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Method and apparatus for connecting branch networks with a trunk network in optical transmission system

  • US 5,060,224 A
  • Filed: 01/29/1990
  • Issued: 10/22/1991
  • Est. Priority Date: 11/30/1987
  • Status: Expired due to Term
First Claim
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1. An apparatus for connecting branch networks with a trunk network including a plurality of nodes having a loop back function and optical transmission lines, the apparatus comprising:

  • switch means for switching a data flow between the trunk network and the branch network;

    first converting means for converting a first optical signal from the trunk network through the switch means into a first electric signal;

    second converting means for concerting first serial data representing the converted first electric signal into first parallel data; and

    interface means for receiving the converted first parallel data, transferring the received first parallel data to the branch network, receiving a second parallel data from the branch network, transferring the received second parallel data to the second converting means, and controlling the switch means, andwherein the second converting means includes means for converting the second parallel data from the interface means into second serial data; and

    the first converting means includes means for converting a second electric signal representing the converted second serial data into a second optical signal.

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