Chapter 817 International Leading and Next Step
"Clear, very clear!" The acceptance team leader said a few words to the other end of the red phone, and his mood was very high.
After speaking, he turned to greet everyone: "Let's all try calling each other. Everyone should dial a few more numbers. By the way, dial the wrong number as well."
This requirement is also to cement the fact that program-controlled switches are successful.
If only two phones can dial each other, it may be that a direct line is used, but if it can be connected cross-connected, and the number and phone can be matched, and the wrong number cannot be connected, then it can basically prove that this thing can really be used.
As for the length of communication lines that can be supported, etc., these are not issues. That is a matter of line equipment, amplification, relay, and regeneration. There is no need to worry about these here.
For a time, the venue was extremely lively. This was the first time in history that phone numbers were exchanged live on a large scale.
"Old X, how much do you have?"
"Old Y, mine is XXXXXXXX, don't remember it wrong."
"Why can't I get through? Oh, I dialed the wrong number."
"It's clear."
"Hey, old C, can you hear me clearly?"
"You can hear me clearly! Why can't I hear you clearly when you call me right next to my ear? If you can hear me clearly with your ears, you can also hear me clearly through the phone!"
The venue was a mess, mixed with the unique "beep" sound of the touch-tone phone, various sounds one after another, and occasionally the "ding-ring-ring" sound of the two independent dial phones.
No test report is as real and real as making a phone call yourself.
After a while of commotion, the acceptance personnel put down the phone with unfinished content. It’s a new toy, and who doesn’t want to play with it for a while?
"How many phones can this device support?" asked the acceptance team leader.
In the report, he learned that this equipment can support a wide range of doors from 100 to 20,000 doors. He wanted to know how many doors it could support based on the size of the equipment at the venue.
"This is the upper limit of the minimum scale, 800 doors. By expanding the mainframe and switching cabinet, it can be expanded to 6,000 or even 20,000 doors. To be honest with the experts, within our Communications Institute, except for the manual exchange of export exchanges, Communication relies on a 400-door program-controlled switchboard to complete the switching of telephone communications in the hospital. ”
You should test it on yourself first, you should, you should.
As for the manual exchange of exports, there is nothing you can do about it. Everyone uses manual exchange. If you don't do manual exchange, you can't even call in or out.
"Can such a small piece of equipment complete the switching task of 800 telephones?" If 800 telephones were manually switched, it would take a large room and a lot of manual switches and operators to complete it.
Putting aside operating costs such as operator wages and maintenance of so many devices, the cost of the equipment itself is enough to make up for it, not to mention other marginal costs such as power supply and space.
If you calculate it carefully, you can save a lot of money.
Of course, what we are talking about here is the cost, not the selling price. The selling price is another matter, especially in the early days of the emergence of a technology.
The Communications Institute has its own switchboard, which makes comrades in other units envious. To be honest, it is not a very pleasant thing to deal with an operator who is emotionally unstable after a busy day. If either of the two parties has an accent, That's more troublesome.
Even if the operator is emotionally stable, the time saved by this switch is a fortune.
"We have tested that even if the two ends of the call are cascaded through multiple program-controlled switches, the connection speed is similar to what everyone experienced when making calls just now." Comrades from the Institute of Communications laughed.
"Okay, great. This thing needs to be promoted as soon as possible. Even if we don't promote it, we can start testing it. Our unit can be a test product for you. The funding is there. Let's develop our style and we'll come out. Then we won't It’s an added burden for you,” the acceptance team leader said cheerfully.
Comrades from other units quit their jobs. I can hear your calculating voice even outside Sijiu City!
"We can do it too."
"Yes, yes, the work of their unit is important and cannot be delayed easily. We should do this experimental thing first, and they will wait until it is stable."
"We can do it too. Our scale is small. 100 doors are enough. It can achieve the trial effect without investing too much."
"..." For a time, people at the venue scrambled to show off their style and become the "guinea pig".
Seeing that the scene was a bit chaotic, the leader of the Postal and Communications Commission who was sitting here patted the microphone and said: "Comrades, thank you very much for participating in our trial work. We will talk about this later. We will come up with a small-scale trial plan when the time comes. All brother units are welcome to sign up. Now we have to do the inspection and acceptance.”
This is the top priority of the Postal and Communications Commission in terms of advanced equipment. He is personally in charge of it. This is a very normal attitude. It would be strange if he didn't come.
Not only him, but also the chief engineer of the Postal and Communications Commission also came. With his skills, it was normal for him to make a scene during the acceptance inspection. However, he was not put to much use. Basically, the research team themselves used the experts' After the problem is solved, he has the effect of expressing his attention.
The leadership level is still high. Applications are open, but we won’t discuss the matter here. We will communicate slowly, come up with a unified plan, and formulate relevant requirements and standards. When the time comes, it will be up to you to show your magical powers.
Moreover, this kind of equipment is definitely used most by the Postal and Communications Commission itself. Other units can only manage it internally. The Postal and Communications Commission is responsible for the whole country. The promotion of this thing is destined to be a long process, mainly due to money issues.
Only then did the comrades come to their senses, and the matter was pulled away.
"Well, yes, let's put this matter aside for now. Do you have any questions? If not, we can give our opinions." The acceptance team leader brought the topic back and set the tone.
No comments. What comments can you make?
The experts at the meeting discussed a few words and quickly reached an agreement.
"CKJH-62 program-controlled switch, after on-site reports and test demonstrations, the participating experts listened to the research team's report and personally participated in the demonstration test, and then conducted discussions and research with the research team, and finally determined that the CKJH-62 air separation program-controlled switch The switch function meets the requirements of the project, the performance meets the plan requirements, the technical level reaches the international leading level, and fully meets all the goals of the project plan, and is approved for acceptance. ”
This acceptance opinion is not a low praise.
This book was recently updated in ##六@@九@@书@@!! Updated!
Instead of "questioning and answering", "discuss and study" is used. This wording can well reflect the mentality of the acceptance team.
There is no vague wording such as "basically satisfactory" throughout the article, and the technical level is directly rated as "internationally leading". It can be seen that the acceptance team is also willing to go all out.
If you think about it carefully, this is what it should be. The standard of this thing is really leading in the world.
At the end of the meeting, everyone was happy. When many acceptance experts left, they did not forget to emphasize to the leaders of the Postal and Communications Commission that the trial plan was coming out and they must not forget to inform their units.
Several people from the 12th Machinery Department came to chat with Gao Zhendong for a while before leaving. It was rare to meet this comrade from the 17th Machinery Department who was extremely legendary within the 12th Machinery Department. Wouldn't it be a pity not to chat more? .
When they all left, the leader of the Postal and Communications Commission and the chief engineer were not in a hurry to leave. Instead, they asked Gao Zhendong to hold another small meeting. It was just the two of them, Gao Zhendong, the dean of the Institute of Communications, and Mr. Feng.
"Comrade Zhendong, this switch has finally achieved results. What do you think we will do next?" The leader of the Postal and Communications Commission asked Gao Zhendong in person.
Gao Zhendong has really considered this matter.
"Leader, my thinking is this. Air division switches are one of the basic technologies of time division and digital switches. So far, comrades from the Institute of Communications have actually mastered part of the technical foundation of time division/digital switches. At the same time, external technology The environment also has some capabilities that can support time division/digital switches. I am considering whether we can go one step further on the basis of air division switches and develop digital switches, or at least time division switches with digital switching characteristics. "< br>
Gao Zhendong directly skipped time-division switching. In fact, to a certain extent, the difference between time-division switching and digital switching is already very small, and these differences are exactly what Gao Zhendong grasps. Many of them are soft. .
So he thought it would be better to get it right in one step and go straight to the goal of digital switches.
Gao Zhendong's words excited the comrades of the Communications Institute. They had already been drooling at the program-controlled digital switch Gao Zhendong introduced to them at that time. It was so exciting.
Not to mention anything else, just one line can carry many telephone calls, so air division switching, or pure line switching, is used.
What a thrift!
Together with comrades from the Military Communications Institute, they also took the time to study a lot of PCM pulse code modulation that they learned from Gao Zhendong. It can be said that they have a certain technical foundation and the possibility of implementation.
In addition, the Military Communications Institute must have conducted research on this aspect and accumulated certain results. After all, when they studied PCM, it can be said that they were learning ahead of time, but the comrades at the Military Communications Institute really wanted to use it at that time, and they must have already had some knowledge. Results.
Similar ones include A/D and D/A. I think there are results there that can be used.
With these, some of the basic problems of digital exchange have been solved.
However, the Postal and Communications Commission should be more prudent: "Comrade Zhendong, is this step a bit big?"
When I heard that this thing was not a simple thing, it was such a big step. If there were no results for a long time, would it dampen the enthusiasm of the comrades in the Institute of Communications?
Gao Zhendong didn't mind their caution: "In fact, the next step in space separation is time, minutes and numbers, and there is a strong correlation and inheritance between the two, so I don't think it's a big problem if I go for numbers. It doesn’t matter if it takes a little longer, it’s not something that can be sustained even if the air separation exchange has been successful.”
(End of chapter)