Abstract: In a subscriber apparatus and a subscriber line concentrator used for an Internet connection service or the like, the subscriber line concentrator comprises a communication control unit multiplexing/demultiplexing packets from a subscriber I/F and a network connection I/F, the network I/F converting the formats of packets from the communication control unit and the network, a transmitting/receiving unit being able to transmit recorded usage period information data to a communication managing apparatus, and a recording unit recording the usage period information data relating to a connection history between the subscriber apparatus lent from a communication carrier and the network, which prevents communication for grasping the state of usage of the subscriber apparatus from suppressing the communication bandwidth used to provide the network service to the subscriber, and carry out an efficient packet processing in an access line in the network.

Abstract: An ATM network system which connects a source terminal equipment to a destination terminal equipment by an SVC through a plurality of ATM communication nodes. In the source ATM communication node, a priority level definition table is preset with priority levels for the SVC whose service category is the UBR service per a physical port, MAC address, or IP address, a control unit transmits a SETUP message including the priority levels, a switch controller controls a readout level of a user's information cell based on the priority levels. In each of the ATM communication nodes having received the SETUP message, the switch controller controls a readout level of the user's information cell based on the priority levels included in the SETUP message.