The GPS device has storage memory and will store all location data in areas that do not have cellular coverage.
When vehicles enter a mobile coverage area, location data is automatically transferred and the status of the trail is updated.
The only requirement for a solution to work is that the start up stop for vehicles has mobile coverage so that position data can be transferred. Skisporet.no use Telenor M2M sim cards in most units, but in some areas Telia M2M sim cards are used.
If you are wondering how the coverage is in your ski network, check: