An interface to an integrated service, digital network (ISDN) line for up to two analog dual tone, multifrequency telephones and up to four personal computers or data terminals. A stored program-controlled processor controls access to the ISDN line for the analog and digital interface circuits. The processor also provides access to switch-controlled ISDN features for the analog telephones (e.g., call waiting, call hold, etc.).

Apparatus for interfacing analog telephones and digital data terminals to an isdn line

A computer connected to an ISDN switch via an ISDN digital subscriber line, has shared cell appearances with a number of telephone stations connected to the switch and on the basis of shared call appearance associated messages from the switch, controls the forwarding of calls directed to the stations with which it has a shared call appearance. The associated messages are interpreted by the computer, which generates station status information. The computer responds to messages associated with predefined ones of the stations to select an alternate destination for the call and to transmit ISDN messages to the switch to cause the call to be forwarded to the selected alternate destination. Calls may be forwarded depending on call type, called number or other criteria. The computer responds to calls forwarded to it in the event that an associated station is busy and connects a holding party to the principal phone when the principal phone is no longer busy. The computer may be connected simultaneously to several ISDN switches via ISDN subscriber lines to receive shared call appearance associated messages from the several switching systems and forward calls for a telephone station connected to one switch, to a telephone station connected to another switch. In order to handle voice message recording, an ISDN line shares the directory numbers of the analog lines connecting a switch to a message recording system. The ISDN line then receives all messages destined for the lines connected to the message switch. The ISDN line is connected to an interface for converting between ISDN messages and data messages for controlling the message recording system. Avdantageously, this permits an ISDN switch to provide an inexpensive interface to a voice message system.

Automated call handling apparatus

A portable intelligent shopping device which can be worn as a wristwatch or carried on a belt. It makes paying for purchases more secure. The device stores the wearer's private key and digital certificate. It can also store the public keys of various stores. When the wearer (shopper) buys something from a store, the store can request a payment of the appropriate amount from the wearer's watch. The authorization for payment of the amount specified by the request for payment may be transmitted using IR or RF. The watch can then display the amount and request the shopper to confirm the transaction by entering a PIN number by tapping on the touch screen or using the roller wheel. Once the correct PIN is entered, the watch can send a message to the store authorizing payment of the requested amount. The store can verify the message based on the shopper's encrypted certificate by decrypting it using the shopper's public key. The entire payment authorization signal can be encrypted by the shopper using the store's public key so that only the store can decrypt it with its private key.

Portable intelligent shopping device

A new data communication system is described which enables data transmission over existing telephone lines at rates higher than possible with existing methods, including conventional modems. By using a novel asymmetric configuration of the two communication endpoints, the currently-accepted maximum theoretical limits on the data rate are no longer applicable. One endpoint is connected directly to a digital telephone network, whereas the other endpoint uses a conventional telephone connection. This reduces the transmission problem to compensation for a single telephone line interface and a single analog local loop. Means of providing this compensation and the required clock synchronization were also created, enabling a practical implementation of the system. The new system can achieve rates up to 64,000 bits-per-second and has broad utility in several active areas including wide-band audio transmission, video transmission, networking, facsimile transmission, and remote computer access.

High speed communications system for analog subscriber connections

A technique is disclosed for use in conjunction with an ISDN communications system for permitting a host computer, that is executing a host session with a user and is connected through the system, to dynamically change an ISDN access path, that connects the user to the host computer and carries the host session therebetween, between a packet switched connection and a circuit switched connection during the occurrence of the session in order to provide the particular connection that is most suited to the communication requirements of a task currently being executed during the session by the host computer. Any such dynamic change of the ISDN access path is invoked by the host computer, does not disrupt the host session and is substantially transparent to the user.

Technique for dynamically changing an isdn connection during a host session

A packet switching system for achieving high-speed packet switching on data lines having the X.25 protocol of the C.C.I.T.T. It includes a plurality of data line apparatuses (DLC: 10, 11, and 1N), a call connection control information transfer bus commonly connected to the plurality of data line apparatuses (CB: 2), a specialized data transfer bus for data packets (DB: 4), a packet buffer state information transfer bus for transmitting and receiving call state information (SB: 6), and a call connection controlling processor connected to the call connection control information transfer bus (CP: 3). Each of the data line apparatuses has a receive packet storing circuit (DTRQ: 102) provided with a receive packet buffer of the first-in random out (FIRO) memory, and a transmit packet storing circuit (DTSQ: 105) provided with a transmit packet buffer of the FIRO memory.

Packet switching system.

An ISDN remote switching unit for accommodating analogue telephone subscriber lines and ISDN digital subscriber lines comprises at least one signal converter for each of the conventional analogue subscriber so that a line signal, an address signal and tone signal of each conventional analogue subscriber are converted into a signaling system of the ISDN digital subscribers line, and a traffic concentrator connected to the signal converter and disposed remote from a host exchange station, whereby the signaling system between the remote station and the host station is unified for both the analogue telephone subscriber and the ISDN digital subscriber.

ISDN remote switching unit for accommodating analog and digital lines

A visible light information providing device, a visible light information reader, a visible light information providing system, a visible light information providing method, a program thereof, and a computer-readable information storage medium for storing the program, enabling a user to recognize the area to which information is provided in a contactless manner. A visible light information providing device comprises a memory, an LED (Light Emitting Diode) for emitting visible light, a modulator circuit for modulating visible light emitted from the LED to transmit information stored in the memory, and a CPU (Central Processing Unit) for controlling the modulator circuit according to the type of information stored in the memory so that the LED emits a prescribed visible light pattern.

Device, system and method for providing visible light information, visible light information reader, program thereof, and computer-readable information storage medium for storing program

The present invention provides a logistic PKI service system that improves reliability and security of its distribution portion. An article displayed on a shop terminal is purchased from a user's mobile terminal via a network. Then, a shop terminal receives distribution label data from a PKI. The user's mobile terminal receives authentication information transmitted by the PKI. The shop terminal generates a distribution label on the basis of the distribution label data from the PKI. Then, the shop terminal attaches the distribution label to the article and then requests a distributor to deliver the article. After the distributor delivers the article to a user, the user's mobile terminal reads information from the distribution label attached to the article. The user's mobile terminal then carries out information on the basis of the information from the distribution label and the authentication information from the PKI.

Logistic pki service system, mobile terminal, logistic pki service method used for the same, and recording medium in which corresponding program is recorded

An integrated service network ("ISDN") is structured to connect subscriber lines through a packet switching system to incoming or outgoing packet switching calls without passing them through a circuit switching system. This effectively uses the speech path of the circuit switching section instead of using it for packet switching calls. At the same time, the invention minimizes the influence of the introduction of the ISDN upon the software of the circuit switching section. The ISDN digital switching network applies to circuit switching calls which are switched at a local switch and to packet switching calls which are to be switched at a toll switch. The digital switching system separates calls into circuit switching calls which are transferred through B channels, packet switching calls which are transferred through B channels, and packet switching calls which are transferred through D channels in order to connect the circuit switching calls to a time division switch and the packet switching calls to a packet multiplexer. The packets are concentrated and multiplexed into separated packet switching calls. The circuit switching calls from the time division switch are multiplexed with the packet switching calls from the packed multiplexer and are placed in predetermined time slots in accordance with a band width designated corresponding to respective call traffic.

Yoshinori Yoshida

Papers

Packet switching system.

ISDN remote switching unit for accommodating analog and digital lines

Device, system and method for providing visible light information, visible light information reader, program thereof, and computer-readable information storage medium for storing program

Logistic pki service system, mobile terminal, logistic pki service method used for the same, and recording medium in which corresponding program is recorded

Digital local switching system for integrated service digital network