Scan carrier to Verify Cellular numbers if Active

Program: Need to verify if a range of cellular numbers if they are active or inactive. Active cell numbers will be used to send SMS/TEXT messages, via a bulk mailer we already have. I need a program that will call all cell numbers within a range, let it ring only once. If it rings, then this number is a valid existing number. If it gets a busy ring, this too is a valid number. If any other returned or confirmation that indicates this cell is not in use, then this cell is INVALID. Only one of the following conditions should occur: 1. Ringing only = Active 2. Ringing and answered=Active 3. No ring=INACTIVE 4. No Ring, but operator answered=INACTIVE Range example: From 591.0001 to 594.9999. Also, the caller ID must be hidden. I do not want this MISSED call to be identified. The result is to report all VALID, INVALID or none existence numbers. Possible Tracking mechanism: Perhaps, the readings of the “AT commands” of the USB/PCI modem with a GSM SIMM chip will give you the best results with the computer running the script. The AT commands tracks every step of the process To be run on a Windows 7 PC I have 2 GSM WaveCom USB modems for this project. AT Command User manual: [login to view URL] Let me know if your firm can do this or if you have an alternative solution