Abstract: The Ethernet converter 10 includes a LAN switch 130 as a wired communication unit for carrying out communication with wired network devices; an RF device 140 and an antenna 150 as a wireless communication unit for carrying out communication with wireless network devices; a wired device monitoring portion 102 for monitoring the operation state of the wired network devices via the LAN switch 130; and an RF device controller 106 for controlling the operation of the RF device 140 on the basis of the operating state of the wired network devices. If the result of monitoring by the wired device monitoring portion 102 is that the wired network devices are not operating, the RF device controller 106 stops the operation of the RF device 140 so that power consumption by the RF device 140 is less than when the wired network devices are operating.