Hitachi, Ltd.

Tadashi Tamaoki

Toru Aramaki

Toshimichi Noake

Tatsuki Inuzuka

Keisuke Nakashima

Yasuyuki Kojima

Shinichi Shinoda

Shogo Matsumoto

Hisashi Matsumoto

Atsuo Hatono

Yasunori Iwafuji

Toru Takei

Hiroshi Kawamura

Katsubumi Ouchi

Hideki Muroya

Eizou Ebisui

Hideo Nakazawa

Takeshi Kobayashi

Tomoe Sasayama

Naoki Kinoshita

Norikazu Takahashi

Shigeo Arai

Atuhiko Urusihara

Kenji Yokoi

Kyoichi Nomura

In an ATM network having a non-ATM apparatus such as a PBX, a band and various apparatuses are effectively used by employing SVC, so that a ring back tone, etc., is transmitted to the non-ATM apparatus of originating side. An ATM signaling apparatus comprises a signaling convert section for making conversion of signaling information between an ATM network and a PBX , and a cell assembly and disassembly section (CLAD) for cell assembling and disassembling user information. An ATM signaling interface section receives and transmits ATM signaling information from/to the ATM network , and sends a user VC connect and a release indication to the CLAD section . An non-ATM signaling interface section receives and transmits PBX signaling information from/to the PBX . User information and a user information cell sent from the PBX 230 and the ATM network is cell assembled and cell disassembled by the CLAD section

ATM communication apparatus and ATM signaling method

The present invention intends to realize highly reliable communications between a frame relay network and an ATM network by corresponding service classes decided in both networks to each other. In order to achieve the above object, the frame relay data communication apparatus of the present invention used to allow communications between the frame relay network and the ATM network is provided with a frame receiver unit for receiving frame data from the frame relay network; a cell assembly unit for assembling received frame data into ATM cells and transmitting assembled cells to the ATM network; and a controller for controlling both frame receiver unit and cell assembly unit so as to extract priority order information from received frame data and receive priority order information of data used in ATM networks from an ATM network and decide a service class of the received data to assemble the received frame data into cells according to the decided service class.

Method and apparatus for communications of frame relay data

A cell loss priority control method for an ATM switch in which degradation of the traffic characteristics of a high priority class or a low priority class is detected, a cell loss probability distribution in a buffer is estimated from the cell traffic characteristics, a buffer threshold value is obtained in accordance with the estimated cell loss probability distribution, and the cell is controlled by using the obtained buffer threshold value which maximizes total traffic throughput of both the high priority class and low priority class.

Cell loss priority control method for ATM switch and ATM switch

A facsimile apparatus has a transparent plate on which a document may be located. The document is then scanned by a scanner which includes electronic solid state light generation means e.g. LEDs which illuminate the document, with the light reflected from the document being detected by a detector. An electronic signal corresponding to an image of the document may then be transmitted to a remote location. Alternately, the facsimile apparatus may be used to copy the document. Cut paper sheets are withdrawn from storage and an image printed thereon by a heat transfer system in which a film of ink is selectively heated. Paper on which an image has been printed is then received on the upper surface of the storage. The facsimile apparatus may also have a document transporter for moving a document past the scanner with the scanner fixed.

Facsimile apparatus and method for processing a fixed document

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Kanagawa-ken, Japan

Tadashi Tamaoki