Satellite telephone is based on satellite communication system to transmit information. Compared with traditional communication means, it has a wider coverage area, and can almost achieve any two-point communication. After nearly two years of efforts, China Telecom has for the first time released signals to the commercial market. China has entered the "mobile phone era" of satellite mobile communication, filling the gap of domestic independent mobile communication system and breaking the status quo of relying on foreign satellite mobile communication services. Tiantong satellite has wide coverage, strong communication ability and no blind area.
At present, Tiantong satellite mobile communication system has achieved a comprehensive coverage of China's territory and territorial sea, which can be widely used in marine fisheries, emergency rescue and other scenarios. In the service area, users can use voice, SMS, data communication and location services. In addition to the handset, there are a variety of terminal types such as vehicle terminal, Tiantong cat, etc. users can also directly connect terminals and realize satellite communication through their own mobile phone applications. At present, the system is operated exclusively by China Telecom, with a signal section of 1740. Users can apply for handling online or part of offline business hall.
Lu Junli, general manager of China Telecom Satellite Communications Branch, said: since March 2018, we have had trial commercial use, up to now, nearly 30000 users. After formal commercial use, it can be used for a wide range of users. At present, the basic package cost of the previous year is 1000 yuan a year, including the call fee of 750 minutes.
The satellite used by Tiantong system is the "tiantong-1" satellite launched in 2016, which is also the first mobile communication satellite in China. On August 6, 2016, tiantong-1 satellite was successfully launched, which is the first satellite of China's satellite mobile communication system. The satellite, chip and terminal in Tiantong system are all developed and produced in China, which can get rid of the long-term dependence of Chinese users on foreign satellite mobile communication services and guarantee the communication security of users.
In the process of fighting many major natural disasters, Tiantong system has undertaken the task of emergency communication support. In the future, the system also plans to provide a wider range of services globally.
Sui Jing, deputy director of the information and communications administration of the Ministry of industry and information technology, said: we must further strengthen the infrastructure construction of the Tiantong system, intensify the promotion of Tiantong international business, create quality services, enter the international market and serve the "one belt and one road" construction.
How to handle it?
The national customer service hotline of Tiantong satellite business is 4008710000, which provides users with consultation, handling and after-sales service of Tiantong satellite business.
Advantages and disadvantages of satellite phone:
Compared with cable communication and microwave communication, satellite communication has the following advantages and disadvantages:
Far: refers to the distance of satellite communication. As the saying goes, "standing high, looking far", synchronous communication satellites can "see" the largest span of the earth up to 18000 kilometers. In this coverage area, any two points can be communicated by satellite, while the microwave communication is generally set with a relay station about 50 kilometers, and the coverage distance of a synchronous communication satellite is equivalent to more than 300 microwave relay stations;
Multiple: refers to the number of communication channels and large capacity. A modern communication satellite can carry several to dozens of transponders, and can provide several channels of TV and thousands of channels of talkers;
Good: good communication quality and high reliability. The transmission link of satellite communication is few, and it is not affected by geographical conditions and weather, so it can obtain high-quality communication signals;
Living: flexible and adaptable. It can not only realize the communication between any two points on land, but also between ship and ship, ship and shore, air and land. It can form a multi-directional, multi-point three-dimensional communication network;
Province: low cost. Under the same capacity and distance, compared with other communication equipment, the cost of satellite communication system is less. The cost of satellite communication system does not increase with the increase of communication distance. With the maturity of design and technology, the cost is still reduced;
High: it means that the standard of communication tariff is higher than that of cable communication and microwave communication, which is ten times or even dozens of times of its tariff standard;
Poor: no or flickering communication signal when the equipment itself is covered by large buildings or mountains;
Slow: refers to the delay phenomenon in the call process, resulting in poor connection.
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