Kabushiki Kaisha Toshiba

Terunori Suwa

Hiroshi Mano

Takashi Watanabe

Toshiaki Tanaka

Masayuki Tsurusaki

Isaku Komuro

Yoshihiro Kawauchi

Nobuhiro Masaki

Setsuo Kimura

Yoshihito Nagano

According to this invention, a digital key telephone system connected to an analog public network NW having a function of transmitting a ringing signal including identification information of a calling line through a subscriber line (CO line), accommodating a plurality of extension lines each connected to a digital key telephone (DKT) or a standard telephone (STT) as an extension terminal, and having a function of switching and connecting the subscriber line to the plurality of extension lines or the extension lines to each other includes a called party storage means storing, in advance, information representing the correlation between the calling line and the extension terminals and as a called terminal. When a ringing signal arrives from the analog communication network NW, calling line identification information (caller ID) contained in the ringing signal is detected by a calling line identification information interface unit (RCIU) A control unit (RCTU) determines the called extension terminal on the basis of the detected caller ID and the information stored in the storage means, so the extension terminal receives the call from the digital key telephone interface unit (RDKU) or a standard telephone interface unit (RSTU)

Digital key telephone system and extension terminal device thereof

According to this invention, a digital key telephone system connected to an analog public network NW having a function of transmitting a ringing signal including identification information of a calling line through a subscriber line (CO line), accommodating a plurality of extension lines each connected to a digital key telephone (DKT) or a standard telephone (STT) as an extension terminal, and having a function of switching and connecting the subscriber line to the plurality of extension lines or the extension lines to each other includes a called party storage means storing, in advance, information representing the correlation between the calling line and the extension terminals and as a called terminal. When a ringing signal arrives from the analog communication network NW, calling line identification information (caller ID) contained in the ringing signal is detected by a calling line identification information interface unit (RCIU) . A control unit (RCTU) determines the called extension terminal on the basis of the detected caller ID and the information stored in the storage means, so the extension terminal receives the call from the digital key telephone interface unit (RDKU) or a standard telephone interface unit (RSTU)

According to this invention, a digital key telephone system connected to an analog public network NW having a function of transmitting a ringing signal including identification information of a calling line through a subscriber line (CO line), accommodating a plurality of extension lines each connected to a digital key telephone (DKT),or a standard telephone (STT),as an extension terminal, and having a function of switching and connecting the subscriber line to the plurality of extension lines or the extension lines to each other includes a called party storage means storing, in advance, information representing the correlation between the calling line and the extension terminals,and,as a called terminal. When a ringing signal arrives from the analog communication network NW, calling line identification information (caller ID) contained in the ringing signal is detected by a calling line identification information interface unit (RCIU),. A control unit (RCTU),determines the called extension terminal on the basis of the detected caller ID and the information stored in the storage means, so the extension terminal receives the call from the digital key telephone interface unit (RDKU),or a standard telephone interface unit (RSTU)

Digital button telephone system and extension terminal for the same

A communication terminal connected to an analog telephone network and has a function for transmitting an incoming call signal with originator identification data inserted. Notification of an incoming call is stopped during a time period from the detection of a first ringing signal of the incoming call signal to the detection of the originator identification data. A user is notified of the presence of the incoming call is notified after the originator identification data is detected and notified to the user.

Communication terminal having function for displaying originator

A communication terminal connected to an analog telephone network and has a function for transmitting an incoming call signal with originator identification data inserted. Notification of an incoming call is stopped during a time period from the detection of a first ringing signal of the incoming call signal to the detection of the originator identification data. A user is notified of the presence of call after the originator identification data is detected and notified to the user.

Growing community of inventors

Tachikawa, Japan

Terunori Suwa