| Patent No. | Patent Title: |
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| 6940968 | Telephone terminal apparatus and method |
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| 6934396 | Speaker embedded with oral setup tutorial |
| 6928161 | Echo cancellation apparatus, systems, and methods |
| 6928171 | Circuit and method for the adaptive suppression of noise |
| 6925168 | Telecommunications network |
| 6920219 | Method and apparatus for providing echo cancellation |
| 6920218 | Combination clock and charge pump for line powered DAA |
| 6917688 | Adaptive noise cancelling microphone system |
| 6917680 | Apparatus for disabling a telephone ringer |
| 6914979 | Tone detection |
| 6912286 | Active noise cancellation system with integrated horn function |
| 6907129 | System and method for digital volume control |
| 6901147 | Three-dimension active silencer |
| 6895089 | Pots splitter with line impedance matching |
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| 6895086 | 3-Way call detection system and method |
| 6891955 | Audio volume control for computer systems |
| 6891947 | Multifunctional analog trunk circuit |
| 6891954 | Vehicle-mounted noise control apparatus |
| 6891948 | Echo canceller |
| 6888939 | Circuit for joint transmitting voice and data over a telephone li... |
| 6885899 | Method and apparatus for controlling a sound function of a comput... |
| 6885746 | Crosstalk identification for spectrum management in broadband tel... |
| 6885750 | Asymmetric multichannel filter |
| 6882731 | Multi-channel audio converter |
| 6876741 | Device for detecting telephone line seizure |
| 6873705 | Combine audio and ringing mode |
| 6873701 | System and method for DTMF detection using likelihood ratios |
| 6870933 | Stereo audio processing device for deriving auxiliary audio signa... |
| 6868158 | Echo processing apparatus |
| 6868156 | Non-voice signal repeater for speech coders |
| 6868157 | Echo canceling method, echo canceller and voice switch |
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