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But the cost is higher at $1,650, with the advantage that it provides for BGAN services not available till now. This technology eliminates the necessity to use terminals that earlier cost a customer nearly $8,000. The advantage of this technology is clear digital voice and high speed data transfer. Gradually, the popularity of satellite phones started increasing and the average revenue collection marked at 30% increase for the industries involved. With a 60% downfall in the rentals for satellite phones, the consumer strength has multiplied into virtual millions. The growing consciousness among prospective customers about the ease of transmission of data and voice through the satellite service has resulted in further growth of the satellite phones industry in the United States. The growth has been indicating an upward trend for last five years.

Dawn of a era in wireless communications Recently the Federal Communications Commission (FCC), has granted authority to offer ancillary terrestrial component services (ATC) in favor of Globalstar. As a result, the Globalstar is eligible to set up ATC base stations and mobile terminals. Globalstar today provides a small lightweight dual mode handset with both satellite and ATC modes. It uses 11 MHZ of its 1.6 /2.4 GHz satellite radio frequencies for the terrestrial wireless service. The advantage is that this allows the phone to work in dual mode.

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Inside a vehicle the phone set will work in ATC or terrestrial mode and outside it will work in satellite mode. The first modified dual mode demonstration was made in York in 2002. Even when the local telephone infrastructure stands disrupted, the satellite phone system can provide seamless communications. However, the Globalstar satellite phone system is not without limitations. It cannot be used like a common cellular phone in a building or in a vehicle.

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The inventors are now in of a handheld phone that has no dead spots and works everywhere. Another requirement in present day circumstances is adding broadband data and multi media applications to seamless strata of wireless communication. However, that is in a distant future, while the current satellite phone service has to be used outdoors with at least 80% view of the sky or using an external antenna.

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Use of satellite telephone different from each other Ordinarily you require the same type of satellite phones in entire group to communicate properly. There can be no use of two types of satellite phones in part. Otherwise the system of communication would be in a round about way. For example calling a Globalstar phone from an Iridium phone will sent the call to first the Iridium constellation and then to an Iridium gateway.

Then it will go through a land line to the Globalstar gateway. Sometimes the required gateway gets disrupted and difficulties are experienced in communication. Globalstar has a constellation of 48 Low Earth Orbiting satellites. It covers 120 countries and has the one of the best transmission quality. Iridium has a constellation of 66 Low Earth Orbiting satellites and a planetary coverage.

The Inmarsat use portable terminals with Geo-stationary satellites. This set up is quite simple and user friendly. Satellite phones for emergencies In these days of hurricanes, terrorism, and power failure, everyone should be in readiness to address any unforeseen emergencies.

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