What card does the satellite phone use?

Satellite phone card of satellite phone.

In 20 18, China Telecom launched satellite phones for the first time in the commercial market. This marks China's entry into the "mobile phone era" of satellite mobile communication, which fills the gap of domestic independent mobile communication system and breaks the dependence on foreign satellite mobile communication services.

Telephone cards can be used to communicate on demand at any time in any corner of the motherland, and the situation of "out of service area" will become history. The signal coverage area includes the whole territory of China, the territorial sea and the first island chain; Around China, the western Pacific and Indian Ocean.

Extended data:

Compared with wired communication and microwave communication, satellite communication has the following advantages and disadvantages:

1, far: refers to the long distance of satellite communication. As the saying goes, "If you stand high, you can see far", and the maximum span that synchronous communication satellites can "see" to the earth can reach18,000 kilometers. Any two points in this coverage area can communicate by satellite. Generally, there is a relay station about 50 kilometers for microwave communication, and the coverage distance of a synchronous communication satellite is equivalent to more than 300 microwave relay stations.

2. Multi: refers to many communication paths and large capacity. A modern communication satellite can carry several to dozens of transponders, provide several TV channels and thousands of talkers;

3. Good: refers to good communication quality and high reliability. Satellite communication has few transmission links and is not affected by geographical conditions and meteorology, so it can obtain high-quality communication signals;

4. Poor: when the equipment itself is blocked by large buildings or mountains, the communication signal does not exist or flicker;

5. Slow: It means that there is a delay during the call, resulting in poor connection.

Zhongguancun Online-China Independent Satellite Phone Official Number: No Blind Area for Service.

Baidu encyclopedia-satellite phone