[Asterisk-Users] GSM modems

[Stuart L. Morris]

Has anyone tried connecting * to a GSM mobile phone with internal voice 
modem?

I'm trying to route calls to mobile phones out over a mobile phone 
connected to my * server via a serial connection. In this way these 
calls will be much less expensive than if they are routed via a landline.

I'm guessing that I start in the modem.conf file but the only references 
on the web are a couple of years old and generally to people trying to 
use HCF modems as PSTN interfaces.

Thanks

Stuart.