When Li Sanbiao saw the many computers, he asked for a microcomputer.

This is an 8086 computer. The microcomputer operating system is the CP/M system developed by a Seattle company, which is the predecessor of Dos and has now been sold to Microsoft.

I installed the original Autocad 1.0, but this software is worse than drawing.

In front of everyone, Li Sanbiao used software to gradually draw the circuit diagram on the computer while explaining it.

The core of the programmable machine is still the chip, but the 738 factory does not have a photolithography machine.

Li Sanbiao said: "This is the chip design drawing. You can take it to the 878 factory to produce it yourself, or I can provide it. We will supply it to you according to the quantity you want."

The 738 factory director smiled and said, "How could I trouble them? What if 8.78 million sells this chip to another factory? You should provide it to us!"

The Wanmen switch developed by Li Sanbiao is still a space-division switch, exchanging voice analog signals instead of digital signals.

Because compatibility with the entire system must be considered.

Most rural areas now use manual switches with less than 100 switches. If they were converted to digital switches, most areas in the country would be unable to communicate, and there would not be computers powerful enough to process data.

Li Sanbiao made another request, that the computer should belong to him, otherwise he would not be able to design it.

As for the design results, you can copy them to the other party through a floppy disk.

Factory 738 makes computers, so giving him one is not a big deal.

The director of Factory 738 personally drove Li Sanbiao back in a van and watched him create a chip with his own eyes.

The switch chip can be made very large, and there is no need to implement any special algorithms. It is easy for Li Sanbiao.

In fact, apart from the chip, the structure of advanced switches is much simpler than the vertical and horizontal switches.

So within one day, the country’s first 10,000-door air-division program-controlled switch was successfully developed!

The director of 738 Factory told him to keep this matter confidential and not to give the switch technology to anyone else, not even to other brother manufacturers.

How could Li Sanbiao be stupid and urge the factory director to go to the telegraph building quickly?

The Telegraph Building is the national communication center. It is located on Chang'an Street. There is a large Western-style bell on the top. The bell of the Telegraph Building was once a symbol of major events in the Dragon Kingdom.

For example, at the ceremony of Xiangjiang's return to the Dragon Kingdom, at midnight on July 1st, the bell of the Telegraph Building rang at midnight.

This building has quite a Shanghai-style architectural style. There is also a legend that Big Brother's engineers at that time did not know the east, west, and south, so they built the north and south upside down. As a result, its exit did not face Chang'an Street.

When I came to the Telegraph Building, I saw that the business hall was packed with people, and the people queuing up actually came with lunch boxes, which was even more exaggerated than a bank buying treasury bills!

There are only one or two lines from Sijiu City to each province. You have to get to the provincial bureau before you can connect to the municipal bureau. They are transferred layer by layer. Many people can’t get through after trying for an hour and a half.

If this doesn't work, we can only manually transfer the call. The operator wears large headphones on his ears and a microphone commonly known as a "horn" hanging around his neck, and constantly communicates with Shanxi.

Moreover, there was no soundproof room at that time. All the phones were lined up in the lobby. The voices of the callers interfered with each other, and the lines themselves were not clear.

It was difficult to get on the line, and I had to shout as loudly as if I were having an argument, otherwise the other party couldn't hear me at all.

Li Sanbiao was a little overwhelmed when he saw it. It was too difficult to make long-distance calls. This was in sharp contrast to the scene in the streets of Sijiu City where there were more telephones than toilets.

The director of 738 took Li Sanbiao into the office area. The confidential area is not open to the public.

Li Sanbiao registered five or six forms and had his household registration checked several times before he was allowed to enter the office area.

In fact, this is a one-sided misunderstanding of the Telegraph Building, not just the entrance.

The whole building is a maze-like building. According to normal thinking, it is impossible to reach where you want to go.

For example, if you think there is a wall where you can pass, you will find that the corridor is actually a dead end.

Moreover, at any unexpected corner, you will be stopped by guards coming out of nowhere to question you.

The director of Factory 738 is obviously a regular customer. Every time he meets the guard, he just says hello and passes by.

After walking around for a long time, I arrived at the supervisor's office.

The 738 factory director reported on the latest research progress, saying that Wanmen program-controlled switches have been successfully developed.

The supervisor said in disbelief: "What? You're not mistaken! It's a program-controlled switch? Isn't it a vertical and horizontal type?"

The 738 factory director pushed Li Sanbiao forward and said: "Well, thanks to our Comrade Li Sanbiao, we can step into the world's advanced level so quickly!"

The supervisor was not excited at first, but suspicious. He was very clear about the strength of Factory 738.

"Let me tell you, there is no time to launch satellites now! Did you replace the imported switches with shells and assemble them?"

"We are not short of money. If we could import, we would have imported it a long time ago. Our building is not only a C1 bureau, but also a C0-level institution. Did you know? All are connected to all other provinces. We do not seek advancement, but seek jobs.

The condition is stable and reliable, and it must be made in China!"

The network level of my country's telephone network is divided into five levels, consisting of level 1, level 2, level 3, and level 4 long-distance switching centers and level 5 switching centers.

Among them, the country is divided into eight regions, and each region has a regional center.

That is, Bureau C1 of the first-level switching center.

Each region includes several provinces, and each province has a provincial center as the secondary center C2.

Each region in the province has a regional center, which is the third-level exchange center C3.

Each county has a county center, which is the fourth-level exchange center C4.

Local village calls and local calls are collected at the end office, where citizens line up to pay their phone bills, which is the C5 office.

In addition, there are three international export bureaus, located in Sijiucheng, Shanghai and Guangcheng.

The Telegraph Building is not just the C1 Bureau, it has higher requirements for localization.

In the eyes of leaders, vertical and horizontal switches are just larger and take up more space in the computer room, but all lines are visible to the naked eye. When they are broken, they can even be connected manually, which is more reassuring.

Li Sanbiao said very confidently: "The leaders can rest assured on this point, we guarantee that this is completely domestically produced!"

The supervisor said: "Then, can you produce one in front of me and show it to me? If this is true, of course we will fully adopt it!"

Li Sanbiao said: "No problem, you can come and visit now!"

The supervisor was stunned for a while, it didn’t look fake.

This is much better than the people in the 738 Factory. They always hide things in secret and even refuse leaders to visit the workshop. They are not as open-minded as Li Sanbiao.

The 738 factory director hurriedly said: "Leader, after you read it, you can't tell other brother units!"
Chapter completed!