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Optical switching unit and control method for same

  • US 5,812,290 A
  • Filed: 12/12/1996
  • Issued: 09/22/1998
  • Est. Priority Date: 12/15/1995
  • Status: Expired due to Term
First Claim
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1. An optical switching unit comprising:

  • an optical transmitter arranged within an optical switching unit;

    an optical switch having message input ports for receiving message transmissions and at least one input dummy ports, said input dummy port being capable of multicast transmission that simultaneously transmits from said input dummy port connected to said optical transmitter to a plurality of output ports; and

    switch controlling means that controls transmission of said optical transmitter and switching of said optical switch, such that when at least one of said output ports is disconnected from said message input port the switch controller connects said disconnected output port to said input dummy port in real time wherein said transmitter directly provides a prescribed control code to said disconnected output port for notification of completion of message transmission and said disconnection.

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