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Method for controlling bidirectional line protection switching by using a remote defect indication signal

  • US 5,926,102 A
  • Filed: 07/11/1997
  • Issued: 07/20/1999
  • Est. Priority Date: 11/16/1996
  • Status: Expired due to Term
First Claim
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1. A method for controlling bidirectional line protection switching by using a remote defect indication signal, applied to a transmission system having two stations in which the traffic transmitting end of both a working line and a protection line are bridged over each other, comprising the steps of:

  • inserting and transmitting a remote defect indication signal through an opposite directional link, in case a receiving end of the working line detects a defect while a traffic is transmitted via a bidirectional link, and then switching to a first protection line by means of controlling a first selector of a first station; and

    simultaneously switching to a second protection line by means of controlling a second selector of a second station, in case the remote defect indication signal is detected via the opposite directional link, while a traffic is transmitted via a bidirectional link.

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