How can i communicate between two GPRS enabled,SIM-508 module, using AT command via hyper-terminal of PC.
"i am using Keil, in programming the 8051 for all these task all together"
But the problem is general to any IP network - it has nothing specifically to do with the 8051, or Keil - or even GPRS!
Perhaps you should forget about the 8051, Keil, and GPRS for a moment, and think about how you'd get two PCs to communicate from different LANs...
"it's clear that i have to communicate via static IP to each other or VPN"
You still have the option of going via an intermediate server - possibly your own PC.
Even if the IP address is static, it may still not be public - and you still have the issue of how you will get each unit to know the other's IP address...
Sir,can you plz seuugest me some forum or web-link which related to AT commands query.
Mohit Bitadvance Pune
But it's nothing to do with AT commands, is it?
As I said, the issues of IP addressing apply to any IP network!
What you need to understand is IP networking!
eg, try: compnetworking.about.com/.../bldef_tcpip.htm