1. The impact of lightning
The armor components of the fiber optic cable are all metal conductors. If the power line is short-circuited or the lightning strikes the metal parts, a strong current will be generated to damage the cable line equipment. In serious cases, there may even be casualties.
2. The insulation of the optical cable line is not good.
If the communication optical cable line is not insulated, the operation strength of the optical cable will be greatly reduced due to stress corrosion and static fatigue after the water in the joint box or in the case of moisture, and the cable may be broken in severe cases. .
3. The influence of external forces
Line failures are often caused by external forces. Since many communication optical cable lines are laid in the field, the general embedding standards are deep below the stratum, so it is impossible to effectively avoid the damage of many external factors to the optical cable lines.
4, the fault at the line joint
The fault is most likely to occur in the line joint. This is because the fiber at the joint has no protection to the original cable structure or the protection has been significantly weakened. Therefore, the daily operation protection can only rely on the joint box. The probability of causing a failure is greatly increased.
