GPON Repeater Operation Manual
Chapter 6 Precautions
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Chapter 6 Precautions
6.1. Precautions
The optical fibers of the single board are straight out; please do not look directly at the core of the
optical module, so as to prevent laser from burning eyes.
6.2. Maintenance of Single Boards
Fault Location Method
In case that failure such as business interruption or optical power instability occurs, the following
steps are usually used to locate the fault:
1. Check and adjust the optical fiber connection. If the service returns to normal, the fault will be
solved. If the optical fiber connection is normal, please continue with the next step.
2. Check and adjust the input optical power of the local and the opposite ends of the single board. If
the service returns to normal, the fault will be solved. If the input optical power is normal, please
continue with the next step.
3. Equipment failure, please replace the equipment.
Troubleshooting
Table 0-1 Single Board Maintenance--Troubleshooting
Item
Fault Causes
ONU cannot be
registered.
Cause 1: OLT is not connected with ONU equipment.
Cause 2: The receiving optical power of the optical module exceeds the threshold range
(-8dBm~-27dBm).
Cause 3: The optical interface is not clean.
Cause 4: Business interruption due to inconsistent types of interworking services.
Cause 5: Equipment failure.
Error Code of
Equipment
Cause 1: The receiving optical power is abnormal.
Cause 2: The aging and bending of the tail fibers between and the client and the user leads.