Chapter 749

Wired broadband?

In addition to transmitting TV signals, it can also transmit network data?

"Yes, cable loan!" Qin Feng nodded, "cable TV signal line is a cable, which can transmit signals!"

"Did you develop this technology successfully?" Asked the director of the TV station.

Lei Jun was about to speak, but Qin Feng stopped him.

"The technology has been successfully developed. At present, we are at the international leading level. Better than our technology, only the United States! Other countries do not have such expertise! If we use wired broadband Internet access, our network speed will reach the international leading level! " Qin Feng said confidently.

Lei Jun on one side was almost thundered. At present, this technology only stays in the mouth of Qin Feng. Jiang Yong's research and development of this technology is still in a state of ignorance.

Although it is true that wired broadband can be used as network data transmission, there are technical barriers in this regard. This also requires R & D and the manufacturing and production of relevant equipment. Especially in the technical agreement, this needs a breakthrough.

Now there is nothing. Qin Feng patted his chest boldly to ensure that what if he couldn't do it?

"Is it expensive?" Asked the director.

"In terms of technology, our company can provide it free of charge. As for Internet access equipment, Internet users buy it, which has nothing to do with TV stations. What TV stations need to charge is the relevant network service fee for Internet access! " Qin Feng said, "moreover, this is not only for colleges and universities, but also for the whole city. Anyone who has installed cable TV can surf the Internet!"

Qin Feng's eyes suddenly brightened. If you get this wired broadband on your own side, you may be able to greatly improve the domestic Internet access process.

After all, nowadays, Internet access is still limited by telephone lines, which is not only expensive, but also slow. But wired broadband is high-speed.

At present, the fastest telephone line on the market is 64K, which is very few. Most are not so fast.

28K and 56K are in the majority.

However, for wired broadband technology, a 6mhz channel is separated from the TV channel between 42mhz and 750MHz for downlink data transmission. Generally, 64QAM (quadrature amplitude modulation) modulation mode is adopted for downlink data, and the maximum rate can reach 27mbps. If 256qam is adopted, the maximum rate can reach 36mbps. Uplink data is generally transmitted through a section of spectrum between 5 ~ 42mhz. In order to effectively suppress uplink noise accumulation, QPSK modulation is generally selected. QPSK is more suitable for noise environment than 64QAM, but the rate is low. The uplink rate can be up to 10Mbps.

This speed is faster than later generations, certainly not as fast. After all, later generations, wired broadband Internet access was later abandoned. Because the speed is too slow.

Later generations, there are 100m optical fibers, even 200m. That speed, just.

But now, at least in the next decade, the speed of cable TV Internet access is enough to meet most needs.

If the whole country uses wired internet access, the network development will usher in a golden age. China's network environment will usher in its heyday ahead of time.

And I will promote the development of China's network.

If so, then... Qin Feng thinks he will make incredible wealth.

Although smart phones have not been popularized, this is difficult to overcome in the short term. But you can get all kinds of things on the Internet.

For example, chat tools, video tools, download tools and so on, as well as online shopping, online services and so on. These can be worked out.

In this regard, we can completely unify ourselves. Get it out. At that time, once the smartphone explodes, its own company will rule the whole China and even the world.

On this thought, Qin Feng is a soul stirring.

"How much do you think is appropriate?" Asked the director.

"Well, I think the initial stage is to seize the market. It can be cheaper. After all, these equipment are all one-time investment, and only proper maintenance is required in the follow-up. Usually it's mainly electricity consumption. " Qin Feng said.

Subsequently, the director asked some detailed questions. Of course, these details are purely technical and completely irrelevant.

After all, the director doesn't understand. I can only ask questions like balance of payments.

"OK, if the technology is feasible, we can cooperate with you!!!" The director nodded in agreement.

After all, with the mayor and the presidents of Tsinghua University, Peking University and Conservatory of music, he would naturally agree.

In particular, it sounds good. Then there's no problem.

In this case, he will naturally agree.

"Thank you, director! This cooperation, I believe you will feel lucky in the future. This is one of the most correct cooperation! " Qin Feng smiles.

"You are confident, boy. Then we'll wait and see! " The mayor laughed.

Later, Qin Feng and Lei Jun bid farewell to the crowd and returned to the company.

"Qin Feng, we haven't skimmed the eight characters yet. Where did you get it?" Lei Jun asked anxiously.

"Yes, we have been thinking about this technology for a long time and have no clue at all! I don't know where to get it! " Jiang Yong also looked distressed.

There are some things you can't think of. After all, this is something from nothing. What do you do?

"I know, but the United States has developed it!" Qin Feng said with a smile, "Time Warner has developed this technology. They used a hardware device called CABLEMODEM to transmit data. "

Cable modem, that is, cable modem. Different from the traditional model, this cable modem integrates the functions of modem, tuner, encryption and decryption equipment, bridge, network interface card, virtual VLAN agent and Ethernet hub. It does not need dial-up Internet access, does not occupy the telephone line, and can provide a permanent connection online at any time. A VPN (virtual private network) connection is established between the service provider's equipment and the user's modem, and a standard 10baset Ethernet interface is provided to connect with the user's PC equipment or LAN hub.

"How do you know so well?" People smacked their tongues.

"Have you forgotten that I am also a college student in Tsinghua IT department?" Qin Feng stared, "besides, I've been to the United States several times."

Everyone suddenly.

"But even if we know, we don't understand! And if we buy this equipment, we may not be able to copy it! " Asked Jiang Yong.

"Don't worry. No, it's may day soon. I'm going to fly to the United States to visit Time Warner and see if I can introduce this technology! " Qin Feng said, "if you can, it will be simple."

"Will they sell?" Lei Jun frowned.

"Don't worry, as long as you make money, there's nothing you can't buy! Besides, I won't go there as I am! " Qin Feng smiled faintly.