Optical switching unit and control method for same
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Dec 12, 1996
filing date -
Dec 15, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides means by which a switch controller that manages lines directly notifies receivers of ineffectiveness of received data upon line disconnection instead of any transmitter indirectly notifying receivers; and according to the invention, an optical transmitter is provided within the optical switching unit, and a switch controller controls the optical transmitter within the optical switching unit and an optical switch having at its input ports one or more dummy ports capable of multicast-transmission. According to this control, upon line disconnection, receivers are connected to the optical transmitter within the optical switching unit that transmits control code in real time, thereby preventing receivers from receiving ineffective data and obviating superfluous signal lines and communication processes between the switch controller and transmitters.
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