Summary

Recommendation ITU-T G.9961 belongs to the family of ITU-T G.996x Recommendations. Recommendation ITU-T G.9961 specifies the data link layer (DLL) for wireline-based home networking transceivers capable of operating over premises wiring including inside telephone wiring, coaxial cable, and power-line wiring. It complements the system architecture and physical (PHY) layer specification in Recommendation ITU-T G.9960, and the power spectral density (PSD) specification in Recommendation ITU-T G.9964.

Amendment 1 includes a new physical layer specification. This new physical layer provides new modulation mechanisms (e.g. multi-level coding) and robust communication mode (RCM), and allows the system to be operated over an extended bandwidth for coaxial and phoneline mediums.

Amendment 2 includes a new Annex D on IEEE 802.1X port-based network access control, means for delivering management data across the A interface, and support for a wider range of applications of the G.hn technology (e.g., means to indicate the category of applications and actual application that the domain is implementing).

Amendment 3 includes enhancements to simplify routing mechanisms in tree topologies.