I had installed an Asterisk in my raspberry, and I also bought a gsm shield(SIM900).
well, I intend to make the calls from the asterisk use the shield gsm to be forwarded.
So, I would like any information about where to start.
Will I have to write a new driver to make the asterisk recognize my gsm module?( migre.me/o4CuA ).
Where could I get information and documentation about that?