The ADSL2+ Router compliance to ADSL standards : ANSI T1.413 Issue 2, ITU-T G.992.1 (G.dmt), ITU-T G.992.2 (G.lite), ITU-T G.992.3 (G.dmt.bis/ADSL2), and ITU-T G.992.5 (ADSL3plus) specification. Both Annex A (ADSL over POTS) and Annex B (ADSL over ISDN)
ANSI T1.413 Issue 2, ITU-T G.992.1(G.dmt)