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Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 13: Basic Networking Terminology
      9  Wireless

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Video and Voice Transmission over IP
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Internet from Unstable Satellites

Now systems working from the unstable satellites get great popularity. Approximate lifetime of the satellite is 10-15 years. After that it is necessary to service the given orbit, or to anew due to heat. The time between a stable position of the satellite and time of its flooding is that time, when it is unstable. It is shown in figure-of-eight trajectory of its movement for the observer from the Earth. For constant reception of a signal from such satellite, the aerial is constantly be tuned. For these purposes, the expensive part of the systems it the tracking monitor. Nevertheless, what is the reason of such desire to accept a signal from the unstable satellite? Rent of capacity on such satellite is cheaper, than on the stable new satellite. Therefore Internet from such satellites is cheaper, which is the reason of the large popularity of these services. In addition, it is without geographical limits, with absolute high-grade connection style and it is guaranteeing cooperation with all protocols.


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Symmetrical Access
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Video and Voice Transmission over IP
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