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The armoured components of optical cables are all metal conductors. If the power lines are short-circuited or lightning strikes the metal parts, strong current will be generated to destroy the optical cable line equipment, and even casualties will occur in serious cases.

1. Shock of Lightning

The armoured components of optical cables are all metal conductors. If the power lines are short-circuited or lightning strikes the metal parts, strong current will be generated to destroy the optical cable line equipment, and even casualties will occur in serious cases.

2. Insulation of optical cable lines is poor

If the insulation of communication optical cable line is not done well, the operation strength of optical cable will be greatly reduced due to stress corrosion and static fatigue after the joint box is inundated or in the case of dampness, and cable breakage will occur in serious cases.

3. The influence of external forces

Line faults are often caused by external forces. Because many communication optical cable lines are laid in the field, the general burial standard is deep below the ground, so it can not effectively avoid the damage of many external factors to the optical cable lines.

4. Faults at line joints

Faults are most likely to occur at the junction of the line, because the optical fibers at the junction have no protection to the original cable structure or the protection has been significantly weakened, so the routine operation and protection work can only rely on the junction box, which leads to a great increase in the probability of faults.

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