Behavior monitoring and analyzing system for stored program controlled ...

United States Patent [m

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US005488648A

[ii] Patent Number: 5,488,648

[45] Date of Patent: Jan. 30, 1996

[54] BEHAVIOR MONITORING AND ANALYZING SYSTEM FOR STORED PROGRAM CONTROLLED SWITCHING SYSTEM

[75] Inventor: Brian R. Womble, Bedford, Tex.

[73] Assignee: Telefonaktiebolaget L M Ericsson,

Stockholm, Sweden

[21] Appl. No.: 107,965

[22] Filed: Aug. 17, 1993

[51] Int. CI.6 H04M 1/24; H04M 3/08;

H04M 3/22; H04J 1/16

[52] U.S. CI 375/13; 375/1; 375/32;

375/34; 370/13

[58] Field of Search 379/1, 9, 10, 11,

379/12, 13, 14, 15, 16, 34, 32; 370/13

[56] References Cited

U.S. PATENT DOCUMENTS

3,917,915 11/1975 Karras 179/175.2 C

4,022,978 5/1977 Connell et al 179/8 A

4,238,649 12/1980 Kemler 379/14 X

4,311,882 1/1982 Johner et al 179/175.2 D

4,680,784 7/1987 Lehnert et al 379/11

4,723,270 2/1988 Okamoto et al 379/113

4,788,718 11/1988 McNabb et al 379/113

4,815,120 3/1989 Kosich 379/34

4,924,488 5/1990 Kosich 379/34

4,937,862 6/1990 Kosich 380/3

4,945,554 7/1990 Krause et al 379/10

4,972,453 11/1990 Daniel, III et al 379/10

5,065,422 11/1991 Ishikawa 379/11

5,101,424 3/1992 Clayton et al 379/10

5,241,580 8/1993 Babson, III 379/10 X

5,276,727 1/1994 Kim et al 379/14 X

5,369,680 11/1994 Borbas et al 379/13 X

Primary Examiner—Stephen Chin
Assistant Examiner—Paul Loomis
Attorney, Agent, or Firm—Jenkens & Gilchrist

[57] ABSTRACT

A test and diagnostic tool for stored program controlled telecommunications switching systems captures the occurrence and timing of "events" arising from subscriber actions and from actions which occur within blocks of software in the telecommunication switching system. Data related to the captured events as well as an indication of their location are stored in a large buffer memory. The stored data is then used to analyze the events for the diagnosis and correction of the cause of the fault as well as to recreate the same sequence and timing of events at a later period in order to test the corrections which have been made to ensure that they eliminate the cause of the fault condition.

26 Claims, 4 Drawing Sheets