Remote feeding device for a terminal in a telecommunications network , concentrator and repeater with such a device

A remote power a device, for providing remote power a to a terminal in a long-range communication network, comprising 1st, wherein the resistor 2nd, the back is connected with the resistor 1st, and is lower than the resistance of 1st resistor. A time is 1st threshold voltage 1st the resistor both ends of the voltage comparing, and realizes with 2nd threshold voltage 2nd the resistor both ends of the voltage comparing. Further - comprising switching device, and less than the switching device of a remote power a current the threshold 3rd (current which is interposed therebetween between 1st and 2nd threshold currents); the resistor 1st is a remote power circuit is serially connected; and switch detection device is greater than the threshold 3rd current to a remote power a current, the resistor 1st is the resistor 2nd multiplex, and a remote power circuit is serially connected. Application a forwarder and concentrator for local area network.