Iridium modem not detected when already connected and MM starts

[Thomas Bechtold <thomasbechtold jpberlin de>]

Hi,

the Iridium Modem is not detected (latest git version from 06 branch)
when the modem is already connected and MM starts. This can happen
because the modem has an external power supply so the OS can restart but
the modem is still connected.
Is it possible to detect the state and disconnect the modem before we do
anything else?

Cheers,

Tom