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Answer» The following table explains the ADSL standards available as of today. | Version | Standard name | Common name | Downstream rate | Upstream rate | Approved in |
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| ADSL | ANSI T1.4131998 Issue 2 | ADSL | 8.0 Mbit/s | 1.0 Mbit/s | 1998 | | ADSL | ITU G.992.1 | ADSL (G.dmt) | 8.0 Mbit/s | 1.3 Mbit/s | 1999-07 | | ADSL | ITU G.992.1 Annex A | ADSL over POTS | 12.0 Mbit/s | 1.3 Mbit/s | 2001 | | ADSL | ITU G.992.1 Annex B | ADSL over ISDN | 12.0 Mbit/s | 1.8 Mbit/s | 2005 | | ADSL | ITU G.992.2 | ADSL Lite (G.lite) | 1.5 Mbit/s | 0.5 Mbit/s | 1999-07 | | ADSL2 | ITU G.992.3 | ADSL2 | 12.0 Mbit/s | 1.3 Mbit/s | 2002-07 | | ADSL2 | ITU G.992.3 Annex J | ADSL2 | 12.0 Mbit/s | 3.5 Mbit/s | | | ADSL2 | ITU G.992.3 Annex L | RE-ADSL2 | 5.0 Mbit/s | 0.8 Mbit/s | | | ADSL2 | ITU G.992.4 | splitterless ADSL2 | 1.5 Mbit/s | 0.5 Mbit/s | 2002-07 | | ADSL2+ | ITU G.992.5 | ADSL2+ | 24.0 Mbit/s | 1.4 Mbit/s | 2003-05 | | ADSL2+ | ITU G.992.5 Annex M | ADSL2+M | 24.0 Mbit/s | 3.3 Mbit/s 2008 | 2008 | | ADSL2++ | (up to 3.75 MHz) | ADSL4 | 52.0 Mbit/s ? | 5.0 Mbit/s | In development |
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