I have Sony Ericsson T68i cell phone. I would like to use Sony Ericsson T68i (AT&T is the service provider) as GSM modem to connect to a PSTN modem. AT&T doesn’t support CSD. I guess I can use an ISP to establish a CSD connection with PSTN modem. Since ours is an embedded product with some real time operating system we will be using AT commands to connect the GSM modem to a PSTN modem. To test the concept I am using hyperterminal to communicate with T68i.
I know that I need to create a GSM data account on T68i. What is the AT commands sequence to establish a CSD connection with PSTN?
Thanks for your help.