Cellphone Sniffer - GSM Repeater

I need a software with a hardware (I think it is a gsm repeater with input for computer) can capture all the phone numbers of a perimeter. this technology is widely used at airports in INDIA and also in Las Vegas to capture the numbers of cellulares and then send sms with offers. The software basically need: - Capture the numbers that cellulares perimeter and write to a file. - Option to run a program in windows command line to send an SMS through another existing program. professionals must understand the hardware chosen. if you already know some solution like I also accepted. I contract to do any configuration.