Cisco Catalyst 2900 XL Series Installation And Configuration Manual page 21

LED Description
The indicator on the front panels of the SM-MR and SM-LR Fiber modules illuminates in
two-colors to indicate the operating status of the modules. The LED is described in
Table 1-2.
Table 1-2
Color
Green
Flashing green
Amber
Off
ATM SM Fiber Modules LED Description
Operating Status
The module port is connected to an operational ATM switch at the remote
end; it is steady when there is no activity.
The module is transmitting or receiving data. The LED flashes rapidly
when the traffic level is high.
The module is disabled because it did one of the following:
• Responded to an administrative action
• Encountered a secure address violation
• Failed the power-on self-test (POST)
The module is not connected to the ATM network of the Catalyst 2900
series switches or another ATM device.
ATM 155 SM Fiber Modules
Overview 1-9