Abstract: An improved modem architecture and associated method are disclosed that integrate modem functionality and line-side isolation functionality while also providing a modem interface that allows raw data, such as raw pulse-code-modulated (PCM) data, or modem data to be selectively communicated through a serial interface.

Abstract: A method and a device by which original digital signals are analysis-filtered, where the original digital signals include original samples representing physical quantities, and where the original samples are transformed by successive calculation steps into high and low frequency output samples. Any sample calculated at a given step is calculated by a predetermined function of the original samples and/or previously calculated samples, where the samples are ordered by increasing rank. The signal is processed by successive input blocks of samples, where the calculations made on an input block under consideration take into account only the original or calculated samples belonging to the input block under consideration, and where the input block under consideration and the following input block overlap over a predetermined number of original samples. Output blocks are formed, where each output block corresponds respectively to an input block.

Abstract: A method of providing time tracking between a first signal and a second signal in a communication device. In one embodiment, a first signal is generated by the communication device and a second signal is received from an outside source. Then correlation data between a first signal, at a plurality of timing conditions, and a second signal is generated by hardware. Next, the correlation data is filtered by software or firmware at a plurality of timing conditions. Afterward, the correlation data is compared to a threshold value to evaluate accuracy of a system timing for the first signal to obtain a result. Finally, the system timing for the first signal is corrected based upon said result of the comparing step.