A Scientific Theory of Consciousness I started using the term non-physical last week and what I mean is if you see a rock then your brain holds the rock as mental content. If you need four rocks for a project, the rocks may or may not exist but you can manipulate the idea of rocks in your brain. You should be able to identify an entire physical process in your relation to rocks. Sight, touch, mental process, decision making, muscle control.
As for communication, if you say brain state is the physical brain with mental content then content is encoded to physical matter, passed to another person as physical matter, and decoded by that person to get mental content.
It should be easier to get closer to what consciousness is if you get information, communication, time perception and theories of physical matter right first. You should also do your best on the monism, dualism question. I just like the idea that mental content emerges from the physical matter of biological brains.