Recommendation ITU-T G.9960 belongs to the family of ITU-T G.996x Recommendations. Recommendation ITU-T G.9960 specifies the system architecture and physical (PHY) layer for wireline-based home networking transceivers which are capable of operating over premises' wiring, including inside telephone wiring, coaxial cable, and power-line wiring. It complements the data link layer (DLL) specification in Recommendation ITU‑T G.9961, and the power spectral density (PSD) specification in Recommendation ITU-T G.9964. G.9960 (2023) comprises ITU-T G.9960 (2018) plus its Corrigendum 1, Amendment 1, Amendment 2, Corrigendum 2 and Amendment 3, along with the specification of a new PHY frame type for use by ITU-T G.9991. Amendment 1 to G.9960 (2023) adds the new feature HBMSG/HBACK.