Here's what he wants to know.

I have a computer that is connected to a very fast LAN.
I want to be able to connect my iPhone to this computer with wifi.
So I can use the phone in "make calls using wifi" mode.
The device should have the drivers built in (in other words, it connects
He wants to know if there is such a device that will allow him to do what he says above. He's not in a home. So, I'm assuming he travels.