I want to know whether the (ITU G.992.5)ADSL2+ devices supports (ITU G.992.1) ADSL.
And whether the devices witch supports Annex M are backward compatible with Annex A.
for an example.
if there is a device which supports ADSL2/ADSL2+ with Annex M, can we come to the conclusion that the respective device will support ADSL, ADSL2 and ADSL2+ with Annex A, without any trouble.
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