Employing customer premises equipment in communications network maintenance

• US 6,453,153 B1
• Filed: 05/11/2000
• Issued: 09/17/2002
• Est. Priority Date: 05/14/1997
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Singer, Howard M., Shelby, Kevin Alan, Bowker, Duane Oliver, Daumer, William Richard
• Primary Examiner(s): Chin, Vivian
• Assistant Examiner(s): APPIAH, CHARLES NANA
• Application Number:
  US09/569,066
• Time in Patent Office: 859 Days
• Field of Search: 379/6, 379/24, 379/29, 379/347, 379/398, 379/403, 379/229, 379/410, 379/1, 379/9, 379/10.07, 379/15.01, 379/15.02, 379/29.06, 379/15.03, 379/15.05, 379/9.04, 379/10.02, 379/22.01, 379/22.02, 455/67.1, 455/67.6, 455/69, 455/522, 455/343, 455/67.4
• US Class Current: 455/67.14
• CPC Class Codes: H04M 2203/055 loopback testing
• CPC Class Codes: H04M 3/002 Applications of echo suppressors or cancellers in telephonic connections in two-way loud-speaking telephone systems H04M9/08, echo suppressors or cancellers per se H04B3/20
• CPC Class Codes: H04M 3/40 Applications of speech amplifiers
• CPC Class Codes: H04Q 1/44 using alternate current H04Q1/50 takes precedence

Abstract

The present invention customizes a network connection to customer premises equipment using a calibration signal. A network signal processor emits a tag signal indicating that a signal processing platform is in use. Customer premises equipment (CPE) issues a calibration signal to the network signal processor based on detection of the tag signal. The customer premises equipment outputs the calibration signal to the network signal processor which measures the signal loss, adjusts the gain mapping and issues a calibration signal to the customer premises equipment. The customer premises equipment then estimates spectral shaping based on the calibration signal from the network signal processor and equalizes the receive path so that the signal processing platform is detected and implemented. Embodiments of the present invention are illustrative of a more general concept of the use of CPE as an agent in telephone network maintenance.

Claims

1. A method for enhancing the performance of a telephone network, the method comprising:

transmitting a first signal from a telephone network element to customer premises equipment (CPE) via a telephone network path;

measuring, at the CPE, loss in the first signal related to transmission via the telephone network path and generating, as a second signal, a calibration signal representing the measured loss;

receiving at the telephone network element the second signal generated by the CPE; and

adjusting gain applied to a speech signal transmitted from the network element to the CPE based on the second signal.

2. The method of claim 1 wherein the first signal comprises a tone.

3. The method of claim 1 wherein the first signal comprises a wide-band signal.

4. The method of claim 1 wherein loss experienced by the first signal comprises loss at a plurality of frequency components.

5. The method of claim 1 wherein the step of adjusting gain comprises adjusting a plurality of gains at plurality of frequencies.

6. A method for enhancing the performance of a telephone network, the method comprising:

receiving at customer premises equipment (CPE) a first signal transmitted from a telephone network element via a telephone network path;

determining, at the CPE, loss experienced by the first signal due to transmission via the telephone network path;

generating as a second signal, at the CPE, a calibration signal representing a measure of the determined loss; and

transmitting the second signal to the telephone network element.

7. The method of claim 6 further comprising the step of:

receiving at the CPE a speech signal transmitted from the network element, the speech signal exhibiting a signal level which reflects gain applied by the network element in accordance with the second signal.

8. The method of claim 7 wherein gain applied by the network element comprises a plurality of gains at plurality of frequencies.

9. The method of claim 6 wherein the first signal comprises a wide-band signal and wherein the determined loss comprises loss values at a plurality of frequency components of the wide-band signal.