Delay is inherent in satellite connections because of the time it takes for the signal to reach the satellite and return to earth. This delay is fixed and cannot be reduced.
There are a number of things that can lead to poor voice quality over a satellite connection. You should discuss the problems you are having with your service provider and see what explanation they offer for the problem. They can run diagnostic tests. Also ask if they have any workarounds to suggest. Some service providers may not be offering proper quality of service (QoS) mechanisms in their network and this can lead to poor voice quality when the network becomes congested. You should also talk to other service providers to see what they have in place to ensure the best possible voice quality.
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