This amendment contains the new Annexes J and M to ITU-T Rec. G.992.5 as follows:
• a new Annex J – All Digital Mode ADSL with improved spectral compatibility with ADSL over ISDN (this was "for further study" in ITU-T Rec. G.992.5);
• an Annex L intentionally left blank;
• a new Annex M – Specific requirements for an ADSL system with extended upstream bandwidth operating in the frequency band above POTS (this was "for further study" in ITU-T Rec. G.992.5 as Annex L).