Chapter 816 "19491001"
These words made Mr. Feng very unbearable: "General Engineer Gao, what are you talking about? If you have to do all these tedious things in person, then there will be dozens of people in our research group at the Institute of Communications. There’s no room for my face.”
In desperation, he even used honorifics. Mr. Gao really couldn't afford these words.
"No matter what, you still sweat more in this job than me. How about it, do you have confidence today?"
"We have sweated a little, and you have racked your brains. There is no comparison, no comparison. But in today's meeting, I am quite confident, hahaha." When it comes to this, Mr. Feng is not modest. You are On our end, big things are set.
The entire process of the acceptance meeting was as expected by Mr. Feng. Starting from the results report, the acceptance personnel basically gave the green light all the way.
It’s not like there weren’t questions asked, but these questions were more like consultations than questions.
The questions raised by acceptance experts are probably the following.
"What's going on in this place? Explain it and let me learn."
"So this problem can be solved like this? What is the principle? I understand."
“I’ve learned, I’ve learned, this is how this problem needs to be solved.”
"Is it really that fast? Is the performance really that good? It's amazing. It's amazing."
"..."
Gao Zhendong sat in his seat, basically saying nothing, there was no need for him.
The atmosphere in the whole venue was harmonious and very harmonious.
When the meeting process entered the presentation stage, the atmosphere reached a climax.
You can't see the effect when calling outside, because outside the Communications Institute, all the telephone offices outside are still manually switched, and the experience is not obvious.
But if you want to see the effect, you don't need to call outside. Comrades from the Communications Institute directly put the phone at the venue.
For the experts and comrades who participated in the meeting, if the Institute of Communications did not have any direct feelings when the report was introduced, then when the comrades from the Institute of Communications took out the phone and put it on the test bench and started wiring, they already felt it. Here comes the difference in this exchange system.
——Except for a few of these telephones, most of them have neither the hand-cranked generator cranks used to generate electricity and connect to the service bureau, nor the more advanced dial dials.
Instead, there is a small keyboard with sixteen keys and mainly numbers.
"Push-button dialing?" an expert asked in surprise.
"Yes, Comrade Expert, the standard configuration of our system is this kind of touch-tone dialing keyboard, which has fast dialing speed and low error dialing rate. An ordinary person can dial six digits in two seconds. The dialing speed is not affected by the number of the phone number,” said a comrade from the Institute of Communications.
In the past, even with the most advanced dial-up phones, if you dialed six "9"s, the speed would make people die. This is why the first two digits of our emergency numbers are usually 1 or 2. Since the era of dial-up dialing, The remaining digits should be dialed quickly. As for the last digit being "0" or "9", this is mainly to prevent misdialing.
Several experts were pressing the buttons on the touch-tone phone with great interest, like children who got a new toy.
"Hey, this is convenient, this is convenient."
"Even if you dial the wrong number, the speed of redialing is very fast, good!"
They have not yet felt the advantages of program-controlled automatic switching, but a simple change in the terminal equipment makes them feel that this thing is really different.
"If I dial too fast, will the device fail to respond?" An expert still knows something about dial telephones.
"In order to be compatible with dial telephones, our central office switch does make the upper limit of the pulse width of the dialing pulse relatively large, but don't worry, we also make the lower limit relatively low. In theory, you have to press more than 40 keys in one second. , it is possible to break through its design limits. "The comrades of the Institute of Communications are full of confidence.
"But if this happens, will the previous dial telephones and hand-crank telephones have to be replaced?" The compatibility and recycling of equipment is a great knowledge and a very important feature.
"Don't worry, at the central office of the program-controlled exchange, we have specially made a compatibility design for the old dial telephones, which can be connected smoothly. However, the hand-cranked telephone is more troublesome and requires a manual front end to connect, so the program-controlled If the user terminal under the phone is a hand-cranked telephone, it is It is recommended to replace it. But this is not a big problem. The lines of this system are fully compatible with the previous telephones. The production cost of touch-tone telephones is much lower than that of hand-crank telephones. After the central office switch is replaced, the user-end equipment will be 1 It’s not a big problem to replace it with 1.”
This is one of the truly terrifying aspects of microelectronics technology. Once a product reaches scale, its actual cost is often much lower than that of pure mechanical equipment with corresponding functions. Maintenance is also simpler, and the life-cycle cost advantage is extremely obvious. "What is the name of this dialing keyboard technology? I just heard you introduce it as dual tone multi-frequency, right?" An expert seemed to have remembered something.
"Yes, dual tone multi-frequency recognition technology."
"Our unit recently used a remote control device. I remember that it also used dual-tone multi-frequency technology for identification and control. I didn't expect that you would actually use this advanced technology in such a detailed way. The technology has been digested and absorbed. The speed is very fast.” The expert praised the Institute of Communications’ speed of digesting and absorbing new technologies.
When these words were said, the faces of the comrades from the Institute of Communications were a little subtle. After thinking about it, they still said it.
"Comrade expert, you are actually saying the opposite. This dual-tone multi-frequency technology was first developed by our Chief Engineer Gao Zhendonggao to solve the problem of telephone dialing speed. Remote control, low-speed data transmission, etc., are instead its Side businesses are some additional applications that we expanded after acquiring this technology.”
It sounds weird to say this, and it will definitely not feel like this decades later, but nowadays, a cutting-edge technology that can remotely control and transmit data is actually a by-product of telephone dialing. This fact is very common to ordinary people. Hard to accept.
Sure enough, this matter made all the experts silent. After a while, the one just now said in shock: "Huh? What is the origin of this thing? Such advanced technology was just for dialing a phone number at the beginning? This is a reverse example of buying a casket for a pearl.”
The comrades from the Communications Institute nodded without saying much.
There's nothing they can do about it. Who knew Chief Engineer Gao was so heroic? These advanced features you mentioned, I didn't take a fancy to at the beginning and didn't even think about them. This thing was created by him in order to speed up the dialing speed.
However, some people are from the 12th Ministry of Machinery. Telecommunications and telecommunications are inseparable. To accept the results of the Institute of Communications, it is normal for some people to come from the 12th Ministry of Machinery. These comrades are hearing the dual-tone multi-frequency technology. When I saw the inventor, I felt relieved.
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"Ah, Mr. Gao did it. That's no wonder. He has the confidence. Many things that we think are anti-aircraft cannons to kill mosquitoes are nothing to him." Looking at Lehehe sitting on the side, Gao Zhendong was basically silent, while several comrades from the 12th Machinery Department showed understanding expressions.
Did they say nothing? There is no need to speak.
While talking, all the phones have been connected and placed in front of the experts. There is also a piece of paper attached to each phone, which is the phone number assigned to each phone by the program-controlled switchboard.
A red phone was left on a separate stand.
The comrades from the Institute of Communications said to the acceptance team leader: "Comrade team leader, you can try it now. Use the phone in front of you, or any phone, to dial 19491001. This is the number of that separate phone."
In order to highlight the advantages of touch-tone dialing, comrades from the Institute of Communications assigned a huge 8-digit number to each phone despite the upper limit on the length of phone numbers. For the single phone, they specially assigned a very special number.
"19491001? Ah, I understand, I understand."
Under the guidance of comrades from the Institute of Communications, the expert team leader grabbed the phone in front of him and pressed a series of numbers with a trembling hand.
What happened next made all the acceptance personnel feel extremely unreal. Just after the expert team leader pressed the last button, within a few seconds, the red phone 19491001 made a "beep beep beep beep" sound. sound.
The speed was so fast that everyone even had the illusion that "what a coincidence, someone actually called in at this time."
It's too fast, it's really too fast. Although we know that program-controlled switches do not require manual communication, exchange, and connection, this speed is still beyond everyone's expectation, so much so that they have such an illusion that they can't even imagine that it will happen in a few seconds. Can answer a phone call.
However, people quickly realized that there might be a call coming in. This was an experimental device and it was not connected to the outside at all.
An acceptance expert strode forward and picked up the phone.
"Hello..."
The clear sound coming from the microphone was intertwined with the original sound in the same space, giving the expert team leader a wonderful feeling.
Only then did the other acceptance personnel react. Damn it, I miscalculated, I miscalculated, and he got the better of me.
This matter will be placed decades later, and various relevant research and historical materials will probably write like this - "As Comrade XXX solemnly pressed the number '19491001', Comrade YYY answered the phone on the other end, which means that our country The first program-controlled telephone exchange officially entered the stage of serving the masses.”
grass! grass! grass! The opportunity to leave a name in history was just snatched away. Although this "history" is not my own, and it is only historical data of an industry, let me ask you if this name is my own.
The expert who reacted the fastest and got first place had a smile that was so bright that it was dazzling.
(End of chapter)