VoIP over satellite?

I currently have Vonage and TimeWarner cable. For over two years I haven't had a single interruption due to their malfunction and the sound quality is superb. It's hard to understand both Directv and Dish Network marketing language, yet it appears that both offer hundreds of TV channels and DSL for Internet (and telephone). I don't want to go back to slow DSL, even both satellite networks are much cheaper. Besides, I suspect that VoIP over satellite is unreliable: if I cannot watch TV during snowstorm it would be a minor inconvenience, while depriving me of 911 connection is unlawful.
Who knows for sure?

I really depends on how things are hooked up, My modem, telephone, TV and internet hooks to the cable and out side the house the phone is pulled off and goes into the regular phone lines plus the modem has a battery that is good for 6 hours.

County disaster planning requires that type of hookup for emergencies.

I decided that the best policy for me now is to keep my present arrangement and wait for fiberoptic RCN to lay their superfast cable on my street. My friends live within a mile from me and they already switched from TW to RCN.

That sounds like a winner to me also!. :D