That's literally impossible. Imagine trying to learn Japanese by talking to a Japanese man on the phone, with neither of you being able to understand or see each other or what you're each doing. Without shared context communication is impossible. Best case, you and the Japanese man would create a new context and a new shared language that would be neither English nor Japanese that would allow you to communicate about whatever ideas fit through the phone line. Maybe words like "sound", "word", "stop", etc.