On 2007-04-11, John Navas <spamfilter1@navasgroup.com> wrote:
> On Wed, 11 Apr 2007 15:46:53 GMT, DTC <no_spam@move_along_folks.foob>
> wrote in <Np7Th.21636$tD2.13140@newsread1.news.pas.earthlin k.net>:
>
>>Then you have the new limitations on how far DSL will reach. Straight from
>>AT&T's sales department here are the latest deployment distances:
>>
>> 6 Mbps up to 6,500 ft.
>> 3 Mbps up to 9,500 ft.
>> 1.5 Mbps up to 14,000 ft.
>
> Those limits aren't really new.
>
>>For these customers, wireless broadband might be an alternative. But with
>>the telcos aggressively deploying DSLAMs in pedestals along the roadsides
>>instead of only at the central office as in the past, we're seeing DSL
>>being offered out in the country side.
>
> RE-ADSL2 and ADSL2+/RE-ADSL2+ are capable of much longer distances than
> standard ADSL, a range increase of roughly 50%. ("RE" is short for
> "Reach Extended.) ADSL2 and ADSL2+ are also capable of much higher
> speeds, up to 12 mbps and up to 24 mbps respectively. The questions are
> if and when AT&T will deploy them.

I know RE-ADSL2 (Annex L) is ADSL2 with the upper frequency dropped from
1104 kHz to 552 kHz, and I know ADSL2+ (Annex M) is ADSL2 with the upper
frequency increased from 1104 kHz to 2208 kHz, but I can't figure out
what the heck RE-ADSL2+ might be. ADSL2+ is normally considered to
be a higher speed (up to 24 Mbps) but more range-limited service because
higher frequencies are attenuated more strongly with distance (which is why
Reach-Extended ADSL2 does this by squeezing its signal into a smaller
bandwidth).

Also, I've not seen anyone claim more than about a 3000 foot increase
in reach for RE-ADSL2 over ADSL at the same speed. This might come close
to a 50% increase in coverage area, but not in range.

Dennis Ferguson