satellite phone

Compared with wired communication and microwave communication, satellite phone has the following advantages and disadvantages: theoretically, it can communicate at any two points in the satellite coverage area with few communication transmission links, but it can't communicate in a large building or when objects such as mountains block the equipment, and there will be delays in the call. Here are some commonly used satellite phones.

7.3.4. 1 iridium telephone

The satellite of Iridium satellite mobile communication system covers the whole world, which is characterized by ensuring that there will always be a satellite above the caller at any time. Compared with geosynchronous satellite, its signal transmission distance is shortened by 98%, thus greatly reducing energy consumption.

(1) usage

1) Choose a position where you can see the sky outdoors, away from buildings and overhead objects, and rotate and extend the antenna to a position perpendicular to the ground.

2) Open the flip cover of the satellite phone, and press and hold the power button (the red button in the lower left corner) to turn it on.

3) The satellite phone has a PIN code (power on password). Enter the PIN code (new PIN code:11) and press the OK button, and "Done" will appear on the screen.

4) Then "Search" appears on the screen. When "Iridium" appears on the screen and the signal strength symbol is displayed in the upper left corner, you can talk.

(2) Dialing method (taking Beijing telephone number as an example)

1) Iridium calls the fixed telephone number: 00+86+ 10+ fixed telephone number, such as: 00+86+10+8205 ×××××).

2) When making a mobile phone call with iridium satellite: 00+86+ mobile phone number (for example: 00+86+13901××××).

3) When making an Iridium telephone call from a fixed telephone: 00+1480 7682500+12 digits, such as 00+1480 7682500+12 digits, the fixed telephone must be authorized to make international calls.

4) When making Iridium phone calls by mobile phone: 00+1480 7682500+12, for example: 00+1480 7682500+12 digits, the mobile phone must be authorized to make international calls.

5) The other party's Iridium phone number: 00+ 12, the called party's Iridium phone number, such as 00+ 12, and the Iridium phone number has been granted international long-distance rights.

6) Iridium phone balance inquiry means that every time you dial, the system will automatically remind you (English voice prompt) how many minutes are left in this call, and the phone bill is calculated in minutes.

(3) Precautions

1)SIM card must be plugged and unplugged in the power-off state to avoid damaging Iridium mobile phone.

2) Recharge the battery after use and fully charge it.

3) When the mobile phone antenna rotates, pay attention to prevent the antenna from folding. The keyboard should be turned gently and steadily.

4) Try to use it in an open area with good signal.

5) When it is used on the ship, it should be properly kept and placed in a low safe place to avoid being broken when rocking the ship.

6) Every time you use it, please keep the antenna facing up and keep a certain distance from the head to reduce the radiation of electromagnetic waves to the head.

7) Please remember the power-on password (PIN code). If you enter the wrong power-on password, please don't enter the wrong power-on password continuously, or the phone will be locked for more than 3 times. If the power-on password is entered incorrectly, you can enter the unlock code (PUK 1 code) to unlock the locked mobile phone, but you need to re-enter a new power-on password. If 10 wrong PUK 1 code is entered continuously, the SIM card will be burned.

7.3.4.2 Maritime Satellite Telephone

Maritime satellite phone is the only communication means in the world that can provide global, all-weather and all-round satellite mobile communication and distress safety communication by connecting the international public telephone network and maritime satellite network. The business types of maritime satellite telephone include distress telephone, station-to-station telephone and person-to-person telephone. Maritime satellite telephone is suitable for communication between ships and between ships and land. At present, maritime satellite telephone services have been opened in all parts of China.

Maritime satellite phones are bulky and have a dial pad. When using this number, you need to enter the country code, area code and telephone number. When used in China, the maritime satellite terminal should aim its antenna at the satellite over the Indian Ocean in the southwest direction to ensure that it can receive the best signal.

7.3.4.3 Ouxing Satellite Telephone

Eurostar satellite phones can basically cover China. There are many kinds of products, among which Ou Xing Hughes 7 10 1, SO-25 10 and SG-2520 are commonly used in China. It integrates three functions of satellite, GSM and GPS, and provides five services of voice, short message, data, fax and GPS positioning.

7.3.4.4 Asian satellite phone

ACeS satellite mobile communication system is a good equipment for ships, mountain workers and tourists sailing in Asian waters to communicate with outlying islands. Asian satellite phone has the characteristics of no need for internet access fee, monthly fee, sharing fee and recharging phone bill at any time.

Asian satellite phones are used in rural areas, forests, mountains, deserts, geology, exploration, mines, oceans and other fields far away from cities.