Hardware Installation Manual  24  Document #: LTRT-28030 
3.3.4  LED Descriptions 
This section describes the LEDs on the rear panel of the chassis. 
3.3.4.1  Ethernet LEDs 
Each Ethernet port on the CPU module provides a LED (located on its left) which indicates 
network connectivity status, as described in the table below. 
Table  3-11: Ethernet LEDs Description 
Color  State  Description 
Green 
On  Ethernet link established. 
Flashing  Data is being received or transmitted. 
- 
Off  No Ethernet link. 
 
3.3.4.2  STAT LED 
The STAT LED on the CPU module indicates the operating status of the CPU module, as 
described in the table below. 
Table  3-12: STAT LED Description 
Color  State  Description 
Green 
On  LED lit as a result of one of the following: 
  Device is operating normally  
  During first stage of boot up when device is powered on 
Orange 
On   Chassis is approaching high temperature threshold, but not 
yet critical 
Red 
On  LED lit as a result of one of the following: 
  Fault detected in CPU module 
  Incompatible or faulty software version (.cmp file) 
detected during boot up  
  Approaching critical high temperature threshold 
- 
Off  No power.