A method for provisioning a new broadband communication service, and comprising: - inserting an access node adapted to operate the new broadband communication service along a subscriber loop; - configuring a switch of the access node in a first initial switching state s1, wherein a first pair of terminals coupled to a legacy subscriber device (40; 50) via a terminal segment of the subscriber loop is connected to a second pair of terminals coupled to a legacy network equipment (10; 20) via a further segment of the subscriber loop; - operating at least one legacy communication service over the subscriber loop while the switch is in the first switching state; - connecting a power sourcing equipment adapted to inject a power feeding signal for reverse power feeding of the access node and a new subscriber device adapted to operate the new broadband communication service to the terminal segment of the subscriber loop, wherein the method is characterized in that it comprises: - by the power sourcing equipment, transmitting a sequence of successive command signals over the terminal segment of the subscriber loop prior to the insertion of the power feeding signal; - by the access node, accumulating an electrical charge from at least one command signal of the sequence of successive command signals; - by the access node and by means of the so accumulated electrical charge, detecting a valid command signal in the sequence of successive command signals, and thereupon configuring the switch in a second switching state, s2, wherein the first pair of terminals is connected to a third pair of terminals coupled to a transceiver adapted to operate the new broadband communication service and to a power supply unit adapted to supply power to the access node from the power feeding signal; - by the power sourcing equipment, injecting the power feeding signal over the terminal segment of the subscriber loop for reverse power feeding of the access node; and - operating the new broadband communication service over the terminal segment of the subscriber loop. - inserting an access node adapted to operate the new broadband communication service along a subscriber loop; - configuring a switch of the access node in a first initial switching state s1, wherein a first pair of terminals coupled to a legacy subscriber device (40; 50) via a terminal segment of the subscriber loop is connected to a second pair of terminals coupled to a legacy network equipment (10; 20) via a further segment of the subscriber loop; - operating at least one legacy communication service over the subscriber loop while the switch is in the first switching state; - connecting a power sourcing equipment adapted to inject a power feeding signal for reverse power feeding of the access node and a new subscriber device adapted to operate the new broadband communication service to the terminal segment of the subscriber loop, wherein the method is characterized in that it comprises: - by the power sourcing equipment, transmitting a sequence of successive command signals over the terminal segment of the subscriber loop prior to the insertion of the power feeding signal; - by the access node, accumulating an electrical charge from at least one command signal of the sequence of successive command signals; - by the access node and by means of the so accumulated electrical charge, detecting a valid command signal in the sequence of successive command signals, and thereupon configuring the switch in a second switching state, s2, wherein the first pair of terminals is connected to a third pair of terminals coupled to a transceiver adapted to operate the new broadband communication service and to a power supply unit adapted to supply power to the access node from the power feeding signal; - by the power sourcing equipment, injecting the power feeding signal over the terminal segment of the subscriber loop for reverse power feeding of the access node; and - operating the new broadband communication service over the terminal segment of the subscriber loop. - by the power sourcing equipment, transmitting a sequence of successive command signals over the terminal segment of the subscriber loop prior to the insertion of the power feeding signal; - by the access node, accumulating an electrical charge from at least one command signal of the sequence of successive command signals; - by the access node and by means of the so accumulated electrical charge, detecting a valid command signal in the sequence of successive command signals, and thereupon configuring the switch in a second switching state, s2, wherein the first pair of terminals is connected to a third pair of terminals coupled to a transceiver adapted to operate the new broadband communication service and to a power supply unit adapted to supply power to the access node from the power feeding signal; - by the power sourcing equipment, injecting the power feeding signal over the terminal segment of the subscriber loop for reverse power feeding of the access node; and - operating the new broadband communication service over the terminal segment of the subscriber loop.