs
EN
5
I
RX
EN
CEL CAR ALM
Table 1-4
LED Label
EN
RX CEL
RX CAR
RX ALM
78-6341-03
Table 1-4.
LEDs
RX
CEL CAR ALM
E3 TX RX
Cisco 7120-AT3, Cisco 7120-AE3, and Cisco 7120-SMI3 LED Descriptions
Color State
Green On
Green On
Green On
Red On
Function
Indicates the port is ready.
Indicates the port has received an ATM cell.
Indicates the port has detected a carrier on the receiver cable. For a
fiber-optic interface, this means that light is detected, and a valid
frame is detected.
Indicates the router detected an alarm condition.
Cisco 7100 Series VPN Router Installation and Configuration Guide
Cisco 7120 Series Overview
Figure 1-14
1-13