Chapter 223 What’s the news? There are still documents
Everyone present, including Li and Chi, were a little stunned by Gao Zhendong’s series of moves. Got something? 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 an ftp server, and the files are retrieved from that server.
Everyone was eagerly watching his series of operations, wanting to see what his next surprise would be.
Seeing the connection information on the monitor, Chief Engineer Chi and Director Li were communicating quietly.
"FileTransferProtocol? File transfer protocol?"
"Yes, it seems that he has even figured out the transfer of files. He can send messages and files. Basically, they are commonly used in work. I can handle all the scenarios.”
“I don’t know how smart Director Gao is.”
“Our printer is going to speed up. Compared with Director Gao, Our progress is a bit embarrassing.”
"Yes, yes."
Amid everyone's discussion, Gao Zhendong had logged into the ftp server and typed the get command.
getTestFile
Everyone still knows this in English.
"get? Get?"
"Are you trying to get something from the other side?"
"TestFile? Test file? Are you trying to get a file back from the other side?"
At this time, even if it is not serious, The director and Chief Engineer Chi reacted so quickly, but even belatedly realized the "seriousness" of the matter.
The file is not large, and even at a speed of about 100 bytes/second, the progress bar runs very fast.
Everyone is still quite curious about this progress bar.
"Director Gao's prompt method is well designed. Although I don't know what he is doing, I can guess at once that it is showing the degree of completion."
"Yes, what Director Gao wrote is more than The function is good, and it is very comfortable to use.”
These words made Gao Zhendong feel a little embarrassed. According to the standards of his previous life, his handling of the UI (User Interface) was actually relatively rough. , that is, better than people today.
The progress bar quickly ran out. Gao Zhendong exited the ftp client program and opened the TestFile file with a Chinese editing program.
This also expresses one thing to everyone. The subsequent operations and results have nothing to do with the previous test program, and 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 “Internet of Everything!”
No matter how lazy the content is, everyone knows that this is the content that comes after the file is retrieved, and it is not Gao Zhendong’s copy and paste here. Yes, after all, everyone is witnessing all his operations.
People were quiet for a moment, and then burst into louder cheers.
“You can also retrieve files from a distant computer, haha, this program is so useful.”
"If my work has a computer and there is a computer at home, then I can process the work's files at home."
"What the hell, how can you have a computer at home?"
"I'm just making an analogy, understand?"
"Next time we go to a unit with this set of equipment, so we don't have to run around with tapes, and the security is much higher. There are so many.”
When Gao Zhendong heard this, he almost wanted to tell him that the safest thing was to run away with the tape. And if the amount of data is large, you have to carry tapes with you.
There is an interesting fact that many people are not aware of. When it comes to transmitting massive amounts of data to a different place, it is the fastest to remove the hard drive and transport it there. No broadband can be as fast as this method. Of course, the premise is the amount of data. Big enough.
Director Li had already thought of some of the joints and asked Gao Zhendong with a smile: "Director Gao, if I can get it back, can I still send it to you?"
Gao Zhendong nodded with a smile. Head: "Yes, the get command is for retrieving, and there is a put command for sending. Come on, come on, do you want to try?"
Director Li sat down on the operating chair with great interest, and then Under the guidance of Gao Zhendong, I uploaded a file I wrote.
Then Chief Engineer Chi came over to cooperate, and under the command of Gao Zhendong, he retrieved the files from the server.
When the two of them looked at the document on the screen that had exactly the same content as what they had compiled, they laughed from ear to ear.
If sending text messages is just an icing on the cake at this stage due to computer cost issues, then the function of transferring files is a real office tool.
If Gao Zhendong knew what they were thinking, he would tell them, no, no, no, for things like MIS (Management Information System), C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance, Reconnaissance), Collection Control For systems like this, the transmission of real-time messages is much more important than the transmission of files.
But it’s still early, just do it bit by bit and guide it bit by bit. There are a lot of things you can do, enough to keep you busy for many years. Manager Chi remembered an important question and asked Gao Zhendong: "What is the communication distance of this?"
Gao Zhendong smiled and said: "The phone can reach as far as it goes."
This sentence made Director Li and Chief Engineer Chi take a breath.
Gao Zhendong explained: "The reason why telephone calls can reach thousands of kilometers is because there are relay amplification equipment along the way. This thing actually uses the relay amplification equipment of the telephone."
More Gao Zhendong didn't mention the complicated stuff. In the future, digital phones will use a bandwidth of about 64kbps, while analog phones will occupy a bandwidth of about 4000Hz.
Although both are bandwidth, digital communication and analog communication use two different methods to measure bandwidth.
What is used now is an analog phone with a bandwidth of 4000Hz. For a baud rate of 1200bps, according to Shannon's theorem, it does not require a high signal-to-noise ratio to ensure transmission, so it can be transmitted very far. Combined with relay amplification, Just further.
To put it simply, under the same conditions, the lower the rate, the farther the transmission.
This is also the reason why Gao Zhendong’s Modem uses a baud rate of 1200. Make sure it is passed first.
Director Li suddenly remembered something when he heard Gao Zhendong's words.
He said to Gao Zhendong: "Director Gao, you should put all these things away, including the modem and related programs. Your place is safer."
He vaguely knew that Gao Zhendong was armed with a gun.
Seeing that Gao Zhendong was a little puzzled, he explained: "The significance of this matter is comparable to that of DJS-59, or even more so. The sensitivity is also very high. It may be used first. , I don’t say you know it. So it’s more appropriate to leave it with you for the time being. I’ll report it first. The specific arrangements are not something we can decide.”
As expected of the director of the computing institute, The significance and sensitivity of this technology came to mind immediately.
Unlike other computing office staff present who thought this was just ancillary 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. There is me and you among me.
And the sensitivity mentioned by Director Li is not an exaggeration at all. We can get some clues from the situation of Lao Maozi OGAS.
Seeing that Gao Zhendong understood what he meant, Director Li turned around and said with a smile: "Comrades, Director Gao has opened our eyes today. In order to congratulate him on the birth of his achievements, we will have a good meal in the cafeteria at noon. . ”
Everyone felt a little confused by Director Li just now. They were not active in eating and had brain problems.
Especially the two people who came to support us from the Communications Institute did not expect such a good thing.
While eating, Director Li informed Gao Zhendong about the C language training preparations. They knew that Gao Zhendong was getting married, so they arranged it after his wedding date as he wished.
However, they all know that this matter cannot be delayed. Looking at Gao Zhendong's achievements one after another, it can be predicted that in the future, various industries will need a large number of programmers.
The people who came to the Communications Institute for support returned to the Communications Institute and reported the test situation to the leaders.
“You are saying that the equipment of the computing center can achieve a telegraph-like effect through telephone lines?”
“Well, yes, leader, and I saw it, that thing is really good. , much faster than the telegraph."
"Faster than the telegraph?"
"Well, I saw that as long as the two sides of their equipment are connected, people can type much faster. It’s as fast as it can be sent. It’s much faster than sending codes, copying codes, and decoding telegrams.”
One of the reasons why the fee for telegraphing in Chinese characters is high is that it is really slow and expensive.
A skilled telegraph operator can send 120 codes in one minute, but these 120 codes do not represent 120 words.
Except for encrypted messages, plain code telegrams for civilian use are somewhat similar to a very classic but very useful dictionary search method - the four-corner number method, in which a Chinese character is represented by 4 numbers or 3 letters. .
This means that only 30 to 40 words can be sent in one minute, but this is not over yet. There is still time for the copywriter on the opposite side to copy the newspaper and then translate it into the text.
No matter how skilled you are, this process is still slower than sending data directly through the digital communication network.
This made the leader of the Institute of Communications a little excited: "Then we can cooperate with them and research something."
They are all electronic units, so it is easy to discuss. This is not what he wants to pick. Tao Zi, etc., but really want the two companies to join forces to effectively solve the civil communication problem.
Unexpectedly, the support staff poured cold water on him with just one sentence: "No chance. Firstly, we need their computer. Secondly, according to their director, this thing is a bit high-level." Gao, a little sensitive, they don't even dare to keep the relevant things themselves, they only dare to report the good news to the superiors. "
When the leaders of the Communications Institute heard about it, they wanted a computer? Farewell! !
Just kidding, they also got two DJS-59s. They are easy to use, but the price is really outrageous. They want to use them as civilian communication equipment, but they really can’t afford them now.
At this time, the Computing Institute had already reported the modem and message and file transmission matters to the 12th Machinery Department through confidential channels.
(End of this chapter)