Module
LED
State
Internal
Module 1/2
Link
Steady green - normal optical link level
Blinking green – low optical link level
Off – optical link level is below the no link threshold
Run
Blinking green – input power detected in module
Off – no power input
PSU
Run
Steady green – required power input detected
Off – no power input
PSU
Off – normal operation
Steady red – faulty PSU module; In more than 10 percent difference than the rated
DC output, the red LED occurs.
Module
State
Description
Run
Steady green
Off
Power input detected
Unit power is off
Comm
Green
Short blink upon receiving FSK message
(Off at any other time)
Link
Steady green
Blinking green
Off
Optical link level is above normal threshold
Optical link level is lower than normal threshold but above no-link threshold
Optical link level is below no link threshold
Status
Green/Yellow/Red
Color according to device’s overall status
Service
Green
Red
Service status is ok
Any service alarm is set
Ant.
Green
Red
VSWR alarm is clear
VSWR alarm is set
Temp.
Green
Red
Over Temp and Temperature Protection alarms are clear
Over Temp or Temperature Protection alarms is set
T-Sync
Green
Red
TDD sync locked
TDD sync error (unlocked)
Fan
Green
Yellow
Red
Fan alarm is clear
Fan alarm is set (minor) for first fan faulty
Fan alarm is set (minor or major) for more than one faulty fan
11. VERIFY NORMAL OPERATION STATUS VIA
PSU, INTERNAL MODULES, AND RCU LEDS
Referring to Figure 17 and verify that the HX 2.5 GHz TDD LEDs
indicate normal operation according to Tables 3 and 4.
Figure 17. HX 2.5 GHz TDD Status LEDs
Quick Installation Sheet | CMA-481-AEN | Page 11
Corning Optical Communications
Table 3. HX 2.5 GHz TDD Internal Module and PSU LEDs
Table 4. HX 2.5 GHz TDD RCU Status LEDs