i have problem with GPRS

[CaspianCorps]

hello to all and GSM man

can U Help me on this Command:

AT+CGDCONT=1,IP,APN,PDP ADDRES
.
.
AT+CGDATA=1

we don't know exactly How to Use of this command
we have an error after use of AT+CGDATA=1 in C#
and we don't know how we can use it
and What's the PDP ADDRES ? is it the same as server ip address?
Can U show me a useful document about communication between GPRS and Computer or server about explanation of GPRS Networks and how to Connect to it?
thanks a lot
:?:

 

[FvM]

What's the PDP ADDRES ? is it the same as server ip address?

Yes, it's a (local) IP address. But the value is usually omitted and set later during IP setup negotiation.
Also CGDATA must not necessarily be used. A special ATD syntax is often used instead.

I suggest to refer to the documentation and application notes of your GPRS modem. You should also know, if intend to perform the communication through PPP protocol, or if your modem is supporting alternative TCP communication options.