There are several mega meters of telecom optical fibers

The "telecom optical fiber" you mentioned does not refer to the optical fiber medium in a broad sense (as explained on the second floor, the bandwidth depends on the optical transmitter and receiver - that is, the optical module on the device), but the telecommunications user-oriented "optical fiber broadband access" service. It has been commercialized on a large scale, and the mainstream ones are FTTB fiber-to-the-building and FTTH to the home. In terms of bandwidth, the FTTB service model is gigabit to the building, 100 megabit to the floor, and 10 megabit to the home (dense cell). There are also 100 trillion direct to the door; FTTH is clearly gigabit to the home; The above refers to the physical bandwidth.

The user can actually feel that the bandwidth used is the bandwidth that the telecom opens to your account according to the money you pay. In other words, even if you have 1000M FTTH, you may only have 2M, 4M, or 8M access to the Internet, while others, such as IPTV services, use the remaining bandwidth.

The bottom is 10 trillion, the highest is 100 trillion, that is, there are 10 trillion, 20 trillion, 30 trillion, all the way to 100 trillion, but 100 trillion is the ideal number, generally to 95 trillion.

Hello, first of all, thank you for your support to China Telecom. At present, Anhui Telecom has launched 4m, 8m, 20m fiber broadband, there are other different types in various regions, generally there are these types of broadband, you can log in to your local telecom business hall for details.

There is no mega(m)" number of optical fibers, depending on the switching equipment.

Optical fiber cannot be described as "mega", optical fiber broadband is to convert the data to be transmitted from electrical signals to optical signals for communication. At both ends of the optical fiber, there are "optical modems" for signal conversion.

Optical access networks use optical fiber as the primary transmission** to replace traditional twisted pair cables. Since optical signals are transmitted on the optical fiber, it is necessary to convert the electrical signal into an optical signal at the exchange office and then transmit it on the optical fiber. At the user side, the optical network unit (ONU) is used to convert photoelectric signals and send them to the user equipment.

This depends on how much the operator gives, whether it is 0 at least, and it should reach 100T at most Why is fiber fast --- theoretical explanation Fiber optic communication services such as FTTH (Fiber to the Home) are becoming more and more popular. When people think of "optical fiber", the first thing that comes to mind is that it transmits faster data than copper wires that conduct electrical signals. Why is that?

Let's take a look at this aspect. Light has a velocity that can circle the Earth seven and a half times per second. Some people may think that this is the reason why optical communication is faster than electrical communication using copper wires, but it is completely wrong.

Because the speed mentioned in communication is not the speed of signal transmission, but the ability to transmit data. Judging from the speed of signal transmission alone, there is not much difference between the electrical signal conducted in the copper wire and the optical signal conducted in the optical fiber. However, in the same amount of time, the amount of data transmitted by the line using fiber optic communication is much larger than that of the copper wire, so the speed is faster.

In fiber optic communication, the sender converts the electrical signal into the scintillation of a laser (i.e., the laser signal). In order to transmit a large amount of information in a short period of time, it is necessary to increase the number of flashes. In other words, the extent to which the laser can be flashed in a short period of time will determine the speed of data transmission.

The same principle applies to the use of copper wires to conduct electrical signals. Data is transmitted by turning electrical signals on and off, or by reversing positive and negative polarity. The speed of data transmission will be determined by how quickly the electrical signal can be turned on and off, and the polarity of the electrodes reversed.

The difference between the two is that the speed (i.e., frequency) limit of the fiber to turn on and off the signal is much higher than that of the copper wire. This is the main reason why high-speed communication is possible using optical fibers. Communication using copper wires is not only the opening and closing of electrical signals, but also the increase in transmission speed through various methods.

Gigabit Ethernet, which uses twisted pair cables, can transmit 5 bits of information at a time instead of 2 bits of information that is turned on and off by changing the voltage value in detail, and a transmission speed of 1 gbit-second is achieved by combining four pairs of twisted pair cables into a bundle. Gigabit Ethernet transmission is now approaching its limit as an electrical signal communication technology. Optical fiber communication, using a single optical fiber, has achieved 1,000 times the number of gigabit tbits, and second-level communication.

Moreover, fiber optic communication speeds are currently far from being at their limit. According to the estimates released by Bell Labs in June 2001, it is theoretically enough to achieve a transmission speed of 100 tbit-seconds in optical fiber communication. Existing technologies do not realize the full potential of fiber optics in any way.

Compared with the electrical signal communication technology, which is close to the limit, there is still a huge room for development of optical fiber communication technology. From the perspective of the development process of electrical signal communication technology, the development stage of optical fiber communication technology, the current optical communication technology can be said to be only equivalent to the 1200-bit second modem more than ten years ago.

This statement is unscientific. The optical fiber is only used as a carrier to transmit data, and the transmission of multiple large data streams on the optical fiber is related to the equipment at both ends of the optical fiber.

At present, hundreds of megabytes, gigabytes, and even terabytes of data streams can be transmitted over optical fibers.

There are not many megabytes of optical fiber, and this is the same as ordinary broadband. If you want to open 1M bandwidth, that is 1M, open 100M bandwidth, that is, 100M, in a specific environment, there is no problem for optical brazing to reach 10G bandwidth In addition, because the transmission loss of optical brazing is small, so in the case of the same bandwidth, it is generally much faster than ordinary ADSL.

The rate is determined based on the device used.

Optical fiber is a kind of cable that transmits optical signals, at the transmitting end, the equipment converts the electrical signal into an optical signal and transmits it to the optical fiber, the optical fiber is transmitted to the receiving end, and the receiving device converts the optical signal into an electrical signal.

The physical bandwidth of optical fiber can reach a rate in g, such as 10G, etc. Household fiber 100m support (Internet cafes are basically 10m fiber optic links) (The fiber rate is related to the interface electrical characteristics of the equipment) If you use it, the bandwidth of 2-4m can be used is not very good.

Well, a few megabytes of fiber is a few megabytes. Optical fiber is only a device for accessing broadband, and the usual network cable is a concept, but the optical fiber transmission effect is a little better.