Chapter 356 Neighbor

Lin Hong continued the audio for external management, and finally there were only a few dialing sounds left at the beginning, and then he amplified the sound of these dials and displayed them in the audio analysis software.

Looking at Lin Hong constantly processing these dial-up audios, Xu Wenjing and Wang Yuqing also understood.

Xu Wenjing asked, "Stone, do you want to restore the number dialed by the other party through these dial tones?"

Lin Hong nodded: "Well, the dial tone is relatively clear, and there should be no problem."

Wang Yuqing was a little surprised: "You can know what number to dial just by your voice?"

When she heard that the phone dialed, although there were some different sounds, there seemed to be no regularity, right?

Lin Hong took a look at her and saw that her mood had completely regained her senses at this moment, so he explained, "The telephone dial tone is regular. This is a technology called dual-tone and multi-frequency, which was invented by Bell Laboratories in those years. The reason why it is called double-tone multi-frequency is that there are a total of eight frequencies, divided into two groups, and then let them be combined, so that there are a total of old combinations, which can represent different signals in the old.

represents 10 numbers from 0 to 9, as well as these special characters and letters on the keyboard.

With

, Lin Hong also took the phone from the laboratory.

"Although our ears sound similar, there is actually a difference, and we can analyze the difference between them by technical means."

The audio software downloaded by Lin Hong is not specifically used for telephone dial analysis. It can't directly tell what these dial-up audios are, but he can identify these numbers through comparison.

The knowledge about the telephone was taught to Lin Hong by Mitnik in those years. Later, after special practice, he could hear the number dialed by the other party just by his ears.

In fact, many people have this ability, especially those blind people, who are very sensitive to hearing and can distinguish very subtle differences.

In order to avoid trouble, Lin Hong did not intend to tell them that he could directly recognize the numbers, but confirmed the numbers through audio map comparison.

He pressed his phone button, recorded the dial sound, converted it into an audio file, and then used audio analysis software to determine the corresponding maps of these ten numbers, and then compared them with the previous audio dialing map.

Lin Hong's operation was very fast. Later, he did not explain anything to Xu Wenjing and Wang Yuqing, which also involved some technical processing.

Xu Wenjing and Wang Yuqing stood behind him, only feeling that the data on the monitor was flashing one after another, and they couldn't understand it at all.

The two of them looked at each other and were very shocked by the technology shown by Lin Hong.

"These technologies are not something that ordinary students can master..."

Wang Yuqing couldn't help but have a great interest in Lin Hong.

In fact, she had noticed before that Lin Hong's name had been changed to Lin Jiang for some reason. At the beginning, she investigated Lin Jiang's information and found that there was no record showing that the other party had called Lin Hong, and there was no fw in her childhood experience.

At that time, he felt strange and felt that there must be some kind of secret that could not be told. If it hadn't been for Lin Hong's good friend of her good sister Xu Wenjing, she would have continued to pursue it.

Now, she finds that there seem to be a lot of mysteries in this boy. The more he contacted him, the more he found that there were many things that could not be explained by the other party. His life was not like a freshman who had just entered college.

"There must be some unspeakable secret in him... No, I have to find out. Jingjing doesn't seem to know anything and is still in the dark..."

As Xu Wenjing's good sister, she naturally knew that Xu Wenjing had fallen in love with Lin Hong and chose to believe everything the man said without reservation. Wang Yuqing felt that it was necessary to conduct a thorough investigation of Lin Hong.

Just as she was thinking about it, Lin Hong had restored a lot of the phone number of the restaurant.

Lin Hong took out a piece of paper, wrote down the number and said, "It's basically almost done. Six of them can be 100% sure, and I analyzed the other two. There are three possibilities respectively."

So far, the number of the restaurant can be basically determined. Lin Hong does not intend to carry out technical processing. It is more efficient to use stupid methods at this time.

"In this way, there are only nine combinations in total. As long as we type according to these nine numbers, we can determine which restaurant the other party is."

Hearing Lin Hong's words, Xu Wenjing and Wang Yuqing also knew that the next thing would be simple.

Wang Yuqing said, "It's not too late. Call quickly to confirm the final number. After getting the number, I asked my colleague to call out the most recent call record of that number, and then combined with the time when Uncle Dong was kidnapped, I can determine the location of the other party.

Lin Hong didn't say anything. He just picked up the phone and began to dial according to these nine numbers. The first sentence after dialing was: "Hello, I want to order food."

Of these nine numbers, seven of them have two numbers that do not exist, and of these seven, only one number is the service number of the restaurant.

In this way, at this time, the number is finally determined.

After Wang Yuqing got the number, she wanted to call the bureau, but was stopped by Lin Hong: "How do you plan to report this to the bureau? My suggestion is not to disclose this matter for the time being, because we can't rule out whether the kidnappers have an eyeliner in the police station.

Wang Yuqing is no longer as reckless as before at this time. She thought for a moment and said, "If you want to go to the police in the bureau, you can't do it without a formal case. Unless..."

Speaking of this, she turned her head and took a look at Xu Wenjing and continued, "Jingjing, if you can come forward, I think this matter can be solved better."

Xu Wenjing was slightly stunned for a moment, and then understood Wang Yuqing's meaning.

Xu Wenjing is not just a reporter from a TV station. More importantly, her Hehe family background. If she can come forward, it will be much easier.

In a hurry, Xu Wenjing also made a decision: "Oced, then I'll call your director directly. As long as it works well, it will also be a win-win situation."

Next, there was nothing to do with Lin Hong. Xu Wenjing and Wang Yuqing worked together and began to plan this matter.

This matter is more urgent. Xu Wenjing and Wang Yuqing drove away, while Lin Hong stayed directly in his laboratory. At this point, he didn't have to participate in it anymore. The rescue of the hostages was handed over to the police.

Lin Hong sat in front of the computer and began to continue to write the U expansion kernel.

Now, the kernel of the old version 1 has been deleted. He is writing some system services and file systems in the outer layer. As long as the basic components are completed, the system can basically be installed on a simple machine for testing.

After writing for a while, Lin Hong's mind always couldn't settle down and always thought about what had just happened.

"When did you become such gossipy?" Lin Hong laughed at himself, then exited the code editor, pulled out the bit messenger proxy service, and began to invade the China Telecom database server.

[Zhong] China Telecom owns the detailed information and phone numbers of almost all users in the country. Lin Hong visited it when he investigated the details of others before, so this time he is also familiar with it.

He quickly found the call record and location of the restaurant.

"What? "

Lin Hong found that the restaurant called "Bashu Family" was actually in this outer block, only more than ten minutes' walk from the quadrangle courtyard.

"Is it near here?"

The reason why Lin Hong is a little surprised is that usually people who order meals will subconsciously follow the principle of proximity. After all, if it is too far away, the restaurant may deliver food.

It can also be concluded from the behavior of the other party calling to order food. The other party is not an experienced kidnapper.

So, the place where the kidnappers are hiding is also likely to be nearby.

Lin Hong directly called out the recent call record of the restaurant, downloaded it locally, then wrote a regular expression to filter, filtered out the results that were not within the time frame, then filtered out the mobile phone number, and finally determined 14 call records.

Maybe because it is the service phone of the restaurant, there are more people calling when it comes to dinner. If it is an ordinary phone call, there are not so many records at all.

Lin Hong thought for a moment, and finally set a filter condition for the call time.

The call time between the other party and the restaurant is not long. It should be within ten seconds. With this filter condition, the number of 14 call records will be reduced to five at once.

Lin Hong used these five phone numbers to query in the telecommunications database to check the nature of the place where the phone was installed. Finally, he determined the final goal... A private house in the "Cheqian Lane" next door.

This alley is relatively old, and the houses inside are also very dilapidated. I heard that they have been shouting for demolition, but because of the protection of cultural relics and other reasons, the project has not been carried out.

The reason why Lin Hong knew so well was that the last time he came back by car, the van driver told him that he was one of the landlords in it. Because the houses in the lane in front of the car are relatively dilapidated, locals rarely live there. They are rented to others, and most of them are short-term leased.

The lane in front of the car is next door, less than 50 meters away from the quadrangle courtyard rented by Lin Hong. Basically, you can get over the wall of the quadrangle courtyard.

Lin Hong didn't expect that these robbers and himself would become neighbors.

Would you like to have a look?