APR
Table 1: Alarm Details
Parameter | Description |
|---|---|
Code | apr |
Description | Automatic Power Reduction: For safety reasons, the local port has automatically reduced laser power. For more information about APR, see the BTI7800 Series Software Configuration Guide. |
Entities Affected |
|
Possible Cause | A fiber cut has been detected. |
Default Severity | Critical |
Service Affecting | Yes (true). |
Alarm Clearing | See: |
Related Fault Hierarchy | See: |
Table 2: DOL Ports
Entity Name | Fault Indicator | ||
|---|---|---|---|
Module | Indicator | Status | |
port:<chassis>/<slot>/1/PRE | PRE | Fault LED, PRE port | On |
Table 3: Terminal Amplifier Ports
Entity Name | Fault Indicator | ||
|---|---|---|---|
Module | Indicator | Status | |
client:<chassis>/<slot>/1/<portNum> | AMP1 | Fault LED, DCM port | On |
dcm:<chassis>/<slot>/1/<portNum> | Fault LED, C1 port | ||
Clearing an APR Alarm (PRE Port)
 | Note: Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide. |
- Check for a LoLightRx alarm on the host module's PRE In port.
- Inspect the fiber at the following locations, and ensure
that the fiber is intact, thoroughly clean, and correctly connected:
- Between the PRE module's Out port and the host module's PRE In port.
- Between the host module's PRE Out port and the PRE module's In port.
- Check for alarms on the PRE port.
- If the alarm has cleared, you have completed this procedure.
- If the alarm does not clear, contact your next level of support.
Clearing an APR Alarm (terminal Amplifier Port)
| Note: Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide. |
- Do one of the following:
- If the alarm is raised against the client Out port, retrieve
statistics for the port to view the values of the
APR optical backreflection
and
Optical power transmitted counters.
show statistics current client:identifier - If the alarm is raised against the DCM Out port, check for a LoLightRx alarm on the DCM In port.
- If the alarm is raised against the client Out port, retrieve
statistics for the port to view the values of the
APR optical backreflection
and
Optical power transmitted counters.
- Inspect the fiber, and ensure that it is intact, thoroughly clean, and correctly connected.
- Check for alarms on the terminal amplifier line port.
- If the alarm has cleared, you have completed this procedure.
- If the alarm does not clear, contact your next level of support.
