Abstract: There is provided a current sensor capable of performing malfunction determination with high accuracy even under the influence of an adscititious magnetic field. A current sensor includes first and second current sensor units, a computation unit, a storage unit, and a determination processing unit. The first current sensor unit measures a target current. The first and second current sensor units have almost the same sensitivity. The computation unit calculates and outputs an addition value and a difference value of outputs of the first and second current sensor units. In the storage unit, the addition and difference values output from the computation unit are stored. The determination processing unit determines whether a malfunction has occurred by using the addition and difference values stored in the storage unit. The determination processing unit determines that a malfunction has occurred, in a case where there is a correlation between the addition and difference values.

Abstract: There is provided a current sensor capable of performing malfunction determination with high accuracy even under the influence of an adscititious magnetic field. A current sensor includes first and second current sensor units, a computation unit, a storage unit, and a determination processing unit. The first current sensor unit measures a target current. The first and second current sensor units have almost the same sensitivity. The computation unit calculates and outputs an addition value and a difference value of outputs of the first and second current sensor units. In the storage unit, the addition and difference values output from the computation unit are stored. The determination processing unit determines whether a malfunction has occurred by using the addition and difference values stored in the storage unit. The determination processing unit determines that a malfunction has occurred, in a case where there is a correlation between the addition and difference values.

Abstract: A system and method are provided for authentication. A first request for a transaction is received from a communications device, the first request comprising collation information of a customer to be authenticated and a price of a product or service to be purchased by the customer. An authentication level is set based on the price. A second request is transmitted to a mobile communications device of the customer. Authentication information is received from the mobile communications device, the authentication information comprising identification information of the customer. The authentication information is transmitted to the communications device.

Abstract: A system and method are provided for authentication. A first request for a transaction is received from a communications device, the first request comprising collation information of a customer to be authenticated and a price of a product or service to be purchased by the customer. An authentication level is set based on the price. A second request is transmitted to a mobile communications device of the customer. Authentication information is received from the mobile communications device, the authentication information comprising identification information of the customer. The authentication information is transmitted to the communications device.

Abstract: The object of the present invention is to provide an authentication system capable of achieving suitable authentication processing while guaranteeing the maximum convenience for the customer. A first communication terminal PD1 is built into a television TV that can be connected to the Internet, and communications with an authentication control company BS are possible via the first communication terminal PD1. The authentication control company BS is, for example, a telecommunications company, and performs authentication control for a plurality of product supplier companies SP1 to SP3 according to the product purchase status on the television TV. Furthermore, the present invention simplifies the appropriate procedures by setting authentication levels for authentication control.

Abstract: A money receiving system receives monetary payments without using cash or placing restrictions on recipients of such payments. This system uses an authentication management apparatus and a store communication terminal. The authentication management apparatus includes a receiver for receiving customer ID information, store ID information, and monetary amount information from a store communication terminal, an authentication device for authenticating the customer ID and the store ID, and a transfer device for transferring money indicated by the monetary amount from an account of a store to an account of a customer. The store communication terminal includes a memory for storing store information, a receiver for receiving customer information, an input device for inputting a monetary amount that a store is to pay a customer, and a transmitter for transmitting the store ID, the customer ID, and the monetary amount to an authentication management apparatus.

Abstract: For transmitting transmission data generated by a transmission data generator of a communication terminal device, a packet unit determining unit [17] determines a packet unit for a lowest data communication rate for the transmission of the transmission data, among packet units (packet sizes) that can be recognized by a destination communication terminal device and that can be transmitted from the communication terminal device. A packet generator [18] packetizes the transmission data according to the packet unit determined by the packet unit determining unit [17], and transmits the packetized transmission data to the destination communication terminal device.

Abstract: A slave communication device in a wireless LAN system uses a single wireless channel. When a telephone apparatus outside the network originates a call to the LAN, the originated call first terminates at a master communication device. A wireless telephone communication can then be established between that telephone apparatus and the slave communication device without relaying through the master communication device, and without requiring particular processing, such as authentication on a host station side. A first state is when a transmission/reception device of the master communication device is turned on and transmission/reception devices of slave communication devices are turned off. A second state is when the transmission/reception device of the master communication device is turned off and only the transmission/reception device of one of the slave communication devices which is a subject of control delegation is turned on.

Abstract: A wireless LAN system uses a single wireless telephone line. When a telephone apparatus outside the network originates a call to the LAN, the system allows establishment of wireless telephone communication between that telephone apparatus and a slave communication device. Each transmission/reception device is controlled to switch between a first state in normal times in which a transmission/reception device of a master communication device is turned on and transmission/reception device of respective slave communication devices are turned off and a second state in which the transmission/reception device of the master communication device is turned off and only the transmission/reception device of any one of the slave communication devices is turned on.

Abstract: For transmitting transmission data generated by a transmission data generator of a communication terminal device, a packet unit determining unit determines a packet unit for a lowest data communication rate for the transmission of the transmission data, among packet units (packet sizes) that can be recognized by a destination communication terminal device and that can be transmitted from the communication terminal device. A packet generator packetizes the transmission data according to the packet unit determined by the packet unit determining unit, and transmits the packetized transmission data to the destination communication terminal device.

Abstract: A wireless LAN system uses a single wireless telephone line. When a telephone apparatus outside the network originates a call to the LAN, the system allows establishment of wireless telephone communication between that telephone apparatus and a slave communication device. Each transmission/reception device is controlled to switch between a first state in normal times in which a transmission/reception device of a master communication device is turned on and transmission/reception device of respective slave communication devices are turned off and a second state in which the transmission/reception device of the master communication device is turned off and only the transmission/reception device of any one of the slave communication devices is turned on.

Abstract: For transmitting transmission data generated by a transmission data generator of a communication terminal device, a packet unit determining unit determines a packet unit for a lowest data communication rate for the transmission of the transmission data, among packet units (packet sizes) that can be recognized by a destination communication terminal device and that can be transmitted from the communication terminal device. A packet generator packetizes the transmission data according to the packet unit determined by the packet unit determining unit, and transmits the packetized transmission data to the destination communication terminal device.

Abstract: The present invention provides a configuration, a control method, a control program and the like for a master communication device for use in a wireless LAN system which allows each slave communication device to perform originating to a telephone apparatus outside a network by itself through a host station without relaying through the master communication device while a single wireless telephone line is used, and does not require particular processing such as authentication on the host station side.

Abstract: A system for improving the level of service to the user, and billing according to user intentions while making effective use of telephone lines. The system includes a host computer (3) that controls communication services provided by telecommunications carriers, a base terminal (1) having base ID information which the host computer can identify, and a plurality of remote terminals (2A-2n.) having remote terminal ID information which the host computer can identify, to which control is transferred from the base terminal, and which communicate with the host computer.

Abstract: The present invention relates to a slave communication device which received control delegation from a master communication device and performs communication with an originating telephone apparatus through a host station based on a call originated from that originating telephone apparatus, and has a master communication device 1 having a unique master ID set therefor for using a wireless telephone line provided by a host station 3 and one or more slave communication devices 2 receiving control delegation from the master communication device 1 to perform communication using the wireless telephone line for the master communication device 1.

Abstract: It is an object of the present invention to provide a communication system, which can manage the contents of control transfer properly while adopting a control transfer method capable of making effective use of a telephone line. When use of a telephone line for a portable telephone 1 is transferred to slave terminals such as a portable telephone 10, a vending machine 11 with communication capability, a personal computer 12 with communication capability, and a car 13 with communication capability, the contents of transfer are stored in a predetermined memory of the portable telephone 1, while the contents of transfer to be transferred to each slave terminal are stored in a built-in memory of the slave terminal. On the other hand, a host computer 2 at an exchange is provided with a predetermined memory for cumulatively storing used transfer contents each time the slave terminal is connected using the transfer. The three memories are checked as appropriate to keep proper use of control transfer.

Abstract: The object is to provide an optical communication system that can improve the line status of mobile communications while making good use of existing communication infrastructures.

Abstract: A response system (for example, user support system) in which a response service system (for example, a user support service system) is facilitated by incorporating a telecommuting responder so as to solve the conventional problem that it has been difficult to secure a responder on the premises. A communication control device (1), upon receiving a call of a request for support about a specific product from a videophone (12) on the user side, calls at a time a videophone (26) of a responder on the premises capable of supporting the user about the specific product and a videophone (22) of a telecommuting responder also capable of supporting the user about the product and connects the one who first responds to the videophone (12) on the user side. As a result, a user support system capable of incorporating a telecommuting responder who may be out of his or her home can be built.

Abstract: The present invention provides a basic configuration, a control method, a control program and the like for a slave communication device for use in a wireless LAN system which allows each slave communication device to perform wireless telephone communication by itself through a host station without relaying through a master communication device while a single wireless telephone line is used, and does not require particular processing such as authentication on the host station side.

Abstract: The present invention relates to a slave communication device in a wireless LAN system which allows each slave communication device to perform originating to a telephone apparatus outside a network by itself through a host station without relaying through a master communication device while a single wireless telephone line is used, and does not require particular processing such as authentication on the host station side.