There is installed a special management node to efficiently perform network configuration management. An un-provisioned residential gateway that is associated with the subscriber is instructed to collect a subscriber numeric identity that uniquely identifies the subscriber and a Personal Identification Number information that are associated with the subscriber. The feedback path includes a phase rotator connected to the output of the VCO and to an input of a frequency divider. The identifier of the virtual port is associated with an address of a physical port.