[Asterisk-Users] Satellite WAN

[Steve Kennedy]

On Wed, Nov 02, 2005 at 12:31:48PM -0500, Adam Moffett wrote:

> I have no experience in the matter whatsoever ;)
> But, I can say that long distance phone calls (non-voip) are sometimes 
> carried over sattelite when fiber is not available. 
> It must be possible for voip, but the latency and jitter would be 
> tremendous and although I am not an expert on the matter, I would 
> suggest that you would only be replacing one set of problems with a new 
> set of problems.

Using TDM delays are horrid (I remember calls to the US before TAT8 was
installed and most calls went via satellite).

Geostationary orbit 30K miles (approx), therefore up-leg plus down-leg
is 60K miles. Light travels at 186K miles/s, so that's a 1/3 of a second
delay in one direction (ignoring any delays through the satelitte to
reduce interference etc), so that's 2/3s there and back.


Steve

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