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A satellite telephone, satellite phone, or satphone is a phone that communicates immediately with orbiting communications satellites. Depending on the architecture of a specific system, coverage may include the entire Earth, or only particular regions.

The phone equipment, also referred to as a terminal or perhaps earth station, varies widely. A satellite phone handset has a dimension and weight comparable to that of a late 1980s or early 1990s mobile phone, but mostly with a large retractable antenna. These are popular on escapades into remote places where terrestrial cellular service is unavailable.

A fixed installation, such as used shipboard, include large, rugged, rack-mounted electronics, and a steerable microwave antenna on the mast that instantly tracks the overhead satellites. Satellite phones have notoriously inadequate reception indoors, though it may be possible to get a consistent signal near a window or even in the top floor of a building if the roof is properly thin. The phones have connectors for external antennae that are frequently installed in vehicles and buildings.

Some satellite phones use satellites in geosynchronous orbit. These systems can maintain near-continuous global network with only three or 4 satellites, reducing the launch costs.

The disadvantage of geostationary satellite systems is that several areas even where a very clear view of the sky is present the line of sight between the phone and the satellite is ruined by obstacles like steep hills and forest and the user will need to find higher landscape before being able to use the phone. This is not the scenario with Low Earth Orbit (LEO) services - even if the coverage is blocked by an obstacle one can wait a few minutes until another satellite passes overhead.

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It offers the longest battery life in the market, the most robust handset, reliable global coverage, clear voice quality and ease of use - all at the most competitive price point in the market.

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Satellite phones are not new. They are used by professionals in the media, government, and even first aid. However, the Isatphone-Pro is a cut above the rest.

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Maybe you're planning on taking a trip to the Great Outback of Australia? Sounds delightful but as you see chances are that you're going to need a satellite phone during your stay.

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This new global handheld satellite phone due out in June by Inmarsat (IsatPhone Pro) has a longer battery life, clearer voice quality and will be priced more competitively than the competition.

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The IstatPhone-Pro is set for release in June of 2010. Through the innovation of Inmarsat and other partners, they are able to deliver the ultimate satellite phone.

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Satellite phones are high technology applications which have changed the face of global communication. Now we can communicate from the most remote parts of the globe without any hassles.

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It is essential to think about the type of satellite handset to get since they come with different specs for users.