Lakewood schools were using phone conferences before pesach and it’s working great. Internet is not needed.
But why am i getting the feeling that certain posters here are annoyed that some people don’t use internet. You want to use internet, good. they don’t, also good. Why does it bother you? if that’s how they want to live their lives leave them alone.
Of course i may be overthinking things, so just let me know if i am.