Kabushiki Kaisha Toshiba

Keiichi Obara

Hiroshi Kobayashi

Toshikazu Kodama

Kazuo Nogami

Tamiya Ochiai

Hidekazu Tsuruta

Tomoo Kunikyo

Yutaka Seki

Tomoo Kunikyou

Hidekazu Turuta

Hirotaka Sakajiri

An information communication system in which a switch constituting section (,) housing a data generating source is connected to a center switch constituting section (,) through a communication channel (,) using an ATM technology as if the function of an ATM switch of distributed arrangement type was realized. This information communication system flexibly handles new kinds of information provided with the progress of times, and, even when a fault occurs, properly copes with the fault.

Communication system

Voice signal transmitting method and exchange system using this

A broadband switching network for transmitting information by using a cell composed of an information field and a header, including a first network comprising an ATM ring having a plurality of access nodes for multiplexing and demultiplexing the cell and a ring shape transmission path for connecting the plurality of access nodes in a ring shape so as to transmit the cell, and at least one second network, wherein the first network being connected to at least one second network via one of the plurality of access nodes, each second network having a switching function for switching the cell.

Broadband switching networks

An ATM exchange system capable of accommodation not only terminals of an ATM system but also terminals of an STM system at low cost. The ATM system includes an ATM channel switch for providing a direct exchange connection between the ATM terminal and an ATM trunk line, an STM channel switch for providing a direct exchange connection between the STM terminal and an STM trunk line, and an STM/ATM conversion module connected between the ATM channel switch and the STM channel switch and adapted to convert a call of one system to that of another system when a call is made between ATM terminal/line and STM terminal/line.

ATM exchange system

A multiplex communication system includes a plurality of exchanges and multiplex communication apparatuses connected to at least one exchange through a plurality of lines. Each of the multiplex communication apparatuses comprises first registers for storing first selection number information from the lines and second registers for fetching and storing second selection number information from an associated one of the exchanges, and is arranged such that a CPU of the associated communication apparatus determines that the exchange is to perform its interrupting operation and causes encoders and decoders to be switched to their through mode when the first selection number information stored in the first registers coincides with the second selection number information stored in the second registers.

Multiplex communication system

A communication system which includes two digital terminal stations connected to each other by a digital communication line. The communication system includes data terminals adapted for operation on an analog communication line which transmits main data and control data. The data terminal has two modems for transmitting respective data. Correspondingly, the digital terminal station has two modems which modulate and demodulate the respective data signal for transmitting the data from the digital communication line through the analog communication line and vice versa. The data transmission between two data terminals through the digital terminal stations is completed in one transmission call.

Growing community of inventors

Hachioji, Japan

Keiichi Obara