Hardware Installation Manual  16  Document #: LTRT-28030 
3.2.1  LED Descriptions 
This section describes the LEDs on the front panel of the chassis. 
3.2.1.1  SYS LED 
The SYS LED indicates the device's operating status, as described in the table below. 
Table  3-3: SYS 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 
 
3.2.1.2  TEL LED 
The TEL LED indicates the status of the FXS blades, as described in the table below. 
Table  3-4: TEL LED Description 
Color  State  Description 
Green 
On  LED lit as a result of one of the following: 
  During booting up phase  
  During normal operation, indicating normal FXS blade 
operation 
Orange 
  At least one DSP has reached the high temperature threshold 
Red 
On  LED lit as a result of one of the following: 
  During initial phase of power-up  
  Failure detected in at least one FXS blade 
  No FXS blades detected in the chassis 
-  Off  No power.