I found no Product on the Market to solved my Problem.
A Bus Company need Internet, SMS, Phone Call for 3 Contrys.
What important is a huge (Squid) Proxy who can save thousand Website. How with the new SSD thats isnt any Problem.
VoIP for Internal Communication. (GSM Calls -> VoIP) for that i could use Asterisk.
So how can i handle with Multiple Simcards?
3x Country -> 2x Simcards each for diversity.
That would mean normaly 6 Cards?!
I know that my Thinkpad need an Simcard Slot who get plug in. So its possible that the Module connect to an Simcard and at the Border station the disconnect the Simcard take the next and go online?!