Early the next morning, Mu Donglai's father and daughter packed their luggage and went to Xiangjiang, this time they went to Xiangjiang, in addition to being invited by Mu Qingqing's second uncle to take a look at the environment of Xiangjiang University, they would also help Pang Xuelin apply for a global patent for CVD.

Although China has joined the PCT Patent Cooperation Organization, compared with the PCT process in China, the Xiangjiang side is much stronger in terms of speed and standardization.

As for Liu Fatzi, a series of processes such as company registration and formation began.

At nine o'clock in the morning, Pang Xuelin arrived at the headquarters of Huawei on time.

Ren Zhengfei and several Warwick executives have been waiting for a long time.

In addition to Xu Wenwei, who I had seen before, there was also a man and a woman, who were the other two generals under Ren Zhengfei, Zheng Baoyong and Sun Yafang.

Zheng Baoyong is the leader of the early R&D department of Warwick, since 1989, he has been engaged in the research and development of communication products, responsible for the overall design of a number of program-controlled switching equipment, and has completed the research and development of HjD48, jk1000 air division program-controlled switch, C&C08 2,000 door operator and later C&C0800000 door machine.

As for Sun Yafang, it is needless to say.

This is also one of the key figures in the rise of Warwick, and Warwick later attacked overseas markets, all relying on the team led by Sun Yafang to develop step by step.

Within Warwick, Sun Yafang's status is under one person, above 10,000 people, although the company still has several executive vice presidents, but the actual power is under Sun, this is not only a ranking problem, but also a problem that needs to be reported to her directly or indirectly, it can be said that the decision-making level in Huawei's decision-making level is two people: Ren Zhengfei and Sun Yafang.

There are some personnel appointments and important documents that can basically be passed as long as Sun Yafang reads and agrees; In Warwick's company-level documents, there are only two people in the copy column who are referred to as Mr. Ren and Mr. Sun, and the names of other vice presidents must appear; The documents of the marketing and human resources departments in her direct charge were copied to Sun Yafang alone; Other vice presidents all call Sun Yafang Mr. Sun, and even Ren Zhengfei is Mr. Sun's chief and Mr. Sun's shortness in public.

But now, Sun Yafang is only the head of Warwick's marketing department, and Ren Zhengfei can bring her over to meet Pang Xuelin, which to some extent has shown that Ren Zhengfei attaches great importance to her.

"Mr. Pang, this is Zheng Baoyong, the chief engineer of our company, and this is Sun Yafang, the manager of the marketing department!"

"Mr. Zheng, Mr. Sun, hello!"

Pang Xuelin shook hands with Zheng Baoyong and Sun Yafang respectively.

"Mr. Pang, hello!"

Zheng Baoyong and Sun Yafang looked at Pang Xuelin with scrutiny, although they had long known from Ren Zhengfei and Xu Wenwei that Pang Xuelin was not ordinary, but they couldn't imagine how Pang Xuelin was unusual.

Ren Zhengfei said with a smile: "Mr. Pang, everyone is waiting in the conference room, so let's start." ”

"Okay!"

Pang Xuelin smiled and nodded.

Although he talked to Xu Wenwei about the design plan of 2,000 doors and 10,000 doors program-controlled switches two days ago, he only provided a general idea, and the specific technical details have not had time to talk.

At today's meeting, Ren Zhengfei summoned all the engineers of the Huawei R&D department, and Pang Xuelin explained the design ideas of the program-controlled switch to everyone.

Pang Xuelin and Ren Zhengfei entered the conference room side by side, and found that the conference room was already crowded with Warwick engineers.

Xu Wenwei, Zheng Baoyong, and Sun Yafang found the three remaining vacant seats to sit down, while Ren Zhengfei accompanied Pang Xuelin to the top of the conference room.

Ren Zhengfei looked down and said with a smile: "Everyone is here, then let's start now, this is Mr. Pang Xuelin, the R&D consultant who has been spreading within our company in the past two days, and then Pang Xuelin will explain to you some technical ideas and ideas in the research and development process of program-controlled switches......"

As he spoke, Ren Zhengfei took the lead in applauding, and then a sparse voice sounded in the conference room.

Most people, like Zheng Baoyong and Sun Yafang, looked at Pang Xuelin with scrutinizing eyes.

Although there are many rumors about this young man, it is said that it took him two hours to conquer the boss and XCMG with technical means.

But when they saw Pang Xuelin, almost everyone had questions.

Such a young man who looks like a high school student, is he really as godly as Xu Wenwei said?

In particular, a young man in his early twenties sitting at the bottom of the conference room was even more unconvinced.

As a young man who grew up in the praise of others, Li Yinan has always been proud of himself.

At the age of fifteen, he was admitted to the juvenile class of Huazhong University of Science and Technology, and even among the juvenile classmates, he was considered an outstanding existence.

After graduating from his bachelor's degree, he stayed on for graduate school and just got his master's degree.

In fact, he has been interning at Warwick since last year, and has been highly praised by Zheng Baoyong and Xu Wenwei.

Just a few days ago, he went back to school to defend his thesis, completed the graduation procedures by the way, and waited to return to the company to show his strength.

Who would have thought that as soon as he came back yesterday, he heard that a genius boy came to the company and was hired by the boss as the company's R&D consultant.

His own level is already quite good within Warwick, no matter how talented he is, can he reach his own level?

Li Yinan was a little unconvinced.

Pang Xuelin had a full view of everyone's eyes, this kind of small scene was nothing to him at all, he smiled and said, "Okay, then let's get straight to the point." ”

"Today, we start with the design of 2,000 program-controlled switches. I said to Mr. Xu before that the 2,000-door program-controlled switch is mainly composed of three parts: the central processing module, the communication control module, and the central switching network. ”

"The central processing module module includes a secondary power board (PWS), an alarm processing board (ALM), a main processing board (AMP), a central database board (CDP), a bus control board (BCP), and a built-in service processing board (ISP). The CDR storage board is also located in the central processing module frame. The hardware of the main processing board, the central database board and the bus control board are all CPC boards, and the functions of the main control, central database and bus migration are completed by loading the corresponding host software, and they all work in the master/standby mode. Among them, the main processing board and the bus control board are fixed as one pair, and the central database board and the built-in service processing board are configured according to the actual situation, wherein the central database board is configured with at least one pair, up to seven pairs, and the built-in business processing board can be configured with up to six pairs. ”

"The main processing board is the hub of the whole system, responsible for the status management and front-end communication of each board in AM/CM (including SPM and SRM), and the AMP and BAM are directly connected through the 10M/100M Ethernet port. The functions of the CDP board include user line hunting, trunk line selection, ITC channel management, ECP channel management, and management of various public resources in the SRM box. The BCP board is responsible for the communication between the boards in the CPM box. The ISP board completes the functions of special number conversion, caller ID screening, and password billing. The ALM board is responsible for serial port communication and manages the status of the PWS board and fan enclosure. The SUB board is a CDR storage board, and the CDR generated by the SPM module is backed up on the SUB board at the same time when it is sent to BAM. When BAM fails, the SUB board can replace BAM to complete the CDR storage function. The SUB board realizes the safe storage and backup of CDRs and improves the reliability of the system......"

While explaining, Pang Xuelin used a marker pen to depict the design scheme of the entire central processing module on the whiteboard behind him in the form of a module diagram.

Below the conference room, there was the rustling of excerpts and the chatter of the engineers.

"This plan feels so much better than the one we had before."

"I don't think there's anything wrong with the hardware."

"And compared with our previous solution, there is one more SUB board, and there is such a secure storage and backup function, and the redundancy of the system is greatly increased."

"It depends on how the control software is designed, if the software is well designed, then the feasibility of this scheme is high......

The engineers in the audience were talking.

Ren Zhengfei turned his head sideways and smiled at Zheng Bao beside him: "Old Zheng, what do you think?" ”

Zheng Bao's eyes sparkled and said, "This plan is very good, this young man, there is something!" ”

On the other side, Li Yinan looked thoughtfully at the text on the whiteboard.

He had to admit that the young man on the stage still had something.

Pang Xuelin didn't care about the reaction below, but continued his explanation.

"Next, let's talk about the communication control module (CCM), the communication control module is the core of the communication between modules, and there are two independent frame switching network planes, called the 0 plane and the 1 plane. Each plane consists of a BA plate, and the two planes share a mother plate. Each CCM plane can provide 56 HWs of 2.048Mbit/s, with a total HDLC switching rate of 112Mbit/s, and the rate of each channel is 64kbit/s~2.048Mbit/s. ”

"The CCM module includes a secondary power board PWS, a frame switched network board (FSN), a bus management control board, and a BA board that can be flexibly configured according to the number of interface boxes and service processing boxes, with at least two pieces. FSN is used to implement HDLC signaling link switching for multiple HDLC channels, and can provide up to 16 lines of 2MHW. The BAC board is responsible for channel configuration and bus arbitration of the frame switching network of the communication control module, and monitors the working status of each board in the communication control module. The BAC board also has a frame switching function and can provide eight 2MHW strips, i.e. with the function of half an FSN board. ”

……

"Finally, let's talk about the central switching network, which is a full-utilization network. The maximum capacity is 128k×128k. The actual installed capacity can be superimposed in units of 16k××16k~128k×128k, and can be smoothly expanded under the capacity of 128k×128k. The central network is composed of 16 8k single-T network units, and every two 8K single-T network units are placed on a single board, which is called the central network unit board (U-board) to complete the central switching of the 128K network, that is, to complete the second-level switching of the service switching network. The edge network is composed of 64 4k single-T network units, and every eight 4K single-T network units are placed on a single board, which is called the edge network unit board (SNU board), which completes the edge-level switching of the 128k network, of which four constitute a first-level switching network and the other four constitute a three-level switching network. ”

"As for the specific structure of the central switching network, the central switching network frame occupies the position of the two standard chassis, and the large motherboard structure. The NCC (Network Communication Control) board is the control board of the entire ET, which completes the functions of time slot allocation, networking operation and communication with other modules. The BDR is a bus driver board that provides a control bus for the NU and SNU boards. PWS is a high-power power board that can provide a power output of 300W/5V. All other boards work in active/standby mode. The U-board must be fully configured, otherwise there will be blocking. The SNU board is set according to the capacity, which can be appropriately reduced ......"

For a whole morning, Pang Xuelin was explaining hardware design.

From the overall structure of the program-controlled switch, to the location of the chassis, the setting of the circuit board, and various redundant designs that have been considered and not considered, they have all been listed by Pang Xuelin.

By this time, the Warwick engineers in the audience had long since lost their doubts in their eyes.

Even Li Yinan, who was not convinced, honestly copied Pang Xuelin's design plan like a primary school student.

"Mr. Ren, where did you pick up such a big baby?"

Zheng Baoyong couldn't help but sigh.

When Ren Zhengfei spent such a big price to hire this young man before, Zheng Baoyong still had some doubts.

After all, now that Warwick's cash flow is so tight, another million cash will be allocated to this young man, and there will not be much left for the research and development funds of the program-controlled switch.

But in the morning, Pang Xuelin's performance completely dispelled Zheng Baoyong's doubts.

As an experienced engineer, Zheng Baoyong is very aware of the technical difficulties of program-controlled switches.

With the current industrial level in China, it is very difficult to design a qualified program-controlled switch.

The plan given by Pang Xuelin has exquisite structure, detailed details, and a very high degree of maturity, and even has many unique features compared with the products of leading foreign communication equipment manufacturers.

Ren Zhengfei showed a satisfied smile on his face, there is no doubt that in the morning, Pang Xuelin's performance has completely eliminated the doubts in everyone's hearts.

After explaining the design scheme of the program-controlled switch, Pang Xuelin said with a smile: "Do you have any questions? ”

Everyone in the audience looked at each other, and everyone was not stupid, and no one in the entire Huawei company could do this kind of design plan.

It will take a while for everyone to fully digest and understand, let alone ask questions.

For a moment, the conference room couldn't help but be quiet.

At this time, Li Yinan slowly raised his hand: "Mr. Pang, I am Li Yinan from the R&D department, I want to ask when the design plan of the software system will be explained?" ”

Pang Xuelin couldn't help but be stunned, but he didn't expect that the tall and thin boy with a fair face in front of him was Li Yinan.

He thought for a while and said, "In the afternoon, this afternoon, I will share with you the relevant algorithms of the 2,000-door program-controlled switch." ”

"Then I'm fine."

Li Yinan sat down.

"Okay, it's almost time, let's go eat first, let's come over and talk after eating."