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Failure tolerant high density dial router

  • US 6,330,221 B1
  • Filed: 06/18/1998
  • Issued: 12/11/2001
  • Est. Priority Date: 06/18/1998
  • Status: Expired due to Term
First Claim
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1. A fault tolerant dial router, comprising:

  • a primary line interface unit coupled to telephone lines from a telephone network;

    a primary conversion subsystem converting calls on the telephone lines into packets;

    a router routing the packets on a packet based network; and

    a primary cross-connect switch coupled between the primary line interface unit and the primary conversion subsystem that reconnects the primary line interface unit to a secondary conversion subsystem when a failure is detected in the primary subsystem, the primary cross-connect switch also configurable to switch around a failed primary line interface unit while maintaining operation of the primary conversion subsystem connected to the failed primary line interface unit by disconnecting the primary line interface unit from the primary conversion subsystem and connecting a secondary line interface unit to the primary conversion subsystem.

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