Problems with Huawei-GSM-card


I've some problems with a Huawei ME909-GSM-card on my APU.

First on startup there is no WWAN-connection cause the card needs more time for startup. If I add a sleep in the init.d-script, the WWAN-connection is fine, but also the other connections are getting up delayed.
First question: is it possible to start up only die WWAN-connection with a delay?

Sometimes I need to restart the GSM-card. After I've send the AT-command the pppd-process has stopped and a new WWAN-connection isn't possible until a restart of the APU.
Is it possible to establish a new connection without restarting the APU?