On the RUT240 the mobile data connection does not work reliable. Signal strength, SIM card ready, all is ok in the mobile overview, except 'Data connection state' which says 'disconnected'. The problem is intermittent, the problem does not always occur at boot. Powercycle or pressing the 'reboot modem' usually help, but this is not a workable solution.
According the the SIM card provider there is a working data connection while the Data connection state is 'disconnected'.
Diving into the system log, it seems there is no IP address. So when the modem boots and ends up disconnected the message is:
user.info Messaged: Start from new event "Mobile Data" "Mobile data connected: NL KPN Tele2 M2M"
If the modem gets a proper working internet connection:
user.info Messaged: Start from new event "Mobile Data" "Mobile data connected, IP: 10.153.231.125 NL KPN Tele2 M2M"
Firmware version: RUT2XX_R_00.01.14.4
Any help would be appreciated,