Hitachi, Ltd.

Toshimitsu Hayashi

Takeshi Ishizaki

Yoshiyuki Nakayama

Masami Kameda

Kenjiro Mori

Minoru Koizumi

Chiho Kitahara

Tomomi Suzuki

Shigeaki Kinoshita

Yoshinobu Tanigawa

Hideki Nakamura

Yuji Ogata

Hiroshi Kanai

Jun Maeoka

Nobuyuki Muranaka

Motoaki Satoyama

Keiko Tanigawa

Koji Tsukada

Shinichiro Kawasaki

Toru Hoshi

Toru Nagura

Yosuke Saso

After an IP address of a concentrator is changed by a management server (management platform), a server and the concentrator acquire the changed IP address of the concentrator at each communication, and changes encryption settings so that a set encryption key will be associated with the changed IP address.

Communication system, management server, server, concentrator, and encryption setting method

An information processing terminal includes a calculation processing unit, a telephone communication processing unit for performing a telephone communication with respect to another appliance, a communication processing unit for performing a communication operation with respect to the another appliance, and a signature calculating unit in which when a telephone communication with respect to the above-described another appliance is carried out, a signature using a secret key is produced by the calculation processing unit, and the signature calculating unit produces information attached with signature to which the produced signature has been attached. In the information processing terminal, the telephone communication processing unit transmits the information attached with signature to the another appliance corresponding to a telephone calling destination. It then becomes possible to notify that a telephone communication counter party is a justified user of an appliance before the telephone communication is commenced.

Telephone having authentication function and telephone system

An audio gateway is provided for receiving an internet relay request and a number called in a call from a telephone via the internet. An audio data gateway is selected using the number called, and relay operations are performed with the selected destination audio data gateway. The relay audio data is multiplexed for streams based on multiple relay requests having the same relay destination so that the relay audio data in these streams are multiplexed into a single relay stream.

Data gateway and method for relaying data

In a conferencing system comprising telephones and workstations to assist a cooperative work, a conference display control method for a visual user interface is provided. A conference window is displayed on a workstation display during execution of a teleconference. The conference window includes a meeting table area as a shared space and a local area which cannot be seen by the other participants. Document objects corresponding to a document application program which is used in the conference are arranged on those areas. The distribution of the documents, reference of information, and execution of the application program can be executed by direct manipulation of objects using a mouse. In the conference window, the document object can be operated at both the cooperative work place and the local work place. The operations during the conference can be simplified. Further, the conference window is displayed on the workstation display during the teleconference execution, the conference documents are sharingly executed by an OHP object on the conference window, and the documents during the shared execution are displayed in an OHP area, so that the kind of document which is being executed can be grasped.

Conference display control method and apparatus for an electronic

A shared window of the same content is displayed on each display device of a plurality of computers connected through a communication network for use in a collaborative work and objects are displayed on the window. Each object is displayed based on object management data having a plurality of types of attributes set therein and the shared windows on which the objects are displayed are limited by the attribute values of the attributes. Further, participants of the collaborative work who are permitted to erase the objects are limited by the settings of the attribute values of the attributes.

Collaborative work support system

An object of the present invention is to offer a communication network system in which it is possible to connect a logical channel for performing information exchange or information communication between terminals connected to the communication network without inputting an address of a terminal to communicate with. In the communication network according to the present invention in which a logical channel is connected between desired terminals connected to the communication network to perform information exchange or information communication between the desired terminals, a connection controller for a network and communication is provided which specifies a terminal which can be used by a person to communicate with through the communication network by inputting information excluding the address of the terminal to which a connection request is issued to connect the logical channel to the specified terminal.

Communication network system in which an unregistered terminal being

A joint work support system includes a plurality of terminals mutually connected to one another through a network. Each terminal includes a first data communication means and an operation means. The operation means performs operations to support joint work in both a joint work state, when the terminal is connected to another terminal through the network, and a local state, when the terminal is not connected to another terminal through the network. To operate in the local state, each of the terminals includes recording data creating means, second data communication means and reproduction means.

Computer-based conferencing system with local operation function

In a conferencing system comprising telephones and workstations, a conference display control method for a visual user interface is provided. A conference window is displayed on a workstation display during a teleconference and includes a meeting table area as a shared space and a local area which cannot be seen by the other participants. Document objects corresponding to a document application program which is used in the conference are arranged on those areas. The distribution of the documents, reference of information, and execution of the application program can be executed by direct manipulation of objects using a mouse. In the conference window, the document object can be operated at both the cooperative work place and the local work place. Further, the conference window is displayed on the workstation display during the teleconference execution, the conference documents are sharingly executed by an OHP (overhead projector) object on the conference window, and the documents during the shared execution are displayed in an OHP area, so that the kind of document which is being executed can be grasped. Moreover, when a participant participates in a plurality of teleconferences on a communication network by one teleconference terminal, one teleconference can be recognized as a specific conference space, so that the user can selectively use a plurality of teleconferences without confusing them.

Growing community of inventors

Hadano, Japan

Toshimitsu Hayashi