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・ G.723
・ G.723.1
・ G.726
・ G.728
・ G.729
・ G.729.1
・ G.783
・ G.806
・ G.811
・ G.8261
・ G.983
・ G.984
・ G.988
・ G.992.1
・ G.992.2
G.992.3
・ G.992.3 Annex J
・ G.992.3 Annex L
・ G.992.4
・ G.992.5
・ G.9963
・ G.9970
・ G.9972
・ G.A. Miller
・ G.A. Siwabessy
・ G.A.D. (album)
・ G.A.Inter School Hajipur
・ G.A.M. Isherwood
・ G.A.M.E.
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G.992.3 : ウィキペディア英語版
G.992.3

ITU G.992.3 is an ITU (International Telecommunication Union) standard, also referred to as ADSL2 or G.dmt.bis. It optionally extends the capability of basic ADSL in data rates to 12 Mbit/s downstream and, depending on Annex version, up to 3.5 Mbit/s upstream (with a mandatory capability of ADSL2 transceivers of 8 Mbit/s downstream and 800 kbit/s upstream). ADSL2 uses the same bandwidth as ADSL but achieves higher throughput via improved modulation techniques. Actual speeds may reduce depending on line quality; usually the most significant factor in line quality is the distance from the DSLAM to the customer's equipment.
File:ADSL2 frequencies.png
==Annex versions==
ADSL2 has multiple modes for DSL providers to offer services for different needs. Below is a list of available features based on ADSL2 specs from the ITU standards.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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