Abstract: A system receives an incoming datastream at an incoming data rate or transmits an outgoing datastream at an outgoing data rate. The system may include a detection circuit to monitor the signal quality of the datastream. Responsive to changes in the monitored signal quality, the system may switch the data rate from a first data rate to a new data rate. If signal conditions are favorable, the system may switch to a higher data rate than the first data rate. If signal quality conditions worsen, the system may switch from the first data rate to a lower data rate to allow for a reduction in error rate.

Abstract: A system may concurrently transport datastreams over the common, differential and phantom modes of pair conductor media. The system may implement the phantom mode transport using the differential of multiple common modes. In multiple conductor pair implementations, multiple phantom modes may share a single return signal route. In some implementations, usage of common modes and phantom modes may be paired with schemes to increase signal robustness.

Abstract: A system may concurrently transport datastreams over the common, differential and phantom modes of pair conductor media. The system may implement the phantom mode transport using the differential of multiple common modes. In multiple conductor pair implementations, multiple phantom modes may share a single return signal route. In some implementations, usage of common modes and phantom modes may be paired with schemes to increase signal robustness.

Abstract: Transceiver architecture includes circuitry and a method to transmit and receive high speed WAP data over lower speed cabling such as Cat5e. The method begins by measuring quality of a wired bi-directional communications channel. The method continues by selecting a maximum possible data transmission rate over the wired bi-directional communications channel for the measured quality level and when the maximum possible data transmission rate is a reduced data transmission rate less than a maximum data transmission rate of the transceivers, proportionally adjusting clock rates of circuit elements of the first and second transceiver to transfer the data at the reduced data transmission rate. The method includes dividing data frames of the data to be transmitted N times, where N=number of layers of at least a portion of identical transceiver processing circuitry which is connected to twisted wiring pairs of the wired bi-directional communications channel.

Abstract: A system receives an incoming datastream at an incoming data rate or transmits an outgoing datastream at an outgoing data rate. The system may include a detection circuit to monitor the signal quality of the datastream. Responsive to changes in the monitored signal quality, the system may switch the data rate from a first data rate to a new data rate. If signal conditions are favorable, the system may switch to a higher data rate than the first data rate. If signal quality conditions worsen, the system may switch from the first data rate to a lower data rate to allow for a reduction in error rate.

Abstract: Transceiver architecture includes circuitry and a method to transmit and receive high speed WAP data over lower speed cabling such as Cat5e. The method begins by measuring quality of a wired bi-directional communications channel. The method continues by selecting a maximum possible data transmission rate over the wired bi-directional communications channel for the measured quality level and when the maximum possible data transmission rate is a reduced data transmission rate less than a maximum data transmission rate of the transceivers, proportionally adjusting clock rates of circuit elements of the first and second transceiver to transfer the data at the reduced data transmission rate. The method includes dividing data frames of the data to be transmitted N times, where N=number of layers of at least a portion of identical transceiver processing circuitry which is connected to twisted wiring pairs of the wired bi-directional communications channel.

Abstract: An improved read channel for storage and communication application particularly useful in optical storage applications. The improved read channel includes a Viterbi sequence detector tuned to a preferred partial response target well suited to sensing of pulses in the waveforms typical of optical storage read heads. In particular, the read channel of the present invention implements pulse and sequence detection for a partial response target having a spectral null at the Nyquist frequency and having a relative minimum between zero and the Nyquist frequency. In other words, the partial response target of the improved read channel is not a monotonic decreasing function between zero and the Nyquist frequency as is known in present read channels. More specifically, in the preferred embodiment, the partial response target of the read channel includes a spectral null at the Nyquist frequency and another spectral null at half the Nyquist frequency.