Iphone

Iam developing an GPRS based embedded application which will connect to internet(remote server) and send & receive data. I have two questions.

Question 1.
I want to establish an internet connection using BENQ M22, GSM GPRS module. I want to know whether BENQ M22 has PPP & TCP/IP stack.? If so how to make use of the inbult stack.

Question 2.
I have another GSM module SIMCOM (Part No SIM100S32-H) , which has got inbult PPP & TCPIP. The Application note gives me the following steps to connect to internet using the inbuilt stack.
1.at+cgdcont=1,"IP","myapn"
2.at+cstt="myapn","<username>",<pwd>
3.at+ciir<cr> --- to activate gprs
4.at+cisfr<cr> -- get local address
..

The 1st and 2nd AT commands are accepted and when i give the 3rd command Iam getting an Error PDP+ DEACT. What does this indicate?. Where is the problem. My SIM card is also GPRS activated.

Can any one suggest any solution .

Iphone

You should not send "myapn" as the APN. The APN (Application Node) is the name of the virtual private network at the SP that you are connecting to.

Most SP's set it up as "Internet". Try that, it may solve your prblem.

On most modules (I assume the BENQ, which uses Wavecomm I believe also) you need to connect using an ATD string. Usually this is something like ATD*99***1#. This should bring back "CONNECT", using the context provided.

The AT commands you list seem to only set up all the parameters needed before you can connect.

Try this and let me know how it goes.