Canon Kabushiki Kaisha

Murata Mfg. Co., Ltd.

Shunji Arai

Shoji Suzuki

Shigeru Hiroki

Yuichiro Tsutsui

Masashi Hamada

Mitsuhiro Watanabe

Shinji Tsuchida

Minoru Ogata

Akira Hashimoto

Michihiro Izumi

Naoto Kagaya

Shoichi Takashima

Kuniaki Ohtsuka

Yoshihiro Tanigawa

Akihiro Uchimi

Tatsuya Satoh

When a client server is permitted to be connected to a network through a first access point based on authentication by an authentication server, the authentication server informs the first access point of an encipher key such as a WEP key used for encipher communication between the client device and the first access point. Then, when the client device is moved to a communicable range of a second access point, the authentication server creates no new encipher keys but informs the second access point of the encipher key used for the encipher communication with the first access point, whereby encipher communication is executed between the client device and the second access point by using the same encipher key as that used for the encipher communication with the first access point.

Communication system, server device, client device and method for controlling the same

In a radio communication system, during radio connection between a base stationand a terminalthe base stationtransmits a reception status notification request to the terminal. The terminalreceives the reception status notification request from the base station, then measures reception electric field intensity and error rate in the communication with the base stationand transmits these values as reception status information to the base station. The base stationstores the reception status information notified from the terminal, with linkage to a terminal number. When call origination to all the terminals has been completed, the base stationdisplays all the reception status information stored in a storage device, with linkage with terminal numbers, on an external display device.

Radio communication system and reception status display method

Data communicated on one wireless channel is converted and communicated via a wired line. Alternatively, data communicated on a plurality of wireless channels is bundled and communicated via a wired line using a number of channels smaller than that of the wireless channels. In a case where another wireless communication apparatus wishes to use a wireless communication channel when a plurality of wireless channels are being used for communication, some of the plurality of wireless channels are released, thereby making it possible for the other communication apparatus to perform communication even when communication is being carried out using the plurality of wireless channels. When communication by the other wireless communication apparatus subsequently ends, communication on the original number of wireless channels is resumed.

Wireless communication system having network controller and wireless communication device connected to digital communication line, and method of controlling said system

The position registration function of a cellular wireless communication apparatus is utilized to specify the position of the apparatus, notification of which is given to a communicating party. By additionally notifying the communicating party of identification information representing the wireless communication apparatus, the communicating party can use this information in judging whether or not to answer the call. Further, route traveled by the wireless communication apparatus is specified using the position registration function, and the transportation fare required for such travel is calculated.

Wireless communication system and method of controlling same

When a power failure occurs, a control unit,of a main apparatus,acquires the outside line,through an outside line I/F unit,and transmits a signal for requesting terminating transfer and a signal for designating a transfer destination to a public network,while receiving power from a backup power supply,M. After this terminating transfer is requested, and an incoming call to the telephone number of an outside line,is received, the public network,calls the transfer destination designated for terminating transfer. If the telephone number for calling a radio telephone set,from a public base station,is designated as this transfer destination, the public base station,calls the radio telephone set,in a terminating transfer operation.

Communication apparatus

A communication apparatus to which communication units for communicating in accordance with a multichannel access method are connected comprises a receiver to receive ID information of a communication channel to be used from the plurality of communication units, and a selector to select the communication channel in accordance with the ID information received by the receiver. Namely, the selector selects the communication channel other than the communication channel such as to exert an influence on a control channel or other communication channels if it is used together with the in-use communication channel. Or, now assuming that a frequency of the in-use communication channel is set to f.sub.A, the selector selects the communication channel other than the communication channel of a frequency f.sub.B such that (2f.sub.A -f.sub.B) or (2f.sub.B -f.sub.A) is equal to the frequency of the control channel or the frequency of the other communication channel.

Communication apparatus used for communicating in accordance with a

A radio communication apparatus which is charged by a charge table comprises a connection unit to connect another communication apparatus, a radio communication unit to communicate a communication signal of another communication apparatus through a radio line, and a control unit to finish or continue the communication by the radio communication unit in accordance with whether another communication apparatus has been connected to the connection unit or not when the apparatus is connected to the charge table.

Radio communication apparatus

In a call transfer apparatus wherein a request to transfer a call between first and second communication partners from the second communication partner to a transfer destination is made, a discriminating circuit discriminates whether the transfer destination can respond. A control unit places the first communication partner in a holding state while it is determined whether the transfer destination can respond. If the transfer destination can respond, the call is transferred. If speech communication with the transfer destination is not possible, the control unit releases the holding state of the first communication partner.

Control apparatus for switching station connections using a holding tone

A wireless channel selecting apparatus includes: a memory to store data indicating whether each of a plurality of wireless speech channels can be selected or not; and a selector to select the wireless speech channels to be used on the basis of the data stored in the memory. The number of times at which the wireless channels have been determined to be disabled is stored as data in the memory. The selection of the wireless speech channels which have been decided to be disabled is inhibited. The wireless speech channels other than the inhibited channels are selected as speech channels to be used. The inhibition of the channel selection is released after the elapse of a predetermined time from the inhibition.

Communication channel selection method

A telephone apparatus comprises a display unit to display use states of a plurality of external lines; a dial key including a ten-key; and a selector to select either one of the external lines in accordance with the operation of the dial key. LEDs of two colors may be used as a display unit.

Telephone apparatus with dial key display for external line status

A deflecting yoke for a television receiver comprises a parallel circuit of leakage magnetic field erasing or cancel coils connected in series with a parallel circuit of horizontal deflecting coils. The leakage magnetic field generated by the horizontal deflecting coils is cancelled by applying a magnetic field in an opposite magnetizing direction. The inductances of the cancel coils can be separately adjusted by adjusting the tap position of an adjusting variable tapped coil connected in series with the cancel coils.

Deflecting yoke for television receiver

A telephone apparatus includes an extension telephone for receiving data from a card, a timepiece unit, and a control unit for alarming a coincidence between time data included in the data received from the extension telephone and time data of the timepiece unit. The control unit performs a display on the basis of display data included in the data received by the extension telephone.

Telephone apparatus capable of setting card unit therein

A deflection yoke device is a device for deflecting an electron beam traveling inside a CRT, and a deflection yoke device which is driven by a particularly high frequency has horizontal deflection coils each wound into a saddle-type configuration. In the invention, each horizontal deflection coil is provided with an intermediate terminal, and a damping circuit is provided between the intermediate terminals or between each intermediate terminal and a high voltage-side terminal or a low voltage-side terminal. The damping circuit eliminates electrical oscillations occurring in the horizontal deflection coil.

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Yokohama, Japan

Shunji Arai