DSL Standards Comparison
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|
Type DSL |
Standard |
Modulation/encoding Technique
|
Speed |
Distance Max Limit |
|
Full-rate ADSL/G.DMT |
ANSI T1.413 Issue 2 |
DMT or CAP |
Downstream speeds of
384 Kbps to 8 Mbps – upstream up to 1.024 Mbps |
18,000 feet |
|
G.Lite |
ITU-T G.992.1 ITU-T
G.992.2 |
DMT |
Downstream speed up to
1.5 Mbps – upstream speed up to 640 Kbps |
18,000 feet |
|
Very-high-data-rate DSL
(VDSL) |
In process as of this chart creation |
DMT/QAM |
12.96 Mbps – 52.8 Mbps -
both upstream and downstream |
4500 feet |
|
ISDN DSL (IDSL) |
ETSI ETR 080 |
2B1Q |
144 Kbps - both
upstream and downstream |
18,000 feet |
|
SDSL |
None |
2B1Q |
768 Kbps - both
upstream and downstream |
22,000 feet |
|
High-data-rate DSL
(HDSL) |
ITU-T G.991.1, ANSI TR
28 |
2B1Q |
1.544 or 2.048 Mbps f-
both upstream and downstream |
12,000 feet |
|
G.SHDSL |
ITU-T G.991.2 |
TC PAM |
192 Kbps to 2.3 Mbps -
both upstream and downstream |
28,000 feet |