Abstract: A communication system for communication with a plurality of mobile terminals. A plurality of earth stations are arranged to communicate with mobile users via a plurality of orbiting satellites. A plurality of gateway stations interconnect terrestrial equipment with the earth stations and a store stores access data for the mobile terminals. The mobile terminals are divided into first and second categories, the store retaining corresponding different status information and both the first and second categories communicating with the satellites. Also provided are first and second different communication channels between the gateway stations and the earth stations, and a route control system for selecting one of the first and second channels, in dependence upon the category of a mobile terminal.