Amendment 2 to Recommendation ITU-T G.993.2 (2011) covers the following functionalities:

  1. Electrical length estimation method (corrigendum).
  2. INPMIN‑ROC (corrigendum).
  3. Accuracy of test parameters (adding functionality).
  4. INM facility (corrigendum).
  5. O‑SIGNATURE field for Upstream FDPS descriptor (new functionality).
  6. SRA after SOS (corrigendum).
  7. Annex B (Region B – Europe) (corrigendum and adding functionality).
  8. Annex Y with optional “pilot sequence length multiple of 4” (corrigendum) and optional FDPS (new functionality).