EXFO FG-750 - Manual (Page 189)

Operating Your RTU in OTDR Measuring Mode
Fiber Guardian 175
Managing Degraded Fibers
Managing Degraded Fibers
The degraded fiber handling strategy feature allows you to capture
unstable fiber conditions which were not captured on existing learning
processes, such as a fast reflectance change, or a mechanical stress that
can make loss to change on a minute or so time frame. If degradation
(fluctuating link) is observed continuously in a test setup of an optical
route, the link is skipped and no further tests are performed on it. This
process reduces the number of fault sync requests and improves
performance.
Note: The degraded fiber handling strategy can be disabled to capture fast
transient conditions. It is recommended to enable it for higher performance
and elimination of spurious faults (RTU) and alarms (EMS).
The degraded fiber handling strategy applies to test setup of monitoring
type only.
To enable/disable degraded fiber handling strategy:
1. From the main menu, select Configuration > Default System
Settings.
2. From the tree view, select System.
3. Click Edit to enable or disable the degraded fiber handling strategy.
Enabling or disabling degraded fiber handling strategy from the EMS
updates the factory settings on the RTU and not the individual current
default for each RTU.