Talking about the photos of Si Nuo Telecom's maintenance of optical cables

In recent years, optical fiber has become the mainstream access medium for home broadband. Compared with network cable and telephone line, ordinary consumers don't know much about some characteristics of optical fiber. Back to the topic, broadband maintenance personnel tied a knot to the optical fiber, will it affect it?

The answer doesn't matter.

Compared with the network cable and telephone line, the rubber cable for home broadband access is still very solid. In general, as long as the cable is not bent to death, it will not affect broadband transmission.

As can be seen from the above figure, the optical fiber is stored in this way before being installed in the user's body, usually in a circle. Such a ring will neither harm the optical fiber nor affect the normal transmission.

I believe many people often see coiled optical fibers on some rural telephone poles. This is a standard wiring specification, so don't worry at all.

Even if it is bent like this, it will not affect the data transmission performance of the optical fiber. Broadband is installed at home, and sometimes the leather line is too long. It is also common sense that maintenance personnel usually coil the remaining optical fibers into a circle and then tie them with wires.

Of course, in some rural areas, because it is very difficult to fix the optical fiber, some maintenance personnel will tie a knot and fix it in one place. In fact, although this method is not very beautiful and does not conform to the wiring specification, it will not affect the transmission performance of optical fiber, so you can use it with confidence.

If the user is not at ease, he can enter the light cat to check the light attenuation value. The optical attenuation value satisfying the normal operation of broadband is between 16-28. It should be noted that the critical values of 16 and 28 are not suitable. As long as it is between these two values, you can use it with confidence.

Optical fiber is generally not suitable for knotting and folding, which is to ensure normal optical attenuation, and it is generally best between 16-28. If the light attenuation is too high and greater than 28, it is easy to cause network instability, usually the optical fiber is folded, or the hot melt interface is in poor contact. As for the master tying a knot on the optical fiber in order to reduce the optical attenuation, when the optical attenuation of the user is too low, it is not a good thing to be lower than 10, and it is easy to cause network instability. If the problem lies in the primary and secondary optical resources, an attenuator can be used to improve the optical attenuation, but actually it is not necessary to go to the user's home, so the master ties a knot on the optical fiber to obtain a normal range value and achieve a stable effect. In fact, this practice is not desirable. Most problems in users' homes are caused by the direct connection of obd main optical fiber from the optical junction box to users' homes. The normal practice is to add a splitter to the optical junction box in the corridor, so that the optical fiber does not need to be discounted.

Whether broadband maintenance personnel tie optical fiber to reduce optical attenuation is not recommended.

The normal optical fiber is the domestic broadband pigtail, and a part of it is usually reserved.

How to deal with the problem of too strong optical attenuation is that the base station is close, the transmission route is short, the optical signal is strong, and the network cannot be opened.

The consequence of the problem and the fundamental reason that affects this problem are to save trouble and reduce the light decay by soil method.

How to treat this irresponsible behavior of broadband maintenance personnel?

Welcome to leave a message to discuss, like a little attention.

Optical fiber is generally not suitable for knotting and folding, which is to ensure normal optical attenuation, and it is generally best between 16-28. If the light attenuation is too high and greater than 28, it is easy to cause network instability, usually the optical fiber is folded, or the hot melt interface is in poor contact. As for the master tying a knot on the optical fiber in order to reduce the optical attenuation, when the optical attenuation of the user is too low, it is not a good thing to be lower than 10, and it is easy to cause network instability. If the problem lies in the primary and secondary optical resources, an attenuator can be used to improve the optical attenuation, but actually it is not necessary to go to the user's home, so the master ties a knot on the optical fiber to obtain a normal range value and achieve a stable effect. In fact, this practice is not desirable. Most problems in users' homes are caused by the direct connection of obd main optical fiber from the optical junction box to users' homes. The normal practice is to add a splitter to the optical junction box in the corridor, so that the optical fiber does not need to be discounted.

This is because the optical signal is too strong during installation, because there is no attenuator in the middle, that is, optical splitter. The installer knows that too strong a light signal will burn the cat, so he will tie a knot for you to reduce the light signal. I know that. Just don't touch it.

Broadband maintenance personnel tied a knot to the optical fiber, will it affect it?

Generally, it will not affect the normal use, and it will cause serious consequences under special circumstances.

As we all know, optical fiber is usually called glass fiber, and its main component is silicon dioxide. Using the principle of total reflection of light, large-capacity and long-distance transmission of optical signals in optical fiber can be realized.

Compared with wireless communication and traditional wired communication, optical fiber communication has the characteristics of strong anti-interference ability and is generally not easily affected by external factors. However, excessive bending of optical fiber will greatly reduce its transmission performance and even directly lead to communication interruption.

What's the matter with the optical cable "gone"? In daily life, people often see a large roll of optical cable being reserved in a telephone pole or corner, which is actually a roll of optical cable. In the process of laying communication optical cable, there are clear specifications and requirements for the tray of optical cable. The main reason of tray is to facilitate temporary change of optical cable routing and maintenance and emergency repair of optical cable faults.

Generally speaking, normal optical cable lines need to reserve about 20 meters every 0.5KM, but in the case of special terrain, fault-prone points and cross-business, it depends on the specific situation.

Therefore, in the process of home broadband installation and debugging, technicians will leave some optical cable reels for maintenance needs, which will generally not affect the normal use of services.

Will the knotting of optical fiber affect the use of broadband? Generally speaking, in order to ensure the signal transmission effect of optical cable, the curvature radius index of optical cable (optical fiber) with different wire diameters and different models has clear requirements.

Home broadband access, as long as the bending radius of optical fiber is greater than 40mm, generally there will be no negative problems.

What are the correct understandings about the use of optical fiber? To sum up, the knotting of optical fiber (optical cable) will generally not affect the normal use of broadband services, but violent knotting caused by irregular installation will cause poor network experience and network interruption.

Generally, the light is too strong, so make a button to reduce the light.

If it is for the sake of beauty and order, it is generally no problem to tie the excess optical fiber with a rope;

If an optical fiber is bent to death, it will definitely affect the communication quality.

The principle of optical fiber communication We can see that ordinary optical fiber is composed of two wires and is not easy to bend. The reason is that there is a metal wire and a "glass fiber" in it. The metal wire plays a protective role and protects the fragile "glass fiber" from being damaged and broken. It is this kind of "glass fiber" that plays the role of communication.

In communication, the transmitting end first converts the transmitted information into an electrical signal, then modulates it on the laser beam emitted by the laser, and then sends it out through the optical fiber; At the receiving end, the detector converts the optical signal into an electrical signal after receiving it, and recovers the original information after demodulation. At this time, a communication is completed, and the process of optical signal transmission in optical fiber is to use the reflection principle of optical fiber, so a broken optical fiber will affect communication.

Bundling optical fibers will basically not affect the communication quality of optical fibers. Sometimes broadband is installed, and there are a lot of fiber glue lines left. The installer will wind the optical fiber into a circle along the force of the metal wire, and then gently tie it with a rope, which is beautiful and clean. This method will basically not affect the communication quality of optical fiber, because the "glass fiber" inside will not be broken.

If the optical fiber is broken, it will definitely be interrupted. We know that the characteristics of glass are very fragile. If the optical fiber is directly broken at 90 degrees, the "glass fiber" inside will be broken. In this way, the communication quality can not be guaranteed, and it is basically broken. At this time, it is necessary to subtract the broken optical fiber, and then fuse the two ends of the optical fiber with the optical fiber fusion machine to restore normal communication.

I've done all of them and tied knots, but they were all tied in the fiber sorting box! Because it is a newly added Pon port, there is only one first-class 1:8 optical splitter. At that time, there was no optical splitter, and the first-class light was sent directly to the user's home, and the light attenuation was -7.5, which led to the frequent disconnection of the optical cat. No choice but to tie a knot to improve the light attenuation. When we got optical splitter, we gave him a second-class light, just tied a knot in the fiber distribution box, and didn't have to go to the user's home!

There is no doubt that fiber bending will cause loss, not to mention knotting on the fiber. The knotted optical fiber is basically scrapped, and broadband maintenance personnel will not make such low-level mistakes.

No optical fiber builder will foolishly calculate the optical fiber just right. What if it's not enough? What should I do if there are problems in the later stage that need maintenance? So we can see that wherever there are optical fiber connectors, a long section of optical fiber will be reserved. In the case that the optical fiber cannot be bent, the optical fiber has to be wound in a circle to reduce the pool area. Optical fibers are usually tied with ribbons or other articles, which will not bend and knot the optical fibers themselves.

The main reason of optical fiber loss is that the intensity of light will gradually weaken after the optical signal is transmitted through optical fiber. The loss of optical signal is the loss of optical fiber, which can also be called optical attenuation, which is what we often say. Optical attenuation refers to the attenuation per unit length of optical fiber (dB/km).

On the one hand, optical fiber loss is caused by the inherent characteristics of optical fiber materials, and the technical term is called optical fiber inherent loss. For example, molecular vibration and uneven doping of wavelength cause optical signals to be consumed in optical fibers in the form of heat energy during propagation. Absolute idealized optical fiber materials cannot be produced, and the performance of optical fiber can only be improved by doping.

In addition, the irregular molecular structure of optical fiber can also cause light scattering. When scattering occurs, the energy of the optical signal will be scattered in all directions, leaving only a part to continue to propagate along the line. Similarly, there is no way to completely eliminate this phenomenon, which can only be reduced by strictly controlling fiber coating and extrusion.

In addition to the loss caused by the optical fiber itself, there are also bending loss and docking loss, which are human factors. When the bending degree of the optical fiber exceeds the radius of curvature of 2mm, it will cause great loss, so special attention should be paid not to seriously bend the optical fiber during the optical fiber laying process.

Usually, when broadband experts see that the optical attenuation is very serious, they can basically solve it by remelting the optical fiber. It can be seen that optical fiber fusion has a great influence on optical fiber loss, and a master with good technology can minimize the extrinsic optical fiber loss of optical fiber.

Key points of daily management of optical fiber Now almost every household has optical fiber broadband to transmit signals through optical fiber. Although the master of broadband installation will properly handle the optical fiber during installation to ensure the transmission of optical signals, sometimes when we want to move the optical cat or optical fiber, we will regard the optical fiber as a cable and finally find that we can't get online.

First of all, we should know that there is no copper in the optical fiber, it is just a kind of optical fiber made of glass or plastic, which uses the principle of total reflection of light to transmit optical signals inside the optical fiber. That is, when light enters the optical hydrophobic medium from the optical dense medium, the refracted light with a refraction angle greater than the incident angle will completely disappear, leaving only the reflected light.

I am very afraid of pulling or bending fibers the thickness of my hair. Knotting is a fatal dose to optical fiber, and micro-cracks in optical fiber will cause permanent damage. The optical fiber can be moderately bent, and the bending radius that the optical fibers with diameters of 1.6mm and 3.0mm can bear is not less than 3.5cm, and the winding of the optical fiber should not be tied too tightly.

The conclusion is that optical fiber does not contain copper and has no characteristics of other metals. It has the characteristics of fiberglass, so it can't be pulled, bent or knotted.