Rebirth of the Tech Madman

Look again in 10 minutes. .SUIMENG.lā

...

"Things are concerned about personal interests, and there is no way to choose rude methods." Tang Huan shrugged needlessly. "The scale of Pacific Telecom's analog public telephone network in the western United States is even larger than that of a small country in Western Europe. You can easily give up casually."

Before AT&T was dismantled, it did not rely solely on the monopoly of profiteering corpse-bit vegetarian meals. The telephone network it built across the United States was proud of this super giant, and proved to the federal government that it had a strong interest in the telecommunications industry. The biggest capital where the advantages of monopoly outweigh the disadvantages.

From a famous advertisement at the beginning, we can also see how perfect the quality of the network is: after a mother heard her son's voice on a long-distance call, she almost thought that the other party was by her side, and was moved to tears.

In the process of launching a challenge to AT&T, MCI really couldn’t pick out the opponent’s major faults in terms of service quality. In the end, it could only focus the attack on the expensive communication costs and spoof it. The famous advertisement: When the mother heard her son’s voice, tears were also in her eyes, but it was not out of touch, but worried that AT&T would mail expensive bills the next day.

After AT&T was dismantled, the most valuable asset inherited by the seven "cucurbits" was this network, because the brand and long-distance business were left to the new AT&T.

As the prospects of ISDN are promising, communication companies with complete analog telephone networks like Pacific Telecom are under great pressure. The overall level of communications infrastructure in Europe is not as good as that in the United States. Naturally, there is no need to invest in resources before the distressed. You can rebuild without burden and build a brand new digital network on the rubble of analog networks.

However, Tang Huan knows well. He has a clear roadmap for the development of communication technology. He understands that the traditional analog network does not need to be completely abandoned, and can be transformed and upgraded through DSL technology to provide voice services. The old business model will smoothly transition to a new business model focusing on providing data services, and then continue to make a big profit in the next digital age.

If there was no such support, Tang Huantang's exhaustive purchase of Pacific Bell from AT&T at the time would have been a loss of money.

The principle that DSL technology can provide digital connections through copper wires or local telephone networks lies in the use of additional frequency bands of existing telephone lines to overcome the difficulty of transmitting large amounts of data on voice bands.

At the beginning of the design of the telephone system, it was mainly used to transmit voice calls. For economic considerations, the signal transmission frequency range of the telephone system design is between 300Hz and 3.4kHz-although the human voice frequency can reach up to 15kHz, but 300Hz to The 3.4kHz range is enough to ensure that both parties can easily distinguish each other.

Obviously, the copper cable from the local telephone network to the end user can actually provide higher bandwidth-at least from the lowest frequency to 200kHz, and the specific upper limit ranges from 200kHz to 800kHz, depending on the quality of the circuit and the complexity of the equipment. degree.

Generally speaking, to the end-user splitter, the fewer the connectors, the better the bandwidth; the environment where the line transmission passes, the smaller the electronic interference, the more conducive to the improvement of the line bandwidth.

The telephone network built by AT&T in the sparsely populated United States meets this requirement to a large extent.

The frequency band used by ordinary old telephone service-300Hz to 3.4kHz, DSL will continue to reserve, and then use the frequency outside this range to transmit data.

In this way, while DSL is developing data services, it is also perfectly compatible with the original business functions. You must know that with the current dial-up Internet access, one line cannot make calls and surf the Internet at the same time, and those communication companies that are not aggressive and only care about immediate benefits are hoping that users can apply for an additional line so that they can give themselves an extra coin.

Dial-up Internet connection is the end-to-end telephone connection of users on the public telephone network. It can be described as a user who accesses AOL. Once he dials up successfully, he is directly connected to AOL.

Different from dial-up Internet connection, DSL connection is created between the user's equipment-DSL modem and telephone switch, and then the switch uses some other protocols to establish a connection with the ISP that the user really wants to connect to, such as America Online.

This difference brings a limitation to the seemingly perfect DSL, that is, if the distance between the user and the switch exceeds 5.5 kilometers, the quality of service will drop sharply due to interference.

In other words, the reachable range of DSL service to users-the line length from the telephone switching center to the user, is inversely proportional to the data rate.

It is precisely because of the demanding requirements for hardware processing capabilities of information stream encoding and decoding, such as service distance and other small restrictions, that Tang Huan made CableModem come to the forefront of DSL in terms of commercial use.

It can be said that DSL is still a strategic weapon at present. Tang Huan uses it to ensure his position. When the dial-up Internet speed reaches 56kbps and cannot meet the requirements, the DSL, which is almost perfect, must be taken over.

As for the competitive relationship between DSL and CableModem, Tang Huan didn't bother to worry about it. Anyway, this huge market can't be left and right. In addition to Pacific Telecom and Turner Broadcasting, there are many other players.

In contrast, Tang Huan blended the two solutions together, which is a clever move that takes all parties and makes a steady profit without losing money.

Seeing that Tang Huan had his own considerations in the layout of DSL and CableModem, Ted Turner didn’t try to influence him. After all, the other party must have a better grasp of it than himself. The level is different, so he turned to ask. Matters related to the specific operation of CableModem.

"Although the DVO-1 system is also a brand-new product, it is still in the traditional range of radio and television. Experience can be used for reference, but CableModem is a completely new thing. You can give me something valuable as a pioneer. Suggest."

Tang Huan did not refuse, and nodded: "I think Turner Broadcasting Company can start from itself first and establish an intranet through CableModem, just like Cupertino in Silicon Valley."

Look again in 10 minutes.

...

"Things are concerned about personal interests, and there is no way to choose rude methods." Tang Huan shrugged needlessly. "The scale of Pacific Telecom's analog public telephone network in the western United States is even larger than that of a small country in Western Europe. You can easily give up casually."

Before AT&T was dismantled, it did not rely solely on the monopoly of profiteering corpse-bit vegetarian meals. The telephone network it built across the United States was proud of this super giant, and proved to the federal government that it had a strong interest in the telecommunications industry. The biggest capital where the advantages of monopoly outweigh the disadvantages.

From a famous advertisement at the beginning, we can also see how perfect the quality of the network is: after a mother heard her son's voice on a long-distance call, she almost thought that the other party was by her side, and was moved to tears.

In the process of launching a challenge to AT&T, MCI really couldn’t pick out the opponent’s major faults in terms of service quality. In the end, it could only focus the attack on the expensive communication costs and spoof it. The famous advertisement: When the mother heard her son’s voice, tears were also in her eyes, but it was not out of touch, but worried that AT&T would mail expensive bills the next day.

After AT&T was dismantled, the most valuable asset inherited by the seven "cucurbits" was this network, because the brand and long-distance business were left to the new AT&T.

As the prospects of ISDN are promising, communication companies with complete analog telephone networks like Pacific Telecom are under great pressure. The overall level of communications infrastructure in Europe is not as good as that in the United States. Naturally, there is no need to invest in resources before the distressed. You can rebuild without burden and build a brand new digital network on the rubble of analog networks.

However, Tang Huan knows well. He has a clear roadmap for the development of communication technology. He understands that the traditional analog network does not need to be completely abandoned, and can be transformed and upgraded through DSL technology to provide voice services. The old business model will smoothly transition to a new business model focusing on providing data services, and then continue to make a big profit in the next digital age.

If there was no such support, Tang Huantang's exhaustive purchase of Pacific Bell from AT&T at the time would have been a loss of money.

The principle that DSL technology can provide digital connections through copper wires or local telephone networks lies in the use of additional frequency bands of existing telephone lines to overcome the difficulty of transmitting large amounts of data on voice bands.

At the beginning of the design of the telephone system, it was mainly used to transmit voice calls. For economic considerations, the signal transmission frequency range of the telephone system design is between 300Hz and 3.4kHz-although the human voice frequency can reach up to 15kHz, but 300Hz to The 3.4kHz range is enough to ensure that both parties can easily distinguish each other.

Obviously, the copper cable from the local telephone network to the end user can actually provide higher bandwidth-at least from the lowest frequency to 200kHz, and the specific upper limit ranges from 200kHz to 800kHz, depending on the quality of the circuit and the complexity of the equipment. degree.

Generally speaking, to the end-user splitter, the fewer the connectors, the better the bandwidth; the environment where the line transmission passes, the smaller the electronic interference, the more conducive to the improvement of the line bandwidth.

The telephone network built by AT&T in the sparsely populated United States meets this requirement to a large extent.

The frequency band used by ordinary old telephone service-300Hz to 3.4kHz, DSL will continue to reserve, and then use the frequency outside this range to transmit data.

In this way, while DSL is developing data services, it is also perfectly compatible with the original business functions. You must know that with the current dial-up Internet access, one line cannot make calls and surf the Internet at the same time, and those communication companies that are not aggressive and only care about immediate benefits are hoping that users can apply for an additional line so that they can give themselves an extra coin.

Dial-up Internet connection is the end-to-end telephone connection of users on the public telephone network. It can be described as a user who accesses AOL. Once he dials up successfully, he is directly connected to AOL.

Different from dial-up Internet connection, DSL connection is created between the user's equipment-DSL modem and telephone switch, and then the switch uses some other protocols to establish a connection with the ISP that the user really wants to connect to, such as America Online.

This difference brings a limitation to the seemingly perfect DSL, that is, if the distance between the user and the switch exceeds 5.5 kilometers, the quality of service will drop sharply due to interference.

In other words, the reachable range of DSL service to users-the line length from the telephone switching center to the user, is inversely proportional to the data rate.

It is precisely because of the demanding requirements for hardware processing capabilities of information stream encoding and decoding, such as service distance and other small restrictions, that Tang Huan made CableModem come to the forefront of DSL in terms of commercial use.

It can be said that DSL is still a strategic weapon. Tang Huan uses it to ensure his position. When the dial-up Internet speed reaches 56kbps and cannot meet the requirements, ~www.readwn.com~ DSL which has been almost perfected must be connected. good job.

As for the competitive relationship between DSL and CableModem, Tang Huan didn't bother to worry about it. Anyway, this huge market can't be left and right. In addition to Pacific Telecom and Turner Broadcasting, there are many other players.

In contrast, Tang Huan blended the two solutions together, which is a clever move that takes all parties and makes a steady profit without losing money.

Seeing that Tang Huan had his own considerations in the layout of DSL and CableModem, Ted Turner didn’t try to influence him. After all, the other party must have a better grasp of it than himself. The level is different, so he turned to ask. Matters related to the specific operation of CableModem.

"Although the DVO-1 system is also a brand-new product, it is still in the traditional range of radio and television. Experience can be used for reference, but CableModem is a completely new thing. You can give me something valuable as a pioneer. Suggest."

Tang Huan did not refuse, and nodded: "I think Turner Broadcasting Company can start from itself first, and establish an intranet through CableModem, just like the Cupertino in Silicon Valley." (To be continued. .)