Patent ID: 8331350

Claim:
An IP phone auto configuration system comprising: IP phones; a DHCP server for assigning IP addresses to the IP phones; an FTP server for storing at least one setting data file containing auto configuration setting information for the IP phones; and a network for connecting the IP phones, the DHCP server and the FTP server, wherein each of the IP phones: a acquires an address of the FTP server and a first file name of a setting data file corresponding to the IP phone from the DHCP server after being started, determines whether there is a difference between the first file name acquired from the DHCP server and a second file name having been retained in the IP phone, and acquires the setting data file from the FTP server when there is a difference between the first file name and the second file name, and conducting detailed setting in the IP phone automatically based on the setting data file, wherein: a range of IP addresses used by the DHCP server is divided into a range using a VLAN and a range that does not use the VLAN, and the setting data file stored in the FTP server contains information indicating whether or not to set a VLAN mode; after being started, each of the IP phones acquires IP addresses in the range that does not use the VLAN from the DHCP server as its own IP address and an address of the FTP server; and if the setting data file acquired from the FTP server contains information indicating to set the VLAN mode, the IP phone acquires IP addresses in the range that does not use the VLAN as its own IP address and an address of the FTP server again.