A maximum of security
Device security is considered the most important security issue. Therefore all communication over the Internet are going through outbound ports only, no inbound ports as used on Web Servers are open. Furthermore, all communication is based on modern security mechanisms. Finally, all activities are controlled by the Device, not by the Terminal. The Device decides which Terminal is allowed to connect to and when it is ready to do something. As a result, the Device will remotely control the Terminal instead of vice versa!