Optical Fiber Cable Line Fault Judgment

The main characteristics of optical cables are small size, good corrosion resistance, long transmission distance, small line loss, strong anti-electromagnetic wave ability, etc. Using optical cable lines for communication has become the main communication method. There are many factors that lead to the failure of communication fiber optic cable lines. Reasons for fiber optic line failure:

1. Internal factors.

If the insulation performance of the optical cable line is not good, the joint box will be affected by moisture or water, and the operating strength of the optical cable will be greatly reduced due to reasons such as stress corrosion and static fatigue. In severe cases, the optical cable may break. situation, a failure occurs.

2. The line connector is faulty.

This is also the most prone to problems, because the original cable structure is not protected or weakened. If you want to work normally, you must rely on the splice box, thereby reducing the number of splice failures and better protection. Fiber optic lines run smoothly.

3. External factors.

The first is the impact of Thunder. All network cables used in cabling systems have metallic conductors. When they are struck by lightning, a strong current will be generated, causing damage to the optical cable equipment, and even causing casualties in severe cases.

4. External influences.

This is caused by its wiring environment. The laying of optical cables is generally in the field, and the standard for burying is to bury them deeply below the underground layer, so it is difficult to avoid damage to the optical cables in this respect.

How to accurately determine the location of obstacles?

Regardless of the connection method used during construction, the cladding layer of the optical fiber connector has been removed. Although the protection has been enhanced, the strength and flexibility of the optical fiber at the joint is not as good as before. In addition, during seasonal construction, large temperature difference or fiber coiling process, excessive force and improper position will squeeze the bare fiber inside and form air bubbles inside. When hot-melting, dust and fine sand enter the hot-melting pipe, and are affected by sun, rain, wind and vibration, vibration, etc. during the repair process, and obstacles may appear at the joint of the overhead optical cable.

The obstacles in the middle of the optical cable are mostly caused by factors such as man-made external forces and natural disasters. During testing, it may be found that one or more channels of optical fibers at the same location are blocked, or several optical fibers in a bundle of tubes have high loss. At this time, the approximate location of the fault can be judged according to the detected distance and maintenance drawings. If there is no total resistance due to knife cutting, rat damage, etc., and the obstacle point is hidden, you can open the fusion splice box that is closest to the obstacle point, disconnect the fiber problem, and test both sides.

Termination failure refers to the failure of the pigtail terminal box and the incoming fiber optic cable. During the test, it was found that there was no emission signal or the starting position was too low. It is necessary to reduce the measurement range, change the pulse width and re-test to determine the specific position of the obstacle.