Usb modem connected to android tablet

This project involves a plain usb fax modem and an android tablet. I need to connect this usb modem to the android tablet and just be able to get the caller id, when the phones rings, inside an application. The problem is that all the modems in the market don't have drivers for android. So you must find a solution to this problem, maybe by doing some low architecture programming. But again the only feature that i need to be working is the caller id retreivememt. You can select the usb fax modem model. Thank you