Abstract: The present invention provides a wireless LAN system 22 that causes a client 40 to display information of a local unit.

Abstract: To provide a technique for analyzing radio wave condition affording improved accuracy of discrimination of radio wave propagation condition on a per-channel basis.

Abstract: The system of the present invention enables a user moving with a terminal to utilize multiple access points located at mutually separate spots and thereby efficiently acquire a desired Web content. The user of a terminal 50 or 60 moves from one free spot (first communication area AR1) to another free spot (second communication area AR2). Prior to the movement, the user of the terminal 50 or 60 gains off-line access to an access point 20 in the first communication area AR1 and reserves acquisition of a desired Web content. The access point 20 accepts the reservation and transmits reservation information to another access point 120 in the second communication area AR2. The access point 120 gains on-line access to a Web server based on the received reservation information and acquires the reserved Web content. After the move, the user of the terminal 50 or 60 gains off-line access to the access point 120 and picks up the desired Web content.

Abstract: To expand the call area for wireless IP phones without imposing significant economic costs on IP telephony service providers.

Abstract: The access point of the present invention saves power consumption and attains size reduction of a mobile device that receives information. A radio base station 10a provides a connecting point for connecting a plurality of clients with the Internet 60, and stores announcement information, which is recognizable by a user terminal 20a. The user terminal 20a transmits information to and from an outlet terminal 25 by radio wave. The radio base station 10a detects the position of the user terminal 20a and the position of the outlet terminal 25, based on the receiving status of the radio wave from the user terminal 20a and the outlet terminal 25. The radio base station 10a provides the user terminal 20a with the stored announcement information when the user terminal 20a comes close to the outlet terminal 25 to be within a preset distance from the outlet terminal 25.

Abstract: To provide access authentication technology that affords improved stability of an access point system with regard to access authentication of terminal devices.

Abstract: In an encryption key setting system of the present invention, in response to an operation of a registration button 127, an access point 20 restricts the coverage of radio wave transmitted from the access point 20 from a general radio communication area AR1 to a narrower security communication area MR1. The access point 20 subsequently delivers a WEP key to a terminal 50, confirms the successful delivery, and registers a MAC address of the terminal 50. The terminal 50 sets the delivered WEP key in itself. This arrangement desirably allows for new enrollment of a terminal for a wireless LAN by a simple method, while effectively preventing leakage of data representing an encryption key.

Abstract: The IP telephony system of the present invention attains addition of advertisement information to an IP telephone set without any specific server for processing all communication information. A wireless LAN base station 10a provides an access point used for connecting a radio IP telephone set 20a to the Internet 30. An announcement information storage module 150 stores advertisement data, which is reproducible by the radio IP telephone set 20a. The IP telephony system utilizes a protocol provided by the Internet 30 and attains communication of audio information between the radio IP telephone set 20a and another device connected thereto via the Internet 30. At a preset timing in the course of communication of the audio information, the advertisement data stored in the announcement information storage module 150 is transmitted to the radio IP telephone set 20a.

Abstract: The present invention provides a LAN device 20 having an internal function of controlling communication.

Abstract: An antenna device for wireless LAN of the present invention includes a base module and an antenna case that receives a built-in antenna therein. A metal reflector plate is held in a base element of the base module. The reflector plate functions to widen the range of directivity of the antenna device and thus ensures stable communication for wireless LAN. The antenna case is pivotable to the base module. The antenna is adjustable to a desired angle according to the requirement, so as to attain communication for wireless LAN.

Abstract: An antenna device for wireless LAN of the present invention includes a base module and an antenna case that receives a built-in antenna therein. A metal reflector plate is held in a base element of the base module. The reflector plate functions to widen the range of directivity of the antenna device and thus ensures stable communication for wireless LAN. The antenna case is pivotable to the base module. The antenna is adjustable to a desired angle according to the requirement, so as to attain communication for wireless LAN.

Abstract: A socket for an integrated circuit which is used for attaching the integrated circuit to a socket mounted on a primary wiring board with an intermediate wiring board interposed therebetween, an adapter for an integrated circuit utilizing the integrated circuit socket, and an integrated circuit assembly utilizing the integrated circuit adapter. The integrated circuit socket includes: a housing to be directly fitted with the integrated circuit; a long insertion pin which is to be inserted through the intermediate wiring board and to be fitted in the socket of the primary wiring board; a short insertion pin which is to be inserted through the intermediate wiring board but not to reach the socket of the primary wiring board; and a surface-mount pin which is to be connected to a surface of the intermediate wiring board opposed to the housing; the long insertion pin, the short insertion pin and the surface-mount pin being implanted in the housing.

Abstract: The electronic computer device according to the present invention comprises an alternative CPU 22 which operates in place of a low-speed CPU on the mother board when it is connected to such as a connector on the mother board of a computer. The electronic computer device 20 is provided with an address bus on its PCB 24, of which bus width is larger than that of the address bus on the mother board 50, and the dual in-line memory modules inserted in the expansion slots 40 connected to the such address bus provides an address space larger than 16 Mbytes. The alternative CPU 22 which can utilize this large address space can perform processing beyond the limitation of the bus width of the address bus on the side of the mother board 50. The DMA transfer to an address area which is not supported by the DMA controller on the side of the mother board 50 can be realized simply by performing the DMA transfer once to the address area of lower significance.

Abstract: The graphic board can be mounted inside the expansion slot of the computer, and the frequencies of the horizontal synchronizing signal and the vertical synchronizing signal can be preset finely through presetting the values on the registers from the computer side.At the start of display, the display is carried out in synchronizing frequencies corresponding to the original 640 dots by 400 lines display of the CRT display device (step S100) Then, the synchronizing frequencies are increased gradually to the target values corresponding to the 640 dots by 480 lines display (steps S120 through S140). During this time, the CRT display device will continue synchronization against fluctuation of the frequency within an allowable range with the operation of an internal synchronization circuit. Consequently, the CRT display device can maintain synchronization all through to the target values, and thus a 640 dots by 480 lines display is available.

Abstract: The present invention provides an accelerator working in place of a CPU on a motherboard to speed up the processing. The accelerator can realize the high-speed processing even when a clock on the accelerator is not an integral multiple of a clock on the CPU. When a clock frequency of a clock signal CLK on the motherboard is equal to 20 MHz and a maximum frequency of a CPU (3) on an accelerator (100) is equal to 33 MHz, for example, the CPU (3) does not work properly by a doubled clock signal. In such a case, a clock multiplication circuit (3a) multiplies the clock signal CLK by 1.5 times to generate a clock signal CLK15. There are three different patterns in the relationship between the timing of access of the CPU 3 and the timing of access of the motherboard. The accelerator of the invention determines the appropriate timing in each case and allows the access of the CPU 3 to be synchronous with the access of the motherboard.

Abstract: The present invention provides a data transfer unit interposed between a computer and a peripheral device for executing data exchange by a handshaking process based on a signal level. The invention also provides a method of supplying power to the data transfer unit. The data transfer unit includes a first power circuit and a second power circuit. The first power circuit receives an electric current via a diode D6 connected in a forward direction to a signal line RTS used for handshaking and generates a predetermined positive voltage of +12 volts. The second power circuit receives an electric current via a diode D1 connected in a reverse direction to the signal line RTS used for handshaking and generates the predetermined positive voltage of +12 volts. An auxiliary power of -12 volts is supplied from a data output signal line TXD in a printer.