The average delay on satellite is 500-600ms round trip. You have to make sure that the delay is not more than 1000ms. My larger circuits are via satellite and they work just fine. You have to make sure that the satellite levels are always at a good level and that you use C-band and not KU-Band. C Band is not affected as much by weather. Ku is just like the directv service where if it rains or a big cloud gets in the way you loose the signal.