mobile radio processes

transmission route:
application --- GSM modem --- mobile network --- mobile system

advantages	disadvantages
easy to use	small amount of data
	expensive (one "data unit" = one SMS)
	"old" technology

transmission route:
application --- DSL --- internet --- mobile network --- mobile system

advantages	disadvantages
always online	internet access needed
any amount of data	administration needed
charging by amount of data
cheap

transmission route:
application --- DSL --- internet --- mobile network --- mobile system

advantages	disadvantages
always online	internet access needed
any amount of data	administration needed
charging by amount of data / flatrate	vacancies in adequate supply (countrified areas)
very fast	end device not available