Scalable network restoration device

DC CAFC
  • US 6,404,734 B1
  • Filed: 10/06/1998
  • Issued: 06/11/2002
  • Est. Priority Date: 10/06/1998
  • Status: Expired due to Term
First Claim
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1. A telecommunications network, the telecommunications network incorporating plural nodes connected in a ring and having at least one straddling span, wherein a nodal switching device terminates the straddling span, the nodal switching device forming an add-drop multiplexer and the nodal switching device comprising:

  • a first network interface having a first spare port and a first working port;

    a second network interface having a second spare port and second working port;

    a third network interface having third and fourth working ports, the third network interface connecting to the straddling span;

    plural local interface ports, each local interface port being connected by a communication link within the nodal switching device with an associated one of the first, second, third and fourth working ports and being connectable by a communication link within the nodal switching device with each of the spare ports;

    each communication link including an internal switching device;

    a controller operably connected to each internal switching device; and

    the controller being configured to route traffic from one of the third and fourth working ports to one of the first and second spare ports upon occurrence of a failure on a span connected to the one of the third and fourth working ports.

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