System and method for testing a telecommunications apparatus

• US 5,933,475 A
• Filed: 06/04/1997
• Issued: 08/03/1999
• Est. Priority Date: 06/04/1997
• Status: Expired due to Term

• Current Assignee: Interactive Quality Services Incorporated (Integrated Research Limited)
• Original Assignee: Interactive Quality Services Incorporated (Integrated Research Limited)
• Inventors: Coleman, William A.
• Primary Examiner(s): Loomis, Paul
• Assistant Examiner(s): TIEU, BINH KIEN
• Application Number:
  US08/868,876
• Time in Patent Office: 790 Days
• Field of Search: 379/1, 379/6, 379/9-10, 379/12, 379/15, 379/16-18, 379/20, 379/23-24, 379/27, 379/29, 379/31, 379/32, 379/34, 379/265, 379/308, 379/309
• US Class Current: 379/10.01
• CPC Class Codes: H04B 17/0085 using test signal generators
• CPC Class Codes: H04B 17/391 Modelling the propagation channel
• CPC Class Codes: H04M 3/323 for the arrangements providing the connection (test connection, test call, call simulation)

Abstract

A method for testing a telecommunications system. The method includes initializing parameters of a telecommunications tester. A test sequence is executed from instructions stored in the telecommunications tester. The duration of at least one speech audio signal or period of silence produced by the telecommunications system is measured. The result of the measuring step is compared with an expected value to determine whether the appropriate speech audio was produced by the telecommunications system.

Claims

1. A method for testing a telecommunications system, the method comprising:

initializing parameters of a telecommunications tester, including initializing a silence timeout parameter;

executing a test sequence from instructions stored in the telecommunications tester;

measuring the duration of at least one speech audio signal or period of silence produced by the telecommunications system, wherein periods of silence less than the value of the silence timeout parameter are ignored while measuring the duration of at least one speech audio signal; and

comparing the result of the measuring step with an expected value to determine whether the appropriate speech audio was produced by the telecommunications system.

2. The method of claim 1, wherein initializing the silence timeout parameter comprises setting the silence timeout parameter to a value between zero and five seconds in increments of one millisecond.

3. The method of claim 1, wherein executing a test sequence comprises providing signals to the telecommunication system to elicit speech audio signals.

4. The method of claim 1, wherein measuring the duration of at least one speech audio signal or period of silence comprises measuring the duration with a call progress detection circuit.

5. The method of claim 1, and further comprising storing the measured duration of the speech audio or period of silence.

6. The method of claim 1, wherein comparing the result of the measuring step with an expected value includes comparing the result of the measuring step with a set of expected values to determine which of the members of the set of expected values was produced by the telecommunications system.

7. The method of claim 1, wherein measuring the duration of at least one speech audio signal or period of silence comprises measuring the duration of a plurality of speech audio signals or periods of silence to create a number of values for comparison with expected values.

8. A method for testing a telecommunications system that provides visual information regarding a caller to an operator, the method comprising:

launching a telephone call to the telecommunications system which routes the call to an operator and displays visual information for the operator;

executing a sequence of interactive queries over the telecommunications system;

storing signals that represent non-speech responses to the queries; and

evaluating the responses provided by the operator over the telecommunications system.

9. The method of claim 8, and further comprising routing the call to the telecommunications system to a voice response system for gathering information about the caller to be displayed to the operator.

10. The method of claim 8, and further comprising measuring the time duration of at least one speech audio signal or period of silence generated by the telecommunications system during the sequence of interactive queries.

11. The method of claim 8, wherein executing a sequence of interactive queries comprises playing speech audio prompts that ask the operator to identify selected portions of the displayed information.

12. A method for testing automated calling systems, the method comprising:

receiving a call from the automated calling system;

determining whether to answer the call;

when not answering the call, generating a busy signal; and

when answering the test call after some period of delay,

selectively providing a signal to the telecommunications system from a set of signals expected to be received by the telecommunications system so as to test the ability of the automated calling system to determine the nature of the answering person or device,

executing a number of interactive queries with the telecommunications system,

receiving and storing the non-speech responses the telecommunications system, and

evaluating the responses.

13. The method of claim 12, wherein executing a number of interactive queries with the telecommunications system includes playing an audio prompt that requests an operator to dial digits to indicate the location at which the call is terminated.

14. The method of claim 12, wherein executing a number of interactive queries with the telecommunications system includes playing an audio prompt that requests an operator to dial digits to identify the presence of information displayed to an operator.

15. The method of claim 12, wherein executing a number of interactive queries with the telecommunications system includes playing an audio prompt that requests an operator to dial digits to identify the presence of audio information provided to the operator.

16. The method of claim 12, wherein receiving and storing responses includes analyzing speech audio by measuring the duration of the speech audio and comparing the measurement with expected values.

17. The method of claim 12, and further comprising providing a request to the telecommunications system to place the call to a testing system.

18. The method of claim 17, wherein providing a request to the telecommunications system comprises depositing a message with the telecommunications system over a data communication network.

19. The method of claim 18, wherein depositing a message with the telecommunications system over a data communication network comprises depositing a message with the telecommunications system over the internet.

20. The method of claim 18, and further including initiating a modem communication process for receipt of a facsimile from the telecommunications system.

21. A method for testing the service level of an active telecommunication system, the method comprising:

initializing parameters of a telecommunications tester, including initializing a silence timeout parameter;

launching a telephone call to the telecommunications system during normal operation of the telecommunications system;

executing a test sequence;

measuring the duration of at least one speech audio response signal or period of silence generated by the telecommunications system during the test sequence, wherein periods of silence less than the value of the silence timeout parameter are ignored while measuring the duration of at least one speech audio signal;

storing the measurements;

repeating the launching, executing, measuring and storing to obtain additional measurements on the operation of the telecommunications system;

comparing the measurements with expected values; and

reporting the results of the comparison.

22. The method of claim 21, wherein reporting results comprises launching a telephone call and playing a speech audio message that identifies errors in the operation of the telecommunications system.

23. The method of claim 22, and further comprising prompting a recipient of the call to dial digits to acknowledge receipt of the message.

24. The method of claim 21, wherein reporting results comprises depositing a message with a data communication system.

25. The method of claim 24, wherein depositing a message with a data communication system comprises depositing an e-mail message.

26. The method of claim 25, wherein depositing an e-mail message comprises depositing an e-mail message over the internet.