go for the links it might

[dagakshay]

go for the links it might help you th emain thing is syncraonization b/w you controller and modem.. (specially the first two links)

 

http://www.engineersgarage.com/microcontroller/8051projects/gsm-interface-8051-microcontroller-circuit-code

 

http://www.engineersgarage.com/microcontroller/8051projects/interface-gsm-module-8051-microcontroller-circuit-code

 

http://www.engineersgarage.com/microcontroller/8051projects/interfacing-gsm-8051-microcontroller-circuit-code

 

http://www.engineersgarage.com/articles/gsm-gprs-modules