Thanx Amrith for the reply and i will try it tomorrow.
Can you pls tell me how the crystal frequency like 4Mhz or 20 Mhz influences my delay which i gave in the program.
Because when iam executing ATDXXXXXX; command, its nt getting successful sometimes but is working fine with Hyperterminal all the time and also iam started working on gprs for data transfer from remote to home pc, pls give me some guidance. thanx …