The blocking of the optical cable line due to external factors or the optical fiber itself, which affects the communication business, is called the optical cable line fault. The interruption of optical cables does not necessarily lead to service interruption. Those that cause service interruption due to a fault are handled according to the fault repair procedure, and those that do not affect the service are dealt with according to the cutover procedure. So, what are the reasons for the failure of optical cable lines?

First of all, let's understand the classification of optical cable line faults. According to the optical fiber blocking of the faulty optical cable, the fault types can be divided into three types: complete optical cable breakage, partial bundle pipe interruption, and partial optical fiber interruption in single bundle pipe.

1. The optical cable is completely broken. If there are reservations on both sides of the site, take centralized reservation and add a joint to deal with it; if there is a joint near the fault point and there is enough reservation on site, take the method of pulling the reservation and use the original joint to deal with it; there is no near the fault point. It is reserved and has no joints, so it should be solved by means of continuation of cables.

2. Part of the bundle tube in the optical cable is interrupted or part of the optical fiber in the single bundle tube is interrupted. The repair is based on the premise of not affecting other fibers in use. It is recommended to use the skylight connection method to repair the faulty fiber.

So, what is the reason for the complete break of the optical cable, the break of part of the bundle tube, and the break of part of the optical fiber in the single bundle tube?

In fact, the causes of optical cable line failures can be roughly divided into four categories: external factors, natural disasters, defects of the optical cable itself and human factors.

1. Line faults caused by external factors:

(1) Excavation by external force: To deal with the failure of excavator construction, the optical cable of the pipeline is opened to check whether the optical cable is damaged in the manual well, and the two-way test interrupts the optical cable. , you should first conduct a bidirectional test on the optical cable at the fault point to confirm the number of blocked optical cables, and then deal with them in a targeted manner.

(3) Shooting: This type of fault generally does not interrupt all optical fibers, but damages some parts of the optical cable or optical fibers, but it is difficult to find such faults.

2. Line failures caused by natural disasters:

Rat bites and bird pecks, fires, floods, strong winds, ice, lightning strikes, electric shocks

3. Line failure caused by the fiber itself:

(1) Natural fiber breaking: Since the optical fiber is drawn from glass and plastic fibers, it is relatively fragile, and static fatigue will occur with the passage of time, and the optical fiber will gradually age, resulting in natural fiber breaking. Or water enters the splice box, resulting in increased fiber loss or even fiber breakage.

(2) Influence of ambient temperature: If the temperature is too low, the water in the splice box will freeze, and the optical cable sheath will shrink longitudinally, and the pressure will be applied to the optical fiber to produce micro-bending, which will increase the attenuation or interrupt the optical fiber. If the temperature is too high, it is easy to damage the cable sheath and other protective materials and affect the characteristics of the optical fiber.

4. Line faults caused by human factors:

(1) Work failure: human failure caused by technicians in maintenance, installation and other activities. For example, when the optical fiber is spliced, the optical fiber is scratched, and the bending radius of the optical fiber is too small; the running optical cable is cut off by mistake when the optical fiber is cut; the connection is not firm when the optical fiber is spliced, and the reinforcing core is not tightly fixed when the splice box is packaged. Broken fiber.

(2) Stealing: Criminals steal and cut the optical cable, causing the optical cable to be blocked.

(3) Destruction: Deliberate sabotage by man, resulting in the blocking of the optical cable.

These are the main reasons for the failure of optical cable lines. You can take preventive protection according to the actual situation. I hope it can help you. If you have other questions, you can consult online customer service.