White Papers

ADSL2 and ADSL2+: The New ADSL Standards

Overview As the number of users of ADSL chipsets based on first-generation ADSL standards surpasses 25 million, the ITU has completed and approved the newest revision of international ADSL standards. The new standards are referred to as "G.dmt.bis" and "G.lite.bis" at the ITU, but will become better known as "ADSL2." By the first quarter of 2003, leading silicon vendors are expected to have solutions available that support and interoperate with ADSL2 equipment as well as legacy ADSL equipment.

ADSL systems, on long lines where the data rate is low (e. g. 128 kbps), a fixed 32 kbps (or 25% of the total data rate) is allocated to overhead information. In ADSL2 systems, the overhead data rate can be reduced to 4 kbps, which provides an additional 28 kbps for payload data.

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Publisher
Aware
File Format
PDF
Date Published
Nov 9, 2009
Format
White Papers
Topics
DSL, Industry Standard Protocols, VoIP - IP Telephony, Bandwidth Issues

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