said by coxta: I had heard that it was related to satellite signal propagation.
When you say Satellite I assume you mean geosynchronous satellites.
The problem with geosynchronous satellites is the extreme distance.
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en.wikipedia.org/wiki/Ge ··· us_orbitThey are about 25,000 miles high so trip each way is 50,000 miles if satellite is used in both directions that doubles to 100,000 miles. That means it takes about a half second for round trip.
High latency are not a big issue for recorded transmission but adding that much makes voice calls virtually unusable. Any echo that is present is now much more noticeable since it is delayed so much.
/tom