This manual provides instructions for setting up and using communication functions on FANUC CNC such as the Series 30i/31i/32i/35i. It includes specifications for the embedded Ethernet and optional board, as well as software and hardware options. The document covers data server functions, FOCAS2/Ethernet functions, DNS/DHCP client functions, machine remote diagnosis functions, unsolicited messaging functions, and FTP file transfer functions. It provides details on setting up and operating each of these functions, as well as related NC parameters and examples of common configurations. Safety precautions are also outlined.