Experienced fiber networking problems, please

Since it is a LAN composed of two LANs, it is recommended to use two schemes:

First: economical and practical, with a fiber optic transceiver, 1000m fiber connection, that is, with a pair of 1000m fiber optic transceivers, the cost is indeed about 1500. A 100m fiber connection, that is, a pair of 100m fiber optic transceivers, does cost about 600; Put one at a time.

Second: safe and reliable, with a photoelectric switch, 1000m optical fiber connection, that is, with 2 optoelectronic switches with an optical port of 1000m and a 100m electrical port with a downward connection, the cost is indeed about 7000. 100m optical fiber connection, that is, using two optoelectronic switches with an optical port of 100m and a 100m electrical port with an uplink optical port and a 100m electrical port, the cost is also about 5000.

Just put one at the end.

And the optical fiber connection can be multi-mode four-core optical fiber.

Gigabit optical fiber, photoelectric conversion buy medium, 800 pieces each, multimode fiber per meter yuan.

The main switch of each building connects the Ethernet cable, converts it into optical fiber through photoelectricity, pulls it to another building, and then connects to the opposite side through photoelectric conversion to Ethernet.

The technical problems are easy to solve, and the wiring design still needs to be specially asked to be done by the company.

If it exceeds 100m, it is connected with a fiber optic cable. The next terminal at both ends, just get two switches.

Two points and one line. The indoor wiring of the two buildings is routed in the center position. It would be better to have a diagram.

The so-called megabyte size of the fiber is determined according to the data under the service provider.

From the computer room to a building, the main cable, the lower terminal, the optical modem, and the switch. The switch then goes to the modem, the optical cable, to another building (modem, switch) and the switch to the microcomputer.

It is recommended that you install the switch at the center point, the shorter the twisted pair, the smaller the loss.

1. All of them are three problems, but they cover three aspects: process, testing and production, and together they are a very comprehensive production process!! If you are afraid that it is difficult to explain in detail, please answer your question briefly! 1. Due to the difference in structure, the main difference between these two kinds of optical cables in production lies in the process and equipment, such as the outdoor optical cable adopts the loose sleeve layer twisted paste filling structure, and the indoor cable pair adopts the tight sleeve structure, even the ordinary single core and product optical fiber also need to be tightly sleeved and protected (the outer direct sheath of the leather wire optical fiber actually belongs to the category of tight sleeve), and the outdoor optical cable is basically covered with optical fiber secondary in consideration of the tensile performance (loose tube, the optical fiber can slide relatively in the sleeve, and is filled with fiber paste to protect the optical fiber), In addition, the mechanical properties of indoor optical cables are lower than those of outdoor optical cables, in terms of reinforcements, indoor optical cables are mostly made of aramid, FRP and other non-metallic materials, and outdoor optical cables are mostly treated with metal steel wires such as phosphating technology. The number of equipment is less demanding, and due to the small structure of indoor optical cable, the extruder is generally 45, while the outdoor optical cable usually needs more than 80 extruder.

2. The principle of optical fiber testing can be understood in general as the loss detection of optical energy in the transmission process of optical cable, and the optical cable may be subjected to external force after processing due to the unstable structure in the processing process, which may lead to the overall or partial force or damage of the optical fiber, resulting in the decline of the attenuation of the optical fiber, just like the water pipe may affect the flow of water after being injured and deformed, and the detection method is necessary, that is, to prevent the hidden danger products from flowing into the production or factory, and affecting the transmission of the optical cable link in the process of use (the answer may be a little simple). 3. Outdoor in the production process of optical cable, the optical fiber should consider the qualification of attenuation in the whole processing process, and there are many reasons for it, so different processes in the production process of optical cable should consider different process control points, coloring pay attention to the curing degree of ink on the optical fiber, the cleanliness of the workshop, the control of the remaining length of the optical fiber in the tube, the control of the stranding pitch and the secondary residual length of the cable, and the integrity of the sheath layer should be paid attention to the paste filling, steel and aluminum strip longitudinal wrapping, and the integrity of the sheath layer. The main concern for indoor fiber optic cable is the use of materials, which directly affects the performance of optical fibers, including the accuracy of equipment temperature control, material performance indicators, water temperature control, etc.! Due to the time constraints, the above answers are somewhat general, and I hope they help.

If the cell is connected to optical fiber, if I want to enjoy optical fiber Internet access, do I need to replace the original modem of my home with optical modem?

If it is fiber-to-the-cell (FTTB), it means that the community uniformly sets up optical fiber equipment and then uses a network cable to enter the home, which can be directly connected to the router;

If it is fiber direct to the home (FTTH, which is currently the mode in most areas), it will send you an optical modem. Many optical modems have routing or even wireless routing functions, but they are usually shielded.

Can I use a normal router to connect to fiber optic Internet?

Optical fibers are special interfaces and cannot be routed directly.

If I want to replace the optical modem, can the optical modem be connected to the original router?

OK. Is the network cable interface the same?

Networking cables are the same all over the world, and of course they are the same.

What is the speed of fiber optic Internet access?

Depends on how much the carrier gives you. Theoretically, the maximum can be more than 1000Mbps. At present, the domestic optical fiber to the home is generally 2m-20m

What are the speed limitations?

The operator gives you as much as you want. In addition, it is slightly affected by router performance.

I'm fiber-to-the-home, so I want the optical modem, the optical modem comes out of the standard port, you can connect to the original router, the cell access you said may have equipment in front, so it's directly WLAN, it's an ordinary network cable to the home, depending on the situation.

Cell access fiber, which one are you? Generally speaking, there are two types of cell access fiber: fiber-to-the-building and fiber-to-the-home.

If it is fiber-to-the-building, then the fiber is connected to the switch after reaching your building, and then it is generally connected to the home through the network cable; There is also fiber optics directly to the home. If it is a network cable to the home, then use an ordinary router. If it's fiber-to-the-home, then you need a special router with a fiber interface or a fiber optic transceiver, and then connect to an ordinary cat.

Generally, home fiber optic Internet access will be about 100m, as far as fiber optics are concerned, there is no problem to reach gigabit, but home user operators will not give you such a large network speed, and we can't afford to pay the cost. Generally in the twenty or thirty trillion. Hope it helps.

Fiber modem comes with its own routing function, and it is sent by telecommunications.

1. The more optical fiber cores, the more services can be carried on the same optical cable.

2. Aside from other equipment, just look at optical fiber and optical fiber transceiver, and its rate is only determined by the transceiver; Packet loss and rate reduction can only occur if the optical attenuation is too large due to poor fiber quality or poor deployment and splicing.

3. The maximum transmission rate of the general transceiver is 100m, and the transceiver is divided into two types: single core and double core, the single core transceiver will use one core in the optical cable, and the double core transceiver will use two cores; If the rate of 100m is not enough, you can consider using multi-pair transceivers and using port aggregation to increase bandwidth, but the core usage of the fiber cable will increase.

4. The optical cable is only the medium for transmitting signals, and the signal propagated in the fiber core is determined by the equipment at both ends; The cores in the same fiber optic cable are independent of each other and do not affect each other.

There are more fiber cores, which can be divided into multiple channels and redundant.

Optical fiber and optical fiber transceiver, first of all, the outgoing distance, generally speaking, the light is transmitted in the middle of the optical fiber, which is caused by the loss, this loss is called optical attenuation (optical attenuation is calculated by the quality of the fiber core of the fiber itself, the quality of the fusion splicing point, the coupling point, the insertion loss, etc.). Generally speaking, the optical attenuation caused by the fusion point is relatively small, and the attenuation caused by the coupling point is very large, and if the joint is not done well or the quality is not good when the end is formed, coupled with the problem of the coupler itself, the insertion loss of the coupling point will be very serious). The attenuation size is expressed in db.

Generally speaking, today's fiber optic transceivers are generally 20km. Of course, there are also those that support larger kilometers. As long as the attenuation of the fiber is within the allowable range, then it is necessary to consider what kind of fiber transceiver to add according to the required transmission distance.

I once made a 37 km dedicated fiber optic cable connection, and added 60 km of optical transceiver at both ends. This has nothing to do with the number of fiber cores, because normal optical networking, two cores are enough, and then in order to ensure safety, two cores are generally added for redundancy (regardless of the intermediate core). Of course, if it is a very long long-distance transmission, it is more secure to add a relay station in the middle if there are conditions.

There is no special companion setup for fiber optics. Simple optical fiber transmission data, there are photoelectric transceivers, optical cables are fine. Whether it is a TV signal, a network signal or a ** signal, it is now a digital signal.

The photoelectric transceiver converts digital signals into optical signals for transmission in optical cables. Of course, then you may need amplifiers (TV signals), switches (networks), program-controlled switches or multi-channel switches (signals), etc. There are many levels involved, and it is recommended that you look for professional information to take a look at this point.

In one optical fiber, multiple signals can be taken. Because the bandwidth of the fiber itself is very large, one fiber is enough to do it. In fact, the key to transmission in optical fiber is to look at the equipment of the uplink and downlink of the photoelectric transceiver.

Therefore, as you said, the transmission between the two factories, in fact, after the optical cable is laid and the photoelectric transceiver is added, the rest is to see what equipment is used.

The optical fiber is a semi-finished product, and the optical cable has 2 576 cores.

It is the fiber optic transceiver that determines the transmission distance.

Optical fiber can transmit TV signals, network signals, ** signals. What kind of equipment is needed for this? What is the name of the device? You check "Guangzhou Lejin" has an explanation.

One fiber can travel multiple signals.

Optical fiber is a transmission medium, and it is not bad like a network cable.

The number of cores is more than one link.

Transceivers are available in single-core and dual-core.

Fiber optic using transceivers, fiber routers, and fiber optic switches can all be connected to the optical modem and can ** network go together.

1.To correct a point, it is multimode and not bimode.

In multimode fibers, optical signals propagate through multiple pathways; It is generally recommended to apply when the distance is less than a mile.

The effective distance of multimode fiber from transmitter to receiver is about 5 miles. The usable tracking is also affected by the type and quality of the transmitting and receiving device; The stronger the light source, the more sensitive the receiver and the farther the distance. Studies have shown that the bandwidth of multimode fiber is about 4000MB s.

Single-mode fibers are manufactured to eliminate pulse broadening. Due to the small core size (7-9 microns), light jumps are eliminated. Focused laser sources are used at 1310 and 1550 nm wavelengths.

These lasers are directed into the tiny core and propagated to the receiver without significant jumps. If multimode can be compared to hunting, which can load many projectiles into a human barrel at the same time, then a single mode is a rifle, and a single ray is like a bullet.

Single-mode fiber. Single-mode fibers have a thinner core, allowing light to be emitted directly to the center. It is recommended for long distances.

In addition, the distance loss of a single-mode signal is smaller than that of a multi-mode signal. At the first 3,000 feet, a multimode fiber can lose up to 50% of its LED signal intensity, while a single-mode fiber can only lose its laser signal at the same distance.

The bandwidth potential of single-mode makes it the only option for high-speed and long-distance data transmission. Recent tests have shown that 40G Ethernet 64 channels can be transmitted over a distance of up to 2,840 miles on a single single-mode optical cable.

2.The most common determinant of choosing between multimode and singlemode is distance. If you only have a mile, multimode is preferred, because LED transmitters and receivers are much cheaper than the lasers required for singlemode.

If the distance is greater than 5 miles, single-mode fiber is optimal. Another issue to consider is bandwidth; If future applications may include the transmission of high-bandwidth data signals, then singlemode will be the best choice.

3.You can now use a switch that supports multimode modules.

4.Because I'm not from Lanzhou, this is not very clear!

Therefore, its inter-mode dispersion is very small, which is suitable for long-distance communication, but its chromatic dispersion plays a major role, so that the single-mode fiber has higher requirements for the spectral width and stability of the light source, that is, the spectral width should be narrow and the stability should be good. Multimode fiber: the center glass core is thicker (50 or, can transmit multiple modes of light.

However, the intermodal dispersion is large, which limits the frequency at which the digital signal can be transmitted, and it becomes more severe with distance. For example, a 600 km fiber will only have 300 MB of bandwidth at 2 km.

Therefore, the distance of multimode fiber transmission is relatively close, generally only a few kilometers.

A3: Optical fiber transmission can use a special optical fiber switch, or you can use a media converter to interchange with twisted pairs. If you need to connect the optical fiber to the computer, you can use the network card of the optical fiber interface.

Question 4: I don't know...