Calibration system for telephone

1 . In an audio processor for two way communication, the improvement comprising:

a signal generator for producing test signals coupled to selected test points in the audio processor.

2 . The audio processor as set forth in claim 1 wherein said audio processor includes an echo canceling circuit and a voice detection circuit and wherein said echo canceling circuit and voice detection circuit provide data representing the response of the audio processing circuit to said test signals.

3 . The audio processor as set forth in claim 1 wherein said test signals include a single tone signal.

4 . The audio processor as set forth in claim 1 wherein said test signals include a sweep frequency signal.

5 . The audio processor as set forth in claim 1 wherein said test signals include white noise.

6 . Apparatus for testing a telephone, said apparatus comprising:

a computer;

an interface coupled to the computer;

a telephone coupled to the interface;

an audio processor circuit in said telephone, said audio processor including a signal generator controlled by said computer for producing test signals coupled to selected test points in the audio processor.

7 . The apparatus as set forth in claim 6 wherein said audio processor includes an echo canceling circuit and a voice detection circuit and wherein said echo canceling circuit and voice detection circuit provide data to said computer representing the response of the audio processing circuit to said test signals.

8 . The apparatus as set forth in claim 7 wherein said telephone and said computer each include a wireless interface and said data is coupled to said computer by way of said wireless interface.

9 . The audio processor as set forth in claim 6 wherein said test signals include a single tone signal.

10 . The audio processor as set forth in claim 6 wherein said test signals include a sweep frequency signal.

11 . The audio processor as set forth in claim 6 wherein said test signals include white noise.

12 . A method for calibrating a telephone, said method including the steps of:

coupling the telephone to a computer by way of an interface;

configuring the telephone to produce standardized signal levels;

applying test signals to test points the telephone;

receiving data signals from the telephone indicative of at least one parameter under test; and

adjusting the operation of the telephone in accordance with the data signals.

13 . The method as set forth in claim 12 wherein the test signals are prerecorded voice signals.

14 . The method as set forth in claim 12 wherein the test signals are generated within the telephone.

15 . The method as set forth in claim 12 wherein the at least one parameter is acoustic echo return loss.

16 . The method as set forth in claim 12 wherein the at least one parameter is echo to near end speech ratio.