[Libusb-devel] How to send AT commands for mobile

[Vinicius <vps...@gm...>]

Hello group,
My name is Vinicius, I am a Brazilian student and libusb newbie.
I want to send AT commands to a Motorola V3 mobile. Where do I start  ?
I have managed to identify idProduct and idVendor, but I don't know how
to send any commands to the mobile.

Thanks in advance.