Abstract: Each of wireless interconnecting devices 4, 5, 6A, and 6B is structured to add a transfer AP list to a packet when transferring the packet while judging, when a packet is received, whether or not the received packet is a packet previously transferred by the wireless interconnecting device based on the judgment whether or not its own MAC address exists in a transfer AP list included in the received packet, and in a case its own MAC address does not exist in the transfer AP list, to transfer the received packet, when it is a kind of packet which needs to be transferred, with its own MAC address added to the transfer AP list so that endless transfer of the packet is prevented.

Abstract: Fixed stations 1 to 3 are each constituted by including a wired LAN control section 13, a central control section 14, a wireless LAN control section 15, and a storage section 16. Each of the fixed stations 1 to 3 is actuated in order, and whether it is a master fixed station or a slave fixed station is determined by the central control section 14, and data of static MAC address tables are exchanged to each other between the master fixed station and the slave fixed stations with the master fixed station as a center, whereby all the fixed stations 1 to 3 have the static MAC address tables of the same content, thus achieving the sharing of MAC addresses.