Optical cable line failure

What are the faults of optical cable lines

1. The optical cable is completely disconnected

If there are reservations on both sides of the site, take centralized reservations and add a joint to handle them;

If there is a connector near the fault point, and the on-site reservation is sufficient, take the method of pulling the reservation and using the original connector;

There is neither reservation nor joint near the fault point, so it should be solved by connecting cables.

2. Optical cable part

Bundle tube breakage or partial fiber breakage within a single bundle tube

The repair is based on the premise of not affecting other optical fibers in use. It is recommended to use the skylight connection method to repair the faulty optical fiber.

What are the reasons for the optical cable line

The causes of cable line failure can be roughly divided into four categories: external factors, natural disasters, defects in the cable itself, and human factors.

1. Line failure caused by external factors

(1) Excavation by external force: To deal with the construction fault of the excavator, open the optical cable of the pipeline by opening the manhole near the fault point, check whether the optical cable in the manhole is damaged, and test the interrupted optical cable in the second way

(2) Vehicle hang-up: When dealing with vehicle hang-up faults, first conduct a bidirectional test on the optical cables at the fault point to confirm the number of blocked optical cables, and then deal with them uniformly. targeted approach.

(3) Breakdown: This type of fault generally does not interrupt all optical fibers, but damages some optical cables or optical fibers, but this type of fault is difficult to find.

2. Line faults caused by natural disasters

Rat bite, bird peck, fire, flood, strong wind, freezing, lightning strike, electric shock

3. Line failure caused by the fiber itself

(1) Natural fiber breakage: Since the fiber is made of glass fiber and plastic fiber, it is relatively fragile, and static fatigue will occur after a long time, and the fiber will gradually age and cause natural fiber breakage. Or water enters the splice box, causing increased fiber loss or even fiber breakage.

(2) The influence of ambient temperature: If the temperature is too low, the water in the splice box will freeze, the cable sheath will shrink longitudinally, and the pressure on the optical fiber will cause microbending, which will increase the attenuation or interrupt the optical fiber. If the temperature is too high, it will easily damage the protective materials such as the cable sheath and affect the characteristics of the optical fiber.

4. Line failure caused by human factors

Work failure: Human failure caused by technicians in maintenance, installation and other activities. For example, the optical fiber is scratched during splicing, and the bending radius of the optical fiber is too small; the routing optical cable is cut off by mistake when the optical fiber is cut; the connection is not firm during the splicing of the optical fiber, and the reinforcement core is not tightly fixed when the splice box is packaged. Fiber breaks.