A method for applying power management to a network system, the network system comprising a plurality of network nodes (101-1, 101-2, 101-3, 201) coupled to respective transmission lines (140, 240, 260), the method comprising: delivering power to a first network node of the plurality of network nodes through at least one respective first transmission line; determining, at the first network node, whether the first network node has excess power based on a power available through the at least one first transmission line and on a power consumption of the first network node; if the first network node has excess power, delivering, by the first network node, at least part of the excess power of the first network node to at least one second network node of the plurality of network nodes through an interconnection between the first network node and the second network node, wherein: the at least one first transmission line comprises at least one subscriber line (140, 240) connecting the first network node to at least one respective subscriber device (102-1,...102-6) configured to inject power over the at least one subscriber line, and/or the at least one first transmission line comprises at least one uplink line connecting the first network node to an upstream node configured to inject power over the at least one uplink line; and: the first network node and the at least one second network node monitoring their own power status and exchanging information about their respective own power status with each other, and/or the first network node and the at least one second network node detecting power status of each other. delivering power to a first network node of the plurality of network nodes through at least one respective first transmission line; determining, at the first network node, whether the first network node has excess power based on a power available through the at least one first transmission line and on a power consumption of the first network node; if the first network node has excess power, delivering, by the first network node, at least part of the excess power of the first network node to at least one second network node of the plurality of network nodes through an interconnection between the first network node and the second network node, wherein: the at least one first transmission line comprises at least one subscriber line (140, 240) connecting the first network node to at least one respective subscriber device (102-1,...102-6) configured to inject power over the at least one subscriber line, and/or the at least one first transmission line comprises at least one uplink line connecting the first network node to an upstream node configured to inject power over the at least one uplink line; and: the first network node and the at least one second network node monitoring their own power status and exchanging information about their respective own power status with each other, and/or the first network node and the at least one second network node detecting power status of each other. the first network node and the at least one second network node monitoring their own power status and exchanging information about their respective own power status with each other, and/or the first network node and the at least one second network node detecting power status of each other.