PLEXUS: a dedicated networking infrastructure that allows for extremely reliable data communications
To support cashless payments, Sendrato uses redundancy in data-communication by bundling together multiple existing and ad-hoc networks. Existing networks can be cellular networks, wired (LAN) networks or wireless (WLAN) networks or any other available network offered by existing network service providers. Ad-hoc networks are networks that are created by ourselves. These networks include IEEE 802.15.4 type of networks that utilise the following frequencies: 433MHz, 900MHz and 2.4GHz.
Extremely reliable: 99,9999% uptime
Data is sent simultaneously by all of the networks
Resilient to (temporary) power failure
Each PLEXUS node is remotely monitored
Simultaneous data communication
With PLEXUS data is sent simultaneously over all of the networks e.g. cellular, 2.4 GHz, 433MHz, 900MHz, LAN or WLAN. The first data message received is processed, while the others are disregarded. The reply data message is again sent back over all networks and the first message received is used. So, if any of the available networks is slow or goes down, the remaining networks continue.