To provide an IP telephone system whose usability is improved so that a number of pieces of information can be displayed to users.
The IP telephone sets 11 to 1n and a PC terminal are incorporated and thereby the IP telephone system server 3 can find two IP addresses, an IP address corresponding to a telephone number of the IP telephone set, and an IP address of an incorporated PC terminal. Accordingly, the same SIP message as an SIP message transmitted from the IP telephone system server 3 to the IP telephone set becomes possible to be transmitted also to the PC terminal. Consequently, the PC terminal can obtain the same pieces of information as those displayed on the IP telephone sets, and further a display unit of the PC terminal can be utilized as an external display unit of the IP telephone set. As a result, many more pieces of information than those on the IP telephone sets can be displayed on the PC display, thus permitting user-friendliness to be improved.
COPYRIGHT: (C)2008,JPO&INPIT
OSAKI YOSHIAKI
SAKAI SHIZUMARO
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto