Werner Almesberger writes: >Michael 'Mickey' Lauer wrote: >> I could be wrong, but IIRC FSO is powering the modem down if you shut it >> down >> from console. gsm0710muxd is issuing [EMAIL PROTECTED] once you SIGTERM it. > >That [EMAIL PROTECTED] doesn't cut power to the modem. Instead, it tells the >modem to "power down", i.e., to enter its own standby mode, from >which it can be awakened by "pressing" the modem's "on" button. >(That "button" is in fact a transistor controlled by MODEM_ON line >which connect to the CPU's GPB7.) > >What does cut power to most of the GSM chipset is the GSM_ON line >which connects to the PMU's GPIO2. > >Alas, the modem's RF amplifier is not controlled by this (it doesn't >like anything to get between it and the battery), so the GSM >subsystem cannot be entirely cut off.
I'm confused -- do you mean there is no way to turn off the modem's RF amp? What do other phones using it do to comply with airplane regulations?
