Ambrera's press conference was a unique one, unlike in the past, when reporters and guests arrived, they were all in the same hall, and then the host came to the stage to announce the company's new products.

This time, because of the need to show the PHS wireless local call technology to the world, it was not possible to use the traditional press conference method, so after the corporate representatives of the journalists, telecommunications operators, and dignitaries from various countries came, the employees of Ambrera registered everyone and took out a brochure and a small box and handed it to them.

Everyone was very puzzled, opened the brochure and looked, the introduction is about PHS system information, although everyone has done a lot of homework about PHS before coming, but Ambrera is too strict about HPS, these people's understanding of PHS only stays on paper, but this manual is a comprehensive introduction to PHS, so that everyone has a more intuitive understanding of the new PHS system.

After reading the brochure, everyone is looking forward to this system even more.

"Damn, the publicity is so good, I really want to see this so-called PHS mobile phone right away." A reporter said after reading the brochure.

Others also nodded, including many high-ranking officials and dignitaries from various countries, and even the Chinese ambassador to Canada, Wang Guozhong (apocryphal), also came, expressing to Ambrera's staff that they hoped to see the so-called PHS mobile phone immediately.

Ling Shizhe was handing out manuals to everyone with the staff, and said with a smile: "Do you see the small box in your hand?" That's PHS's mobile phone, including your phone number. ”

"What!! What's in the box is a PHS phone? "Everyone was stunned.

"Hey! Buddy! I know you, you are Ling, you are the founder of Ambrera Corporation. A reporter recognized Ling Shizhe.

Ling Shizhe was immediately surrounded by people.

A middle-aged man in a suit and leather shoes in his forties squeezed in front of Ling Shizhe and introduced himself: "Hello Mr. Ling, I am Canada's Minister of Communications George . Yorkson. Just now you said that the box is a PHS mobile phone, right? ”

Ling Shizhe smiled, "Yes, that's right, you can open it now," he looked at his watch. "It's 9:20, 10 o'clock. You'll be able to use it to make calls. ”

George. Joksen opened the box, and a small, black straight phone appeared in his eyes.

"Wow! Actually...... It's so small? After everyone opened the box in their hands, they were all stunned to see a mobile phone lying inside.

Soon everyone questioned, "Is it really reliable for its communication capabilities to be so small?" ”

Facing everyone's questions, Ling Shizhe smiled and said to everyone: "Whether it will be successful or not, you won't know after 10 o'clock." ”

Everyone stopped talking. With a skeptical attitude, he continued to rummage through the contents of the box.

There is a manual inside, and according to the manual, we found that in addition to the PHS mobile phone, there is also a SIM card in the box, which has a string of numbers on it, which is the phone number of the mobile phone; In addition to this, there are headphones and power cords, as well as a polymer lithium iron phosphate battery with a capacity of six hundred and fifty milliamps.

Thanks to the use of digital power management technology, the standby time of the entire PHS has reached 5 days.

Follow the instructions. Everyone quickly put up the mobile phone group.

As soon as the phone was turned on, the screen flashed, and then a pleasant ringtone came. It's on the boot screen......

Soon everyone found out that this mobile phone is actually a blue screen, and the screen is not small, it is actually 2.4 inches. The display shows the current date, time, battery and signal status.

Since the signal has not yet been turned on, the screen displays the words "The signal cannot be connected".

At this time, Ling Shizhe's voice came into everyone's ears, "PHS uses the company's latest 2.4-inch SNT blue screen LCD, which is a color filter added to the traditional monochrome LCD display, and we add a blue light source, so the entire mobile phone screen is blue." The mobile phone has added a button indicator function. I can use it as usual at night when I can't see my fingers. "It's beautiful!" A female reporter said, looking at her phone.

"It's nighttime. It will be prettier. Ling Shizhe replied with a smile.

"Did you give this phone to us?" The female reporter asked again, it seems that she has completely fallen in love with this PHS mobile phone.

"Nope. This is just a test product, not a product yet, but I will give it to you for a day to try, and after midnight tonight, we will take it back. Ling Shizhe said.

"Why take it back, we can pay for it!" Hearing that the mobile phone was going to be taken back, everyone was immediately unhappy.

"Quiet! Be quiet! Ling Shizhe waved his hand to quiet everyone down, "It's not that I don't want to give it to you, but you can't use it if you take it, because the program-controlled switch of the telecom operator has not yet installed our wireless base station and combined communication module, even if it is given to you, you can't use it." And the phone number on the mobile phone is also temporary, after 0:00, the number will be eliminated, and this number is the local number of Raccoon Town, you can't use it if you take it back, even if you get through, it's also calculated as an international call. ”

After hearing Ling Shizhe say this, everyone reluctantly died, and then they eagerly asked, "When will it be listed." ”

"It depends on the results of this experiment, if the results are good, I think the telecom operator will contact us soon, and as for when your country will open PHS service, you have to ask the local telecom company." Ling Shizhe replied.

"Is the PHS technology being announced?" A representative of an apparently telecommunications equipment manufacturer asked, knowing Ambrera's tradition that when a new product is invented, it is generally open to technology, which is why he asked.

"Let's talk about it after the test is passed, don't you think it's too early to talk about this now?" Ling Shizhe said lightly.

Everyone understands that once the test is successfully passed, Ambrera will definitely open up the technology, but this openness is conditional, and if the telecommunications equipment manufacturer cannot open satisfactory conditions. Ambrera will not give them this technology, and as for what price to get PHS, everything will have to wait for the results of this experiment.

After the success of PHS technology. Ambrera immediately applied to the Canadian Department of Communications for a PHS trial, and it took only a week. A test base station was set up covering the entire Raccoon Town and the southern part of Montreal.

Although it may sound like a very large project to set up an experimental station, as if you have to start all over again with the foundation of a house or something, it is actually very simple to set up - find a few empty plots of land, put in the new program-controlled switch that Ambrera has brought over, and then set up a few big hardcore signal relay towers, and that's it!

Historically, the coverage area of PHS signal base stations was very small, only 200-300 meters. Ling Shizhe designed this set of signal base stations to use the wireless base station technology of later generations, so that the signal coverage of the base station reached 15 kilometers.

In fact, this set of base stations is not unusual at all, it is the famous Thtra digital time division multiple access base station in later generations, is a kind of pan-European trunking radio, is a new digital trunking mobile communication system commonly used in the world, and is one of the digital trunking communication standards adopted by Canada in later generations.

Ambrera uses this set of THTRA digital trunking communication base station technology from the later Motorola company, this base station uses a base station to connect with a telephone line, and the program-controlled exchange room of the telecom operating company is used as a base station, and then other peripheral base stations are connected through the telephone line, and each sub-base station is also connected with a telephone line. So as to achieve the best communication signal, the most communication tracks, the longest communication radiation range, and the best voice communication quality.

The principle of this system may seem complicated, but it is not difficult to understand at all.

Let's take an analogy. PHS systems have historically used small cell communication technology, so the coverage of the base station is small. This makes PHS more suitable for urban use, and less effective in the wild.

If it is in a densely populated country, this is not a disadvantage, it is a big deal to build more base stations, but in Canada or North America, which is vast and sparsely populated, this disadvantage can be fatal, the city is fine, but once people go to the suburbs or farms far from the city. There's no way to use PHS.

Because both Canada and the United States have large farms, the villagers are scattered. Driving dozens or hundreds of kilometers will not necessarily run into people, and a mobile communication cellular network covering the entire rural area will be established. It's a deal that will lose all the pants, and the telecom operators in the United States are privately owned, so no one would do it with a fever, which is why PHS has historically been unpopular with European and American telecom operators.

However, the U.S. government also stipulates that every citizen in the United States must enjoy the convenience brought by wireless communication technology at home, which lays the foundation for high-power long-distance wireless communication base station technology.

The first is Motorola, the Iridium project he proposed is the earliest long-range wireless communication system, people living in remote areas through Iridium satellite phones to contact distant relatives, but unfortunately the cost of using this system is too high, and soon Motorola filed for bankruptcy for the Iridium system.

Later, Qualcomm of the United States put forward a plan for ultra-high-power long-signal communication base stations, because the electromagnetic radiation is too high, people have been under this electromagnetic radiation for a long time, and the incidence of cancer and brain tumors is dozens or even hundreds of times that of the usual, so this system has not been made, and it was shot by the United States.

Later, Olson, the founder of DEC company, proposed WiFi wireless communication technology, but this technology only solved the problem of wireless Internet access, and low-cost long-distance communication was still not solved.

Therefore, after thinking about it, people thought of combining telephone lines with base stations to communicate and establish base station clusters to solve low-cost long-distance communication, which is the THTRA digital trunking communication base station technology commonly used in Europe and the United States in later generations.

Thtra works by setting up one or several Thtra base stations next to the main house on each farm and connecting them to the fiber optic or fixed telephone lines laid on the farm.

If A lives on a farm on the West Coast and wants to make a wireless call with his family B who lives in New York on the East Coast, then as long as the signal coverage of the base station is within the coverage of the base station, you only need to use your mobile phone to dial the phone number or mobile phone number of the family living on the East Coast, and the signal is transmitted from the mobile phone to the base station, and the base station transmits the signal to New York on the East Coast through the telephone line or network cable connected to it, and finally through the local wireless base station, you can achieve long-distance calling.

The mode is as follows: mobile phone transmits wireless signal -- sub-base station -- transmission through telephone line (network cable) -- city central base station on the west coast -- telephone line (network line) intercontinental transmission -- New York city central base station -- sub-base station -- B mobile phone.

It is through this transmission mode that the base station is combined with the telephone line or network line, so as to realize the long-distance wireless signal transmission, and the base station cluster is adopted to maximize the coverage of the signal.

Thtra technology is the best is Motorola, how good is his base station technology? For example, if only one THTRA base station is built in a place, the radiation range is at most 20 kilometers, but if you build a communication cluster and use it with the host station, the wireless signal coverage can reach 200 kilometers away, if it is at sea, the ship presses the shipboard terminal, and the radiation range can enter the ocean 400 kilometers away!

Don't doubt that Motorola's THTEA cluster base station communication technology is so domineering, not only has a wide signal coverage, the voice communication quality is also extremely high, and the electromagnetic radiation is also very low, which is 15% lower than the electromagnetic radiation generated by the signal emitted by the PHS micro cell base station, which is the lowest wireless signal communication base station in the world.

However, THTEA digital time division multiple access base stations also have shortcomings, that is, the base station is larger, Ling Shizhe's THTEA system, due to the limitations of semiconductor technology in this era, the volume is larger, of course, its signal coverage can not be compared with the later generations of Motorola's THTEA, not to mention the technical docking with PHS, so the coverage is reduced by a large part, and its signal coverage can only barely reach 15 kilometers.

(This chapter involves a lot of technical aspects, I don't know if you can understand it?) But it doesn't work if you don't introduce it.,Don't talk about it.,Everyone can't understand that PHS's communication range is obviously very narrow.,How did it get to the novel.,PHS's communication range has become so perverted.,If you don't explain it.,It won't work at all.。 That's why I wrote such a large space. (To be continued)