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Telecommunications switch with improved redundancy

  • US 5,596,569 A
  • Filed: 10/10/1995
  • Issued: 01/21/1997
  • Est. Priority Date: 03/08/1994
  • Status: Expired due to Term
First Claim
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1. A programmable telecommunications switch comprising:

  • a switching matrix for dynamically connecting and disconnecting communications paths between a plurality of communication channels;

    a first line module configured to receive at least one telecommunications signal of a certain protocol type and transmit the telecommunications signal to a first communication channel of the plurality of communications channels of the switching matrix, wherein the first line module is independently instructable to transmit to any one of the plurality of communication channels;

    a second line module configured to receive at least one telecommunications signal of said certain protocol, wherein the second line module is independently instructable to transmit a received telecommunications signal to any one of the plurality of communication channels;

    an active input device configured to terminate an external span having at least one conductor carrying at least one telecommunications signal of said certain protocol type, the active input device having a plurality of connection modes, a first mode being such that the span is connected in a communicating relationship to the first line module and a second mode being such that the span is connected in a communicating relationship to the second line module, the active input device changing from the first mode to the second mode in response to a changeover signal; and

    a data processor configured to respond to a malfunction of the first line module by instructing the second line module to transmit received telecommunications signals to the first communication channel and generating the changeover signal, thereby causing the first line module to be functionally replaced by the second line module.

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