Since he can not have visitors yet, here is what you can do to 'talk' to Tony.
Once he is moved out of the ICU and into a normal room, you will be able to text his phone, email, use facebook, chat, and probably play Guild Wars. He will be limited to 3 hours per day of computer and phone use, so he may not be able to respond.
For now, please do not call him. Talking on the phone will be something to work up to later. It causes the same problems as does visitation.
Thanks for the support you have shown him.