GSM Voip Gateway made with GSM mobiles linked by USB cable and audio jack to server for generating calls on selected routes using SIM card credit.
Voip signal is delivered to mobile by converting H323 and SIP to analog audio and trasmitted to mobile by mic jack.
Must support any number of mobiles, AT commands by USB with generic device driver, front end with monitor, log and SIM status required.
Must be Asterisk compatible and support H323 and SIP voip protocols.
please visit http://www.celliax.org