SummaryAmendment 2 to Recommendation ITU-T G.984.4 contains various updates to Recommendation ITU‑T G.984.4 (2008) and Recommendation ITU-T G.984.4 (2008) Amendment 1 (2009). A number of editorial corrections and clarifications are included, along with the following substantive changes and extensions to the G-PON OMCI. • A virtual interface definition for use when an ONT is managed by two domains, OMCI and for example TR-69. • An extended form of the OMCI message set to facilitate exchange of larger quantities of control plane information between ONT and OLT. • An ageing time attribute on dynamically learned MAC bridge addresses. • A means to distribute time of day from an OLT to an ONT. • Additional features to support the use of OMCI in ITU-T G.986 systems. • A mechanism that supports mutual authentication of OLT and ONT and secure transport of encryption keys.
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