"Greg D. Moore (Strider)" wrote:

"Norris Watkins" wrote in message
om...
Hello:
1. When you make an international phone call - say from NY to China -
how does the voice data travel ? Does it have to be send to the
satellite and then received at teh ground, some distance away, then
sent to another satellite till it reaches the destination country. ? I
mean is there any direct satellite to satellite communication. Or is
it always bouncing between teh satellite and the ground at an angle.

Generally ground to sat to ground and that's it.

Sat to sat communication is fairly rare.

It's been my imprression that there may be some military sat-to-sat
stuff going on at 60 gigahertz. This band is readily absorbed by oxygen,
making ground intercept of these signals impractical.

(Googling for a minute)

Here's a reference:

http://www.ydi.com/deployinfo/wp-benefits-60ghz.php



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