| Publisher | Aware | ||
|---|---|---|---|
| Format | Date added | 02 Aug 2002 | |
| Topics | VoIP - IP Telephony, Bandwidth Issues, DSL, Industry Standard Protocols | ||
| Downloads | 317 | ||
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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