FIBERROAD FR8000 - Classification of Faults

To Next Page

To Previous Page

14 / 18

Fiberroad may make changes at any time to the products or specifications contained herein without notice

clock synchronization, check whether the clock settings are correct.

Fault locating

This section contains information about how to manage fault case by case.

Packets Loss

When any of the packets are found lost when testing with a network tester, locate the fault as

follows;

1. Increase the optical power of the optical port in the corresponding card;

2. Reconfigure the bandwidth

Service fails

If it is found that the service fails when testing with a network tester, locate the fault as follows.

1. Check whether the network tester is set correctly

2. View whether PortXC is set correctly

3. If you fail to locate the problem, contact the related engineer.

LOS Alarm Management

When a LOS alarm is raised, locate the fault as follows.

View whether the red LED on the card works or not, if not:

1. Check whether the fiber are normal and whether the fibers are connected correctly

2. Check whether the optical power is in the normal range or not

3. Perform self-loop (loopback) over LH/SH and check whether the optical works normal

Classification of Faults

Transport faults can be classified into three categories according to maintenance methods:

1. External faults

These include optical fiber faults and cable faults, such as broken cables/fibers, poor cable

termination, and lighting damage, any of which can cause a service interruption.

2. Equipment faults

These include both hardware and software faults.

Hardware faults include module failure and module malfunctions. Software faults include

coordination failure between modules, protocol processing errors and other problems that can

be solved by software upgrades.

3. Interconnection faults

Transport equipment carries a variety of services. This might causes interconnection

compatibility problems.

These faults may be caused by:

 Devices are not mutually grounded