Thanks, but it is only for my personal use.
I've been looking for some freeware or some tools to do it myself.
I didn't know about the limitations of WM5/6. This being the case, I think I'll put back in operation one of my old mobiles with an integrated modem, connect it with the data cable and use AT commands. I have already done something similar a few years ago for machine monitoring with one GSM modem (A2 Falcom); maybe I still can find something in the old backups.
Thanks again.
gyc