Mitsubishi Kasei Corporation

Oki Electric Industry Co., Ltd.

Diafoil Hoechst Company, Limited

Kenichi Uchino

Hidemi Yoshida

Shuichi Maeda

Yutaka Kurose

Toshifumi Kawano

Koichi Kihara

Michiyo Kimura

Toshio Kaneko

Shizue Inaba

Yorihisa Takeuchi

Jiro Asoh

A bridge device for connecting networks together via data link layers, that assigns input port numbers unique to each port, to headers of input memory access control packets. A content-addressable memory stores destination addresses and groups of port numbers corresponding to the destination addresses. A determiner such as a controller determines whether or not a destination address of a memory access control packet is stored in the memory and determines whether or not a port number corresponding to the destination address coincides with an input port number of the memory access control packet. Based on the determinations made by the determiner, a selector selects one of the following as an output port number: either a port number corresponding to the destination address, or a port number designating all ports other than the input port, or a port number not designating any ports. An output port number assigner assigns an output port number to a memory access control port. Output filters such as gate circuits sequentially receive memory access control packets output by the assigner, and determine whether or not the output port numbers assigned to the headers of the packets are numbers of the ports to which the filters are themselves connected and allow passage of only those packets with the self-designating output port numbers, which are therefore actually addressed to their own output port.

Network bridge using only hardware to process media access control (MAC)

An optical tape comprising a substrate having a center line average roughness (Ra.sup.A) on one side of 0.005 to 0.5 .mu.m and a tensile strength (F.sub.5) in the longitudinal direction of not less than 8 kg/mm.sup.2, and an optical recording layer formed on the other side of said substrate.

Optical tape

A magneto-optical recording medium capable of overwriting which comprises a substrate, a magneto-optical recording layer provided on the substrate, a recording auxiliary layer provided on the substrate, a recording auxiliary layer provided on the magneto-optical recording layer and a heat sink layer provided on the side of the recording auxiliary layer.

Magneto-optical recording medium

A metal-containing indoaniline compound having the formula: ##STR1## wherein M is a metal atom of Group VIII, Ib, IIb, IIIb, IVa, Va, VIa or VIIa of the Periodic Table or its halide or oxide, rings A, B, C, D, E and F may have substituents, each of K.sup.1 K.sup.2 and K.sup.3 is a residue of a substituted or unsubstituted aromatic amine, each of l, m and n is 0 or 1, provided l+m+n=2 or 3, and p is 2, 3 or 4.

Metal-containing indoaniline compound and optical recording medium

Growing community of inventors

Tama, Japan

Kenichi Uchino