Comba Telecom ComFlex-6900, User Manual

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USER MANUAL FOR COMFLEX-6900
ENU STATUS : 1-0-0 Copyright - refer to title page Page 62
Table 13: RU Alarm List
Alarm List Alarm Condition
External Alarm

Alarm status when the external terminals have the same H/L level with alarm
level, otherwise normal;

Alarm period: 10s by default.
Over-Temperature
Alarm

Alarm when equipment temperature is higher than the threshold, otherwise
normal;

Alarm judgment period: 3 minutes by default;

Alarm threshold : 80
℃
by default.
Optical Tx Alarm

Alarm When optical transmiting power is lower than the threshold, otherwise
normal;

Alarm judgment period: 3 minutes by default;

Alarm threshold: 0dBm by default.
Optical Rx Alarm

Alarm When optical receiving power is lower than the threshold, otherwise
normal;

Alarm judgment period: 3 minutes by default;

Alarm threshold: -14dBm by default.
PA Alarm

Alarm when any one of the PA Current Alarm,PA Over-temperature Alarm,
PA DL output power overload Alarm, Reflection Power Alarm happens,
otherwise normal;

Alarm judgment period: 3 minutes by default.
DL Output
Overload Alarm

Alarm when the DL output power is higher than the threshold, otherwise
normal;

Alarm judgment period: 3 minutes by default;

Alarm threshold: 48dBm.
Shutdown Alarm

Alarm when the PA status is off, otherwise normal;

Alarm judgment period: 10s by default.
LNA Alarm

Alarm when LNA have problems, otherwise normal;

Alarm judgment period: 3 minutes by default.
6.2 TROUBLESHOOTING
Following installation and commissioning, occasional operation tasks to handle alarms may be required:
Table 14: MU Alarms Diagnosis
Alarm condition Diagnosis
Over-
Temperature
alarm

Check device temperature on WEB GUI

If device temperature is over threshold, make sure environment temperature
is within the envireonment temperature range that MU supported (0~40
℃
).
Apply climatic protection to the system under severe environment.
Optical TX Alarm

Test MU transmit optical power

Replace FOU if transmit optical power is less than -7dBm
Optical RX Alarm

Use Optical Power Meter to test received optical power

If received optical power is lower than -10dBm, test whether RU transmit
optical power is normal (3~5dBm)

Check if optical loss of fiber link is higher than 6.5dBo

Clean fiber connector with absolute ethanol
DL Input Power
Overload Alarm Test DL input power of MU, if it is higher than +33dBm, choose proper coupler to
ensure the input power to MU is lower than +33dBm.