Go up, you can't go up, retreat, you can't go back.

Qin Feng was helpless.

And, there is no signal.

But don’t worry if you don’t have a signal. There is a satellite phone in the car.

What is a satellite phone? A satellite phone is a phone that transmits information based on a satellite communication system, that is, a satellite relay phone. A satellite relay phone is a product of modern mobile communications. Its main function is to fill in existing communications (wired communications).

, wireless communication) terminals cannot cover areas, providing more sound services for people's work. In modern communications, satellite communications cannot be replaced by other communication methods. All communication functions provided by existing commonly used communications have been

Used in satellite communications.

Since the Soviet Union successfully launched the first artificial earth satellite on October 4, 1957, the human world has been completely opened up.

However, although the satellites at this time could transmit communications, they were unable to conduct satellite communications.

Because it does not have the ability to forward signals in real time. Not only is it unable to make calls, it is also unable to transmit TV signals.

There is no satellite station.

It was not until 1965 that the Soviet Union launched the MOLNIYA synchronous satellite, which completed regional communications and television broadcasting between the Soviet Union and Eastern Europe.

At this time, satellite communication was truly realized.

Of course, this era was limited by the system at the time and the international environment, and satellite communications could only be divided into regions.

The rest won't work.

After all, if a Warsaw Pact and a NATO are in opposition to each other, how can it be possible for your satellite signals to spread wantonly in my area?

Therefore, it was not until the 1990s that the collapse of the former Soviet Union led to the formal establishment of global satellite communications.

As for the advantages and disadvantages, they are quite obvious.

Compared with commonly used cable communications (landline telephones), microwave communications (mobile phones), etc., satellite communications have very obvious advantages and disadvantages.

To put it bluntly, the communication distance is very long. As the saying goes, "Stand high and see far." Geostationary communication satellites can "see" the Earth's maximum span of more than 18,000 kilometers. At any two points within this coverage area

All can communicate through satellites, and microwave communication generally requires a relay station about 50 kilometers away. The coverage distance of a synchronous communication satellite is equivalent to more than 300 microwave relay stations.

At the same time, satellite communication has many communication lines and large capacity. A modern communication satellite can carry several to dozens of transponders, and can provide several channels of television and thousands of channels of communication;

In addition, its communication quality is good and its reliability is high. Satellite communication has few transmission links and is not affected by geographical conditions and weather, so it can obtain high-quality communication signals.

And it is flexible to use and adaptable. It can not only realize communication between any two points on land, but also realize communication between ships and ships, ships and shores, air and land. It can form a multi-directional, multi-point

three-dimensional communication network;

And compared with the cost of service providers, its cost is relatively low. At the same capacity and the same distance, satellite communication consumes less money than other communication equipment, and the cost of the satellite communication system does not follow that of the communication equipment.

The distance increases as the distance increases, and as the design and process mature, the cost is still decreasing;

The shortcomings are also obvious. First of all, although its manufacturing cost is low, its operating cost is not low. Therefore, the communication tariff standard is higher than the commonly used cable communication and microwave communication, which is ten times or even dozens of times the tariff standard.

;

Secondly, if the device itself is covered by objects such as a large building or a mountain, the communication signal will be non-existent or flicker erratically. Of course, this is also a disadvantage of mobile phone communication and an advantage of fixed-line calls.

The real biggest drawback is that there is a delay during the call, resulting in poor connection. Of course, with the advancement of technology, this has also been greatly improved.

However, at this stage, the call quality is still not that high.

Of course, compared to the fact that my mobile phone has no signal at all, the satellite phone has a very good signal.

At least, Qin Feng can ask for help.

Generally speaking, this kind of phone placed in the car is most likely used as an emergency call.

Therefore, one-touch dialing is directly set up above.

Soon, there was a call over there.

"Hello, there is something wrong with my car and it broke down. Can you come to the rescue?" Lin Feng asked.

"Mr. Qin, the exclusive version of the luxury RV provided by our company provides customers with 24-hour uninterrupted service, 365 days a year. In addition, the first year of free breakdown towing service is provided." The voice on the other end of the phone was enthusiastic.

Qin Feng blinked.

Free breakdown towing service for the first year, this is okay.

Originally, Qin Feng was thinking that asking someone to tow the truck this time would probably cost a lot of money.

But I heard that it’s completely free, so that’s great.

Then you're welcome.

"Mr. Qin, where are you?" A pleasant voice came from the other side of the phone, "If you don't know, you can turn on the GPS satellite positioning system so that our company can receive your location signal."

This kind of RV naturally carries a global positioning system, which is also convenient for rescue.

After all, those who can buy this RV are rich people. Their life safety is naturally the most important thing.

But at the same time, their personal privacy is also very critical.

Therefore, in this regard, the company has set up an emergency rescue positioning system and jammer.

Usually block it through physical buttons. That way, no one can find you through this.

And when necessary, when rescue is needed, turn it on. The company will receive the information and come to the rescue.

At the same time, it can also function as an alarm device.

Once it is turned on, it means there is an emergency, and the company will definitely send people to check and rescue.

"Okay, thank you." Qin Feng found the switch and pushed it down.

Soon, the satellite positioning system started working and spread the information about Qin Feng's location.

The company received a call from Qin Feng and naturally paid close attention to it.

Soon, Qin Feng's point was displayed on their company's satellite system.

"Here, how come this has gone so far!" The whole company was confused. "This has gone to Canada, and it's so far away. It looks like it's in the mountains. This, this, the rescue cost will be very expensive.

ah!"

The whole RV company is a little bit numb.

If this breaks down on an ordinary road, it would be fine.

That's no problem. No matter how far it is, just rent a trailer and go to the nearest local place.

But it will be troublesome in the mountains.

The cost is quite high.

But if the contract says this and the service is provided, then you have to go no matter what.

But when the RV company sent a professional team over, before they met Qin Feng, their legs trembled when they saw the mountains.
Chapter completed!