Summary

This Recommendation is in the family of ITU-T Rec. J.112. Its purpose is to provide a technology through which the demand for symmetrical services on cable networks can be met. This second‑generation technology, while using the same RF channel, is backward compatible with that of ITU-T Rec. J.112. It provides a significant increase in upstream channel capacity with wider channels, higher symbol rate and increased spectral efficiency. It provides for both Synchronous-CDMA and Advanced-TDMA coding and also adds higher order modulation capabilities. It is more robust with regard to noise immunity and provides greater multipath protection than the technology used in ITU-T Rec. J.112.