I connect to the internet using Wavecom FastTrack GPRS modem using Windows XP. I was able to send/receive SMS using AT commands via hyperterminal. I also setup a dial up neworking (DUN) to connect to internet using TCP/IP. Currently, I am developming a program which allows me to exchange data over WinSocket/TCP/IP over the DUN session. However, this program need to send/receive SMS pierodically (every 5 minute) so that it can receive command sent from other device via SMS.
My problem is currently I am relying on sending AT commands to send/receive SMS but when I am running under DUN session, the COM port (COM1) was completely taken over by the DUN session. How can I bypass DUN to send AT commands to serial port or is there any way I can send/receive SMS over the DUN (which is ppp )? The most important is how can I detect and receive incoming SMS when the DUN session.