Pretty much what the title says. I don't even know if this is possible or even in the right category. Heres what I want to do. I want to plug my cordless land line phone into my laptops modem. Then I want to setup a VOiP system on the laptop. So when I make a call or someone calls me using the VOiP number. It'll use the modem to use the phone. I hope that makes sense. Anyway, best of luck to the creativity of getting this working.