The_Inner_Workings_Of_the_Satellite_Phone_System by MonikaKam

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									Title:
The Inner Workings Of the Satellite
Phone System

Word Count:
399

Summary:
The different ways that communicati
on between two people is achieved w
ith a satellite phone system. Sate
llite phones allow communication fr
om anywhere in the world.


Keywords:
satellite phone, cell phone, telepho
ne


Article Body:
In a lot of the very remote places
around the world, satellite phones
are becoming more and more popular.
  Since these phones do not require
 cabling, the need for communicatio
n in these areas has been covered b
y the use of these satellite phones
. A lot of these remote areas just
 do not have the infa structure ava
ilable to allow for a more traditio
nal land line phone. Radio frequen
cies could be considered as well bu
t all the frequencies for radio are
 for the most part, already occupie
d with other things.

For communication, satellite phones
 use what is called low earth orbit
ing satellites or LEO for short. T
he main advantage to using these ty
pes of satellites over other types
such as geo stationary satellites,
is that there is very little latenc
y. Since low earth orbiting satell
ites are quite a bit closer to the
earth, there is less delay in commu
nication.

Each satellite phone system include
s a number of LEO satellites usuall
y called a constellation. The use
of many satellites makes sure that
there is always a satellite visible
 to the phone so that calls can be
made or received whenever they are
needed. This ensure that there are
 never any missed calls or calls th
at get go through to the person tha
t you are calling.

There are a number of different pro
viders that offer these types of ph
one services - Iridium and Globalst
ar are just a couple and there are
a number more. Each of these compa
nies use various technologies to ge
t the service done but in the end,
they are mainly all the same. They
 all provide the satellite communic
ation service.

A few of these companies use a mult
iple access method of time division
 to allow and increased number of c
alls. This includes connections th
at are satellite to satellite and t
he phones work directly with these
satellites. There are also digital
 technologies that are used to mana
ge the traffic of calls and sometim
es this is called, code division mu
ltiple access.

When division multiple access is us
ed, the satellites are used to forw
ard the incoming calls directly to
the telephone gateways that exist o
n the earth. This way, the call ev
entually goes through the tradtiona
l land telephone network.

With the different ways this satell
ite phone technology work, the end
result does not change. The basic
thing is that in the end, you get t
hrough to who ever you need to talk
 to!

								
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