Dual media local area network interfacing

Details Dual media local area network interfacing Dual media local area network interfacing

H - Electricity

04

L

325/1

H04L 12/28 (2006.01) H04L 12/46 (2006.01)

Patent

CA 1275699

Abstract of the Disclosure A dual media network interface module includes an electrical network interface and an optical network interface each having a transmit port to which signals to be transmitted on the associated network are applied and a receiver port at which signals received on the network are generated. The receiver port of each interface is connected to the transmitter port of the other interface so that signals received on either network are retransmitted on the other network. Blocking circuits block the receiver signal of a LAN which is transmitting during the transmitting interval plus an interval which exceeds the worst case propagation time for the associated network to prevent endless repetition of a signal. A preferred form of the module includes a pair of controller interfaces having transmit ports and receiver ports connected to the corresponding ports of the other controller interface and of the electrical and optical network interfaces to provide bi- directional communications between all devices connected to the module. The modules can be used to interface electrical and optical nodes in a network, to expand both electrical and optical networks, and to interconnect various combinations of electrical and optical local area networks.

562989

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