Answering Amen thru live hookup

May one answer Amen, Kaddish, Kedusha through a Telephone, radio, live video/audio internet hookup?[1] Some Poskim[2] rule one is not to answer Amen or Kedusha in such circumstances.[3] Other Poskim[4] rule one is to answer Amen and for Kaddish/Kedusha.[5] Practically, one may be lenient in this matter.[6] [If however there […]