Fujitsu Corporation

Toshihiro Ishida

Osamu Sekihata

Toshimitsu Ohba

Kazumasa Kuroshita

A network address supply system includes terminal equipments, a server, and a switching HUB to which the terminal equipments and the server are connected via communication lines. Each terminal equipment includes an address supply requesting unit. The switching HUB includes interfaces, a first line data storing unit, and a communication line control unit that when one of the interfaces receives an address supply request broadcast packet from one of the terminal equipments, transmits the address supply request broadcast packet to only an interface corresponding to the interface information stored in the first line data storing unit. The server includes a network address storing unit and an address supplying unit that when receiving the address supply request broadcast packet, broadcasts an address broadcast packet containing an unused network address stored in the network address storing unit as a response packet to the address supply request broadcast packet.

Network address supply system for transmitting an address supply request to only a server

In the case where calls made by a calling part of a first LAN connecting device are rejected by a call receiving part of a second LAN connecting device, non setting of the number of channels needed for data transmission will be detected by a channel shortage detecting block of the first LAN connecting device. In this case, an information requesting block will make a request for information of channel availability at the time of channel releasing to the second LAN connecting device. This request will be registered in the information request registering block of the second LAN connecting device. When availability of the channels accommodated in an interface is detected by the channel monitoring block of the second LAN connecting device, an information sending block will transmit channel availability information to the first LAN connecting device in accordance with the request registered in the information request registering block.

LAN connecting device and LAN connecting system

A bus load distributing method suitable for data communications equipment and a bus switching control device for data communications equipment. The data communication equipment includes plural buses, a bus connecting unit for interconnecting the plural buses, and a control unit for connecting physically and selectively each module to one among the plural buses. The control unit connects plural modules to a bus to recognize, distribute and reduce the load on the bus. The control device also switches a bus to be connected in accordance with the traffic of each module to optimize the bus load.

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Kawasaki, Japan

Toshihiro Ishida