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Selector switch control using priority table

  • US 5,920,542 A
  • Filed: 06/28/1996
  • Issued: 07/06/1999
  • Est. Priority Date: 02/22/1996
  • Status: Expired due to Term
First Claim
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1. A method to control a selector switch in a telecommunications network containing network equipment having at least one selector switch having a plurality of positions, each position corresponding to one of a plurality of input signals, wherein cach said selector switch selects one of said plurality of positions according to a predetermined priority value, comprising the steps of;

  • creating a table having a plurality of entries each entry having a first field to store one of said plurality of selector switch positions and a second to store a predetermined priority value corresponding to a signal to be input at said one of said selector switch position;

    storing a first predetermined priority value in said second field of a first entry in said table, and a second predetermined priority value in said second field of a second entry in said table, wherein said first priority value is equal to said second predetermined priority value when a first signal coupled to said selector switch at a first position corresponding to said first field of said first entry is to serve as a substitute for a second signal coupled to said selector switch at a second position corresponding to said first field of said second entry if said second signal is disrupted; and

    assigning priority values in said priority table to thereby control network topology, wherein said assigning step comprises the step of;

    storing a high predetermined priority value in a second field of an entry in said table having a position in said first field of said entry that corresponds to a preferred network topology; and

    storing a predetermined priority value, lower than said high predetermined priority value, in a second field of another entry in said table having a position in said first field that corresponds to a backup network topology.

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