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Upgrading the control of switching systems

  • US 5,960,205 A
  • Filed: 10/30/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 10/30/1997
  • Status: Expired due to Term
First Claim
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1. In a telephone switching system, a method for performing a multi-stage software upgrade to a target release, comprising the steps of:

  • (a) in said telephone switching system, providing duplicate processors and duplicate disk file controllers, each controller comprising a disk file;

    (b) deriving program text for the target release;

    (c) deriving office dependent data for the target release by iteratively deriving intermediate release office dependent data, in each case from a previous release of office dependent data;

    (d) inserting said program text and said office dependent data for the target release into a file of one of said duplicate disk file controllers;

    (e) connecting said one of said duplicate disk file controllers to one of the duplicate processors;

    (f) connecting said one of said duplicate processors to peripherals of said telephone switching system;

    (g) switching control of said telephone switching system to said one of said duplicate processors;

    (h) inserting said program text and said office dependent data for the target release into a file of the other of said duplicated disk file controllers;

    (i) connecting the other of said processors to the other of said duplicate disk file controllers; and

    (j) connecting the other of said duplicate processors to said peripherals of said telephone switching system.

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