1. Internet was created at 60-s as DARPAnet. It was designed to survive in a global nuclear war.
2. Cell phones doesn't depend on satellites yet.
3. Were local tv broadcasters lost satellite signal they would be able to use old VHS instead. The later could start the world digital rights war, though.

P.S. I don't think that absence of TV is an emergency. There is nothing worth to watch anyway.