When people communicate, the sphere in which this communication takes place is fundamental to how people understand what happens. Being in a family, at school, in a schoolsclub, a network, at work, with friends or in love, the sphere is distinct. As Peter sloterdijk pointed out, spheres are like the bubble a child blows. Fragile, holding our attention, guiding our imagination and reflecting the world.
When communicating by phone, with all our attention we create a sphere in which we meet, even if only the voice is carier of our presence.