In fact, we are not unfamiliar with fiber-to-the-home technology, but such or other faults will occur during the use of fiber-to-the-home technology, which affects our actual use effect. So, what are the common faults of FTTH? What about the common faults of FTTH?
What are the common faults of fiber-to-the-home
source of failure
Analysis of the causes of the failure, the failure of the cable network fiber-to-the-home technology operation can be considered from two aspects.
On the one hand, users report for repairs. This is the main source of failure of the cable network fiber-to-the-home technology, and there is usually a corresponding customer service center. This type of fault is mainly manifested in slow network connection speed, unstable digital signal, and more feedback from users in use. Such faults affect user satisfaction to a large extent. Reduce the frequency of such failures.
On the other hand, the network management alarm. This kind of fault occurs in internal operators. Through the use of EPON technology, the staff in the network management equipment room can find the fault point in time, which is convenient for the staff to troubleshoot in time. The network management alarm failure reflects the advantages of the fiber-to-the-home technology of the wired network. It is necessary to continuously improve the alarm mechanism in use to improve the efficiency of network troubleshooting.
fault location
From the point of failure, the fiber-to-the-home technology of wired network is mainly concentrated in the following positions.
One is the feeder cable segment. This location is usually between the optical cross-connect box and the OLT in the equipment room, and usually includes trunk optical cables, optical splitters, etc. This is the part where the optical fiber of the wired network is prone to failure at the current stage.
The second is the distribution cable segment. In this section, the fault mainly occurs in the middle of the optical node and the optical switching box in the community. The equipment that is prone to failure includes optical splitter, distribution cable and ONU equipment.
The third is the home optical cable segment. Operational failures are also prone to occur in the optical nodes and user terminals of the cell. These parts mainly include EOC head-end/terminal equipment, home cables, distributors, etc. The staff need to focus on these parts that are prone to failures. Usually, when locating faults, maintenance personnel should fully consider the corresponding instructions of the wired network bandwidth network management, give priority to detecting nodes with emergency warnings, and analyze the causes of faults based on their own experience, so as to eliminate the fault source in time and restore users. normal use.
How to deal with common faults of FTTH
The ONU terminal cannot dial
Fault characteristics: During the user's use, although the ONU connection is normal, the dial-up Internet access function cannot be realized. From the point of view of the reasons, it may be caused by the following aspects:
First, the user name and password do not match, resulting in abnormal dialing;
Second, there is an error in the background support system, which cannot realize the authorization of the user. It is also possible that the user goes offline abnormally during the use process, and the redial is faulty;
The third is that the ONU itself fails, and the signal cannot be mediated normally.
These reasons will cause the ONU terminal to be unable to dial. When such a fault occurs, the staff should find the reasons from the above three aspects and restore normal dialing in time.
Abnormal optical power at the user end
Fault characteristics: The LOS light of the ONU optical port indicator on the user end is flashing, and the optical power of the SC connector at the end of the leather fiber is tested, and the result is -35dB. After checking the optical splitter again, it was found that the signal was not abnormal. After detailed investigation, it was found that the output end of the optical splitter was abnormal, resulting in a small output optical power. When this happens, switch the interface of the splitter to realize the normal operation of the ONU.
Mosaic of on-demand signal
Fault characteristics: When the user is using the broadband signal, there is no abnormality. When selecting a program, the screen appears mosaic. This situation is mainly checked from the following aspects:
One is that the on-demand programs appear mosaic, which is not the case for time-shifted programs. The reason for this situation may be due to the congestion of the bandwidth between the NAS storage servers, resulting in a peak on-demand.
The second is that a certain program has mosaics, but other programs do not. This may be caused by a problem with the film source during recording, or the streaming server exceeds the bandwidth range.
Third, mosaics appear in both on-demand and time-shifting. This phenomenon is mainly caused by IPQAM, which may be caused by the fact that the upstream switch of IPQAM exceeds the actual bandwidth, resulting in mosaics in the program.
Residential fiber optic cable segment failure
Judging from the actual situation, the frequency of failures in the home optical cable segment is relatively high. When the staff receives a repair call, they must first check the network management and the operation of the light spot in the repair area. If it is found that the light spot is not running smoothly, the method of distributing the optical cable section is adopted to analyze and troubleshoot the corresponding fault source. If there are other faults, the maintenance personnel should go to the user's site to check, so as to ensure the normal use of the user.
The above is all about the common faults of FTTH and how to deal with the common faults of FTTH. All in all, the development of FTTH technology in wired network has brought great convenience to the general public, but it cannot be used in the process of use. A series of failures will be avoided.
