13 / 18
Fiberroad may make changes at any time to the products or specifications contained herein without notice
Fiberroad is trademarks of Fiberroad technology Co.,Ltd.©2021 Fiberroad technologu co.,ltd All right reserved
Chapter 3 Troubleshooting Procedures and principles
This chapter describes the troubleshooting procedures and principles.
In actual application, various troubleshooting methods should be used flexibly, based on the
general principles mentioned below.
Maintenance Requirements
You must be familiar with the functions of the different equipment components and
maintenance operations. This includes the functions of specific modules, various alarms and
features, work-mode and service configurations.
Transport equipment is not isolated but correlated with other components, You should have
knowledge of the network topology, network protection structure, clock tracing relationship,
add/drop service, network setting, element management system access methods, etc.
Common Causes
1. External faults
Power supply faults: power failure, under-voltage, etc.
Inter-connected equipment faults, such as faulty switch
Poor grounding and/or connection signal deterioration
Optical or electrical cable faults: signal deterioration and high signal loss; cable cut by
underground digging; frost damage; broken cables’ poor contact; cold solder connections or
un-soldered connections.
2. Equipment faults
Packer Loss
External Cause
Poor grounding or no joint grounding
Low optical power due to over-exhaustion of optical cables
Electrical cable damage or poor cable connection contact
Equipment Faults
Faulty optical interface module-faulty transceiver
Clock precision faults or poorly-synchronized system
Equipment temperature out of normal range
Faulty module, causing coordination problems with other modules
Common solutions
Query alarms and performance data and follow the packet loss generation and feedback
principle.
Correction Procedures
Exclude external causes
Check for proper grounding, optical cable connections, optical power reception within the valid
range, and equipment temperature.
Observe the interface module for error bits.
For instance, when there are error bits on the interface modules, it is possibly caused by poor
To Next Page
Loading...