In a preferred embodiment of the invention, at the POS incorporating the system of the invention, three wireless communications networks are integrated, as explained schematically with reference to FIGS. 2A-2C. In FIG. 2A the first subsystem is described as a wireless bus 70 which connects to several types of devices. Fuel dispensing units 72, POS controller 74, global network 76 are a few types of devices connected to the wireless bus 70. In FIG. 2B, the same system is described as a wireless LAN (WLAN) 82 to which are linked dispensing units 72 POS controller 74, and global network 76 and other devices 78.
A fuel dispensers in the POS is directly associated with at least one transceiver, hereinafter referred to as a dispenser unit (DU). The DU communicate with two types of transponders. An active transponder, or an active vehicle tag (AVTAG), and with a nozzle transceiver (NTR) which is also an active tag.
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