Automatic protection network switching

  • US 7,609,621 B1
  • Filed: 02/10/2004
  • Issued: 10/27/2009
  • Est. Priority Date: 02/10/2004
  • Status: Active Grant
First Claim
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1. A method of protecting a protected egress link including:

  • connecting traffic from a service module to a first physical module having a link layer framer that is connected via a link interface of the first physical module to the protected egress link, wherein the link layer framer includes a queue for storing the traffic; and

    connecting the traffic input to the link interface of the first physical module through a pooling switch to a second physical module that is connected via a link interface of the second physical module to an alternate egress link, wherein the traffic in the second physical module is not processed through a link layer framer of the second physical module but is processed through the link layer framer of the first physical module.

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