A satellite phone or satphone is a phone that sends and receives calls with the use of satellites instead of telephones or cell phone broadcasting signals. A satellite mobile phones only requires a clear vision of the sky. The advantage of a satellite mobile phone is that it can totally complete calls from everywhere. A satellite phone can work in the middle of the Sahara desert, at the top of Mount Everest, or from a clearing deep within a South African jungle. It is an vital tool for remote expiditions of all kinds, and gives good broadcasting on the seas and in the air.
A disadvantage of a satellite phone is a noticeable delay in conversations. The network must first pass through to the satellite, then to an earthbound gateway before go to the recipient. The recipient's answer will follow the same path in reverse, taking equally long to reach the caller. Satellite minutes are also more costly than cell phone minutes.
Nevertheless, these problems are extraneous when considering the function that a satellite phone provides. It can create a link to people from places where no other link is available. It also permits loved ones to keep in touch, like the researchers, excursionists and those in the military, and it can provide backup connectivity in disasters if ever cell phone sites or telephones might not be functional.
The three major satellite networks at present are Iridium, Globalstar and Thuraya. Iridium makes use of low orbiting satellites that minimize communications delays, but the more important is, it is the only present satellite reception that provides reception in the entire world. Rival Globalstar covers about 80% of the earth's landmasses, excluding northern and southern polar earth regions, while Thuraya covers some parts of India, Asia, Africa, the entire Middle East and Europe.
In favor of those who only need to use a satellite phone on atypical occasions, one can hire rather than buy . Hiring rates start at almost US$40 a week, but this does not include talk time, which can cost as high as $1.75 per minute. If buying a satellite phone outright, an agreement is in need with a satellite network, or pre-paid cards may be bought. Minutes are less expensive with a contract than when renting or purchasing prepaid, but are still expensive than cell phone minutes.
Satellite phones range charges according to signal areas. Iridium phones are more costly because they can make calls anywhere in the world. One newest entry-level Iridium satellite mobile phone sells for US$1,275, while other communication mobile phones start out at about half that price, and can be found for less. Because sat phones are so costly, they are often purchased used.
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Now, this comes with a caveat. Satellite world is usually not the same as day-to-day communications. I made the comment earlier that this is an economical solution to data transfer, but coming in at around A$4,000 it is not everyone's cup of tea.
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