RB411U, mPCI-e 3g card, give user signal strength feedback

Hi

I have about a dozen RB411U boards with Sierra Wireless MC8705 cards that I am about to deploy, and I would like some way to give the installer (who may not be carrying a laptop!) some feedback about the 3G signal strength.

Has anyone managed to successfully implement a script that provides an indication of the signal strength via the LEDs, beeps or some other means?

Thanks!