Abstract: When incorporating a print server (20) in a wireless LAN (1), an attached communication environment setting program is installed in a client terminal (10) and executed. Thereby, an advertisement packet is generated and broadcasted in the wireless LAN (1). In the print server (20), a program preinstalled therein continues attempt of changing channels and modes one by one until the advertisement packet is correctly received, and sets the channel and the communication mode used for the reception as the setting items of the communication environment. Thus, only by installing and executing the communication environment setting program in the client terminal (10), the communication mode and the channel can be set with ease.

Abstract: When incorporating a print server (20) in a LAN (1), an attached communication environment setting program is installed in a client terminal (10) and executed. Thereby, an address-search packet is generated and broadcasted within the LAN (1). In the server (20), a previously stored program generates a response packet containing the own IP address, and broadcasts the response packet. In the client terminal (10), upon receiving the response packet, communication environment is set up based on the IP address contained in the response packet. Thus, only by installing the communication environment setting program in the client terminal (10) and executing the same, the communication environment between the client terminal (10) and the print server (20) can be readily and automatically set up.