The Passive Data-Spare saves time and money in installation of Ethernet networks and promotes the benefits of using one central source to power all the IP devices in the network. Simplifies the modification of a device to be Power over Ethernet enabled, saving all the risks involved in redesign of the power stage in this device by a simple add on box. The Passive Data-Spare active splitter supplies a totally secure power source, keeping the Ethernet device fully protected against any misuse or mistaken connection.