The would depend on what country you're in, and what "Annex A" refers to. Usually it's referring to ADSL Annex A for POTS, and ADSL Annex B for ISDN, although the European bandplans for VDSL2 are in G.993.2 Annex B and the North American bandplans for VDSL2 are in G.993.2 Annex A.