Chapter 818: What technologies are still missing?
For Gao Zhendong, with the space-division switch, time division and even digitalization are no longer such urgent goals, because the space-division switch is also sufficient to build an automatic telephone switching network, which can affect both quantity and quality, but at least it can be there.

But no matter how urgent it is, if you know there is such a direction but don’t pursue it, you are a fool. Obviously, Gao Zhendong doesn’t want to be this fool.

“Well, Comrade Zhendong, since you are so confident, then there is no problem. Our Postal and Communications Commission will listen to you in this regard! We will follow up on whatever you decide on the next step.” The leader of the Postal and Communications Commission is also a very decisive person.

“Chief Engineer Gao, if you want to realize your idea, what basic technologies do you need to develop? We will fully support you.” The chief engineer of the Postal and Communications Commission considered the problem more from a technical perspective. Since he wanted to do it, he would develop the pre-conditioning technology first.

“In fact, many of them have already been available before, but there is one thing that must be done, otherwise we can’t even figure out the hours and minutes, let alone the numbers.” Theoretically, purely digital things don’t necessarily have to have hours and minutes, but in reality, with the current hardware capabilities, Gao Zhendong is not going to make any trouble and honestly follows the technical information at hand, directly entering the numbers from the hours and minutes.

The main reason is that the stuff in hand came from time to time, and the technology inheritance and path dependence are very strong. Gao Zhendong has no idea of ​​starting from scratch, so as to avoid a chain reaction that would cause many existing technologies to become unusable, which would be nonsense, such as packet switching, signaling No. 7, etc.

“What is it? We fully support you. We will give you whatever you want.” The leader of the Postal and Communications Commission made the decision directly without waiting for Gao Zhendong to say what it was.

I want a 5 Gigabit Ethernet fiber switch, I want 7G, I want Wifi…

However, Gao Zhendong also knew that this was nonsense. This unreliable idea flashed through his mind and disappeared immediately.

“Solid-state electronic switch! Without it, with the switching speed of the relay, you can break yourself and still can’t keep up.” For the Military Communications Institute, their main demand is to digitize voice, so pulse code modulation PCM, AD, and DA are all needed. They are also working on these things under the guidance of Gao Zhendong, but because they don’t have the need for time classification, they didn’t develop electronic switches.

Gao Zhendong gave a general introduction to solid-state electronic switches. Relays can only be regarded as electromechanical switches, which are the result of the joint efforts of electronics and mechanics. Solid-state electronic switches have no moving parts. For this reason, in some applications, relays are far superior. There is no mechanical fatigue and failure, and the switching speed is extremely fast.

“Electronic switch? Is this possible?” The chief engineer of the Post and Telecommunications Commission knew that in theory, a triode could be used to make an electronic switch, but the electronic switch Gao Zhendong was talking about must not be something so simple. The triode is unidirectional, and the electronic switch used in the switchboard should be bidirectional like a relay.

This is a bit more troublesome to do. In addition, considering the characteristic requirements such as efficiency, voltage drop, on-resistance, etc., a simple transistor construction may not be able to meet the requirements of the switch.

“Yes, I can do it. Now I have some basic knowledge.” Gao Zhendong said with a smile.

There are many kinds of electronic switches, including magnetic, electric, semiconductor, and vacuum tube types. The PMOS technology he has now may not be able to withstand the test, but no one stipulates that these integrated circuit production equipment that use PMOS can only use PMOS.

Even what he thought was more than just a solid-state switch.

“Well, Chief Engineer Gao, you have the final say on this matter. Our comrades from the Institute of Communications will come to you to implement this matter later. The work may be done more by the 12th Ministry of Machine Building, but we can still solve the funding problem.” The leaders of the Postal and Communications Commission were also very generous. They knew that this matter could only be done by the 12th Ministry of Machine Building, but they would not just “wait and rely on others” for everything, but would take the initiative.

“Well, okay. In terms of hardware, this is the only thing that is still missing. As for the remaining technologies, apart from electronics, a considerable part of the work is in the rules and software. If the comrades in the Institute of Communications are interested in this, they can consider strengthening this aspect.”

“It’s easy, it’s easy. It’s graduation season now. Our subordinate colleges and universities also have a group of graduates in this field who can be used. We will arrange this matter.” The chief engineer of the Postal and Communications Commission laughed. In this regard, except for the 12th Ministry of Machine Building, no other ministry can compare with them.

There are numerous communication-related colleges under the Postal and Communications Commission. There is a college named “Post” in Beijing, Nandu, Southwest, Northwest, and Northeast. In Gao Zhendong’s previous life, many of them were popular schools, and their admission scores could be raised by half a grade or even a whole grade.

These colleges are naturally close to computers and software, and they offer a full range of related majors.

Gao Zhendong was also very clear about this situation. He was not worried that the Postal and Communications Commission would not be able to handle this. “Okay, I will talk to the comrades from the Communication Institute later to resolve these issues. For now, you should focus on the work of space-separated program-controlled switching. I guess you will be busy in the near future.”

He had just heard from the leader of the Postal and Communications Commission about the ins and outs of this acceptance meeting. Unlike the Ministry of Foreign Trade and the Postal and Communications Commission, which only wanted to demonstrate their strength and did not have much hope for sales, he felt that at least some of this stuff could be sold. Putting aside other things, even if the Russians didn’t use it, why not buy some to study it?
Gao Zhendong didn’t believe it.

Moreover, among the countries in the Economic Aid Association, there are some distinctive countries with good economic conditions, and they may not be uninterested in this thing.

So when Gao Zhendong said they would be very busy recently, that’s what he meant.

Gao Zhendong left the Postal and Communications Commission and saw that it was almost time for dinner. He got in the car and said to the driver, “Let’s go to my father-in-law’s house.” He had work to do and his wife to take care of.

The driver has been working with Gao Zhendong for a long time and is very familiar with the places he often visits. In fact, he knew these places as early as when he took on this job, and at that time he didn’t need Gao Zhendong to show him the way.

The GAZ-69 quickly dropped Gao Zhendong off at the door of Lou’s house before leaving. As for returning to the Siheyuan, he didn’t have to wait. It was still unclear whether Gao Zhendong would return to the Siheyuan today.

As soon as she entered the Lou family’s house, Lou Xiao’e, who was leaning on the sofa reading a book, saw Gao Zhendong. She happily threw the book aside and patted the seat next to her: “Zhendong, come and sit here, come and sit here.”

Gao Zhendong walked over and casually said with concern: “In your situation, you should stop reading so many books for the time being. It’s harmful to your eyes.” There are some changes in vision during pregnancy. If you are unlucky, reading will be very difficult.

“It’s okay, it’s okay. I don’t read professional books or biographies or anything like that. They don’t require much brainpower.” Lou Xiao’e hugged Gao Zhendong’s neck, looking cute and innocent.

“I’m not talking about the brain, but the eyes!” Gao Zhendong tapped her nose and glanced at her. He saw the words “Pasteur” or something like that. It seemed to be a biography of a medical figure, really just to kill time.

“Oh, my eyes are fine.” It seems that Lou Xiao’e is more worried about her brain and is very confident about her eyes.

“How are things going with Doctor Luo?” Although the project had just started, Doctor Luo, as one of the top experts in this field, had already accumulated a batch of relevant data. As soon as the project started, Lou Xiao’e, the member responsible for data analysis and processing, had work to do.

The analysis and processing of past historical data can help find the right direction for the next research work, which is still very important.

Speaking of this, Lou Xiaoe was very proud: “Well, with the database you installed for me, I can do it pretty quickly.”

There was no data analysis software like SAS, SPSS, and Stata at the time, so Gao Zhendong set up a database for her to use first. It turned out that Lou Xiao’e learned this stuff quite quickly, and at least some simple statistical analysis was not difficult for her.

As for the computer installed with the database software, the Lou family bought it themselves with Gao Zhendong’s approval.

“Teacher Luo said that the speed of data processing this time was beyond her expectations and saved her a lot of time.” When Lou Xiao’e said this, she wrinkled her nose proudly, and Gao Zhendong laughed when he saw it.

“That’s good. By the way, Shazhu and Sister Qin are getting married soon, will you go then?” Gao Zhendong estimated that Lou Xiao’e would definitely join in on the fun, unless her health did not allow it.

Sure enough, upon hearing this, Lou Xiaoe’s eyes lit up. She had a good relationship with Qin Huairu, and Gao Zhendong had a good relationship with Sha Zhu. In her opinion, it would make no sense not to go.

“Really? I didn’t know about this during the time I lived here. Go! You must go!” When she said this, she laughed.

With her six or seven-month-old belly, even though she was carrying twins and her pregnancy was very obvious, which was a little inconvenient, she was still basically able to move around. After all, it was a wedding, so how could she not take part in the joyous occasion?

“Okay then. I’ll pick you up then.” Gao Zhendong didn’t care about it. Being careful and being confined to house are two different things. Proper exercise plus a happy mood are good for Lou Xiao’e. This is probably the scientific reason behind the traditional custom of sharing in the good fortune.

“Yeah. Come on, tell me what’s going on.” Lou Xiao’e’s curiosity was out of control.

She knew about the affair between He and Qin, but she was not very clear about it because she went back to her parents’ home to take care of her pregnancy before getting married. Now when Gao Zhendong mentioned it, she was so curious that she couldn’t suppress it.

“This is a long story… ” Seeing that his wife was curious, Gao Zhendong acted like a storyteller and told Lou Xiaoe about this matter, which made Lou Xiaoe giggle.

(End of this chapter)