Amendment 1 to Recommendation ITU-T G.9903 (2012) contains:
· The support for an optional coherent mode for use in CENELEC bandplans.
· Support for a new bandplan in CENELEC B.
· A Regional Annex for Japan (Annex K)
· A new routing algorithm (LOADng) that replaces the old one (LOAD).
· A clause on coexistence with other NB-PLC technologies.
· Various clarifications and corrections including CFA, Header Compression, and channel access mechanism.
· A major editorial restructuring.