Chapter 223 What's the news? There are also documents
Everyone present, including Li and Chi, was a little stunned by Gao Zhendong's series of moves. What else? You never take a break, right?
Gao Zhendong walked to the computer and started the FTP client program on the tape.

This time it's the other way around. The DJS-59 located in Chief Engineer Chi's office is the FTP server, and we retrieve files from that server.

Everyone watched his series of operations eagerly, wanting to see what his next surprise would be.

Seeing the connection information on the monitor, Chief Engineer Chi and Director Li were talking in a low voice.

"File Transfer Protocol? File Transfer Protocol?"

"Yes, it seems that he has even figured out how to transfer files. He can transfer messages and files. Basically, he can handle all the common scenarios in work."

"I really don't know what's wrong with Director Gao's brain."

"We need to speed up our printer. Compared to Director Gao, our progress is a bit embarrassing."

"Yeah yeah."

Amid the discussion, Gao Zhendong had already logged into the FTP server and typed the get command.

getTestFile
Everyone knows this English.

"Get? Get?"

"Is this something you want to get from the other side?"

"TestFile? Test file? Are you going to get a file from the other side?"

At this moment, even if they did not react as quickly as Director Li and Chief Engineer Chi, they still realized the "seriousness" of the matter even if they were slow to react.

The file is not large, and the progress bar runs very fast even at a speed of about 100 bytes per second.

Everyone is still finding this progress bar quite novel.

"Director Gao's prompt method is well designed. Although I don't know what he is doing, I can immediately guess that it is to show the degree of completion."

"Yes, what Director Gao wrote is not only functional, but also very comfortable to use."

This made Gao Zhendong feel ashamed. Judging from the standards of his previous life, his handling of UI (User Interface) was actually quite rough, only slightly better than that of people today.

The progress bar finished quickly, Gao Zhendong exited the ftp client program, and opened the TestFile file using a Chinese editing program.

This also shows everyone one thing: the subsequent operations and results have nothing to do with the previously tested procedures, which can better prove the authenticity of the results.

After the TestFile file is opened, the content is also very lazy.

That’s hundreds of repetitions of “Everything is connected!”

However, no matter how lazy the content is, everyone knows that this is the content that existed when the file was retrieved, and it was not copied and pasted by Gao Zhendong here. After all, everyone saw all his operations with their own eyes.

There was a moment of silence, and then there was even louder cheering.

"It can also retrieve files from a remote computer. Haha, this program is so useful."

"If my workplace has a computer and my home has a computer, I can handle the workplace's documents at home."

"What the hell, how can you have a computer at home?"

"I'm just making an analogy, an analogy, understand?"

"Next time we go to a unit that has this equipment, we won't have to carry the tapes with us, and it will be much safer."

When Gao Zhendong heard this, he almost wanted to tell him that the safest way was to take the tape with him. And if the amount of data was large, he should take the tape with him.

An interesting fact that many people don’t realize is that when you need to transfer massive amounts of data to a different location, the fastest way is to remove the hard drive and transport it there. No broadband can match the speed of this method. Of course, the premise is that the amount of data is large enough.

Director Li had already thought of some of the connections, and asked Gao Zhendong with a smile: "Director Gao, if we can get it back, can we send it back?"

Gao Zhendong smiled and nodded: "Yes, the get command is to retrieve, and there is a put command to send. Come on, come on, why don't you try it?"

Director Li sat down in the operating chair with great interest, and then, under the guidance of Gao Zhendong, uploaded a file he had written.

Then Chief Engineer Chi came over to cooperate, and under Gao Zhendong's command, the file was retrieved from the server.

When the two looked at the document on the screen, which had exactly the same content as the one they had compiled, they couldn't stop laughing.

If sending text messages is just a nice-to-have feature at this stage due to computer cost issues, then the file transfer feature is a real office tool.

If Gao Zhendong knew what they were thinking, he would tell them, no, no, no, for systems such as MIS (Management Information System), C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance, Reconnaissance), and acquisition control, the delivery of real-time messages is much more important than transmitting files.

But it's still early, so let's do it step by step, guide it step by step. There are many things that can be done, enough for me to work on it for many years. Chief Engineer Chi remembered an important question and asked Gao Zhendong: "What is the communication distance of this?"

Gao Zhendong smiled and said, "How far the call can reach is how far the transmission can reach."

These words made Director Li and Chief Engineer Chi gasp.

Gao Zhendong explained: "The reason why the phone can make calls thousands of kilometers away is because there are relay amplification equipment along the way. This thing actually uses the relay amplification equipment of the phone."

Gao Zhendong did not mention something more complicated. In the future, digital telephones will use a bandwidth of about 64kbps, while an analog telephone will occupy a bandwidth of about 4000Hz.

Although both are bandwidth, digital communication and analog communication use two different methods to measure bandwidth.

The analog telephones we use now have a bandwidth of 4000Hz. For a baud rate of 1200bps, according to Shannon's theorem, a very high signal-to-noise ratio is not required to ensure transmission, so the transmission can be very far. Combined with relay amplification, it can be even farther.

Simply put, under the same conditions, the lower the rate, the farther the transmission can be.

This is also the reason why Gao Zhendong's modem uses a baud rate of 1200, to ensure that it is connected first.

When Director Li heard Gao Zhendong's words, he suddenly remembered something.

He said to Gao Zhendong, "Director Gao, please put away all these things, including the modem and related programs. It will be safer where you are."

But he vaguely knew that Gao Zhendong was equipped with a gun.

Seeing Gao Zhendong was puzzled, he explained: "The significance of this matter is comparable to that of DJS-59, or even more so. It is also very sensitive. You already know where it might be used first, even without me telling you. So it is more appropriate to keep it with you for the time being. I will report it first. The specific arrangements are not something we can decide."

As expected of the director of the Institute of Computing, he immediately realized the significance and sensitivity of this technology.

Unlike other computing institute staff present who thought that this was just an auxiliary technology of computers, in fact, digital communication technology is a branch of information technology that is parallel to computers. The two actually support and promote each other.

Moreover, the sensitivity that Director Li mentioned is not an exaggeration at all. We can get some clues from the situation of the Russian OGAS.

Seeing that Gao Zhendong understood what he meant, Director Li turned around and said with a smile: "Comrades, Director Gao has really opened our eyes today. To celebrate the birth of his achievement, let's have a good meal in the cafeteria at noon."

Everyone's mood, which had been a little confused by Director Li just now, suddenly improved. He was not active in eating and there was something wrong with his brain.

Especially the two people who came over from the Communications Institute for support, they didn’t expect such a good thing to happen.

During the meal, Director Li informed Gao Zhendong about the preparations for the C language training. They knew that Gao Zhendong was going to get married, so they arranged it after his wedding date as he wished.

However, they all knew that this matter could not be delayed. Looking at Gao Zhendong's achievements one after another, it can be predicted that a large number of programmers will be needed in all walks of life in the future.

The people who came from the Communications Institute to provide support returned to the institute and reported the results of the experiment to their superiors.

"You mean the equipment in the computing office can achieve a telegraph-like effect through telephone lines?"

"Yes, that's right, sir. And I've seen it. It's really good. It's much faster than a telegraph."

"Faster than the telegraph?"

"Well, I saw it. Once the two sides of their equipment are connected, the speed of transmission is as fast as the typing. It is much faster than the telegraph in sending, copying and decoding codes."

One of the reasons why sending telegrams using Chinese characters is so expensive is that it is really slow and costly.

A skilled radio operator can send 120 codes per minute, but these 120 codes do not mean 120 words.

Putting aside encrypted telegrams, civilian plain text telegrams are somewhat similar to a very classic but very useful dictionary lookup method - the four-corner number method, which represents a Chinese character with 4 numbers or 3 letters.

This means that only 30 to 40 words can be sent in one minute, but that’s not all. There is also the time for the reporter on the other side to copy the message and then translate it into the text.

No matter how skilled you are, this process is still slower than sending data directly through a digital communications network.

This made the leaders of the Institute of Communications a little excited: "Then can we cooperate with them and research something?"

They are both electronic units, so it's easy to negotiate. It's not that he wants to take advantage of others, but he really wants the two companies to join forces to actually solve the problem of civilian communications.

Unexpectedly, the support staff poured cold water on him with just one sentence: "No hope. First, we need their computer. Second, according to what their director said, this thing is a bit high-level and sensitive. Even their institute doesn't dare to keep the relevant things on its own now. They can only report the good news to their superiors."

When the leaders of the Institute of Communications heard this, they asked, "You want a computer? Goodbye!"

Just kidding, they also got two DJS-59s. They are useful, but the price is really outrageous. If you want to use them as civilian communication equipment, you really can't afford it now.

At this time, the Institute of Computing had already urgently reported the matters concerning modems, messages and file transmissions to the 12th Ministry of Machine Building through confidential channels.

(End of this chapter)