Probable reasons u a switchover between the active

Probable reasons
u A switchover between the active and the standby core switch card via the
ANM2000.
u A switchover between the active and the standby core switch card via the CLI.
u The active core switch card is unplugged, which causes the switching occurs in
the core switch card.
u The active core switch card is automatically and abnormally restarted, which
causes the switching occurs in the system.
Handling steps
1. Confirm whether the manual switching is performed via the ANM2000.
4
If the switching is executed manually, no handling is needed.
4
If the switching is initiated automatically, proceed to Step 2.
2. Check whether the active core switch card has faults:
4
If yes, replace the card.
4
If not, proceed to Step 3.
3. Please contact technicians of FiberHome.
9-2 Version: C

9 Prompt Events
9.1.2 Core Switch Card Status Change
Event information
Event Name Event Level
Core switch card status change Prompt Events
Influences on the system
This event does not influence the system.
Probable reasons
u Switching occurs in the active and standby HSWA card.
u The system is started.
Handling steps
No handling is needed.
9.1.3 UPLINK_INVERSION
Event information
Event Name Event Level
UPLINK_INVERSION Prompt Events
Influences on the system
This event does not influence the system.
Probable reasons
Manual switching or automatic switching occurs on an uplink port.
Handling steps
1. Check whether the switching for the uplink port is initiated manually:
4
If the switching is executed manually, no handling is needed.
4
If the switching is initiated automatically, proceed to Step 2.
Version: C 9-3

AN5116-06B Optical Line Terminal Equipment Alarm and Event Reference
2. Check whether the uplink port ’ s physical connection is normal:
4
If not, perform the connection again.
4
If yes, proceed to Step 3.
3. Check the optical module with an optical power meter:
4
If the optical module cannot receive and transmit the optical signals
normally, replace the optical module.
4
If the optical module works normally, proceed to Step 4.
4. Please contact technicians of FiberHome.
5. End.
9.1.4 SIGNAL_TRACE
Event information
Event Name Event Level
SIGNAL_TRACE Prompt Events
Influences on the system
This event does not influence the system.
Probable reasons
The signaling tracing function of the core switch card is enabled.
Handling steps
No handling is needed.
9.1.5 TIME_REQ
Event information
Event Name Event Level
TIME_REQ Prompt Events
9-4 Version: C

9 Prompt Events
Influences on the system
The equipment time is not synchronized with the NTP server time.
Probable reasons
Reconfigure the SNMP time mode in the ANM2000.
Handling steps
Execute the time calibration command:
1. In the ANM2000, right-click the AN5116-06B system in the Logical Tree pane
and select Config → Time Calibration in the shortcut menu.