tpower
join:2001-03-28
Snellville, GA | DSL/Cable Could...... If the cable companies and other Telcos such as AT&T would change their motto, and upgrade the infrastructure they could compete less expensively than running fiber. I agree FTTH is the way to go, but AT&T, Qwest, Comcast and Time Warners current motto seems to be legislate and litigate instead of innovate.
Cable Providers could offer this speed technically.....
Docsis 2.0 is capable of 38Mbit/s down and 28Mbit/s upload.
Docsis 3.0 is capable of 152Mbit/s down and 108Mbit/s upload
So ... technically Cable Companies such as Time Warner and Comca$t could offer with Docsis 2.0 with 28mbit symmetrical and Docsis 3.0 108mbit symmetrical.
The Copper DSL Carriers could compete using copper if they would upgrade the DSLAMS.
VDSL2:
»en.wikipedia.org/wiki/VDSL2
ITU-T G.993.2 (VDSL2) is an enhancement to G.993.1 (VDSL) that permits the transmission of asymmetric and symmetric (Full-Duplex) aggregate data rates up to 200 Mbit/s on twisted pairs using a bandwidth up to 30 MHz.
LR-VDSL2 enabled systems are capable of supporting speeds of around 1-4 Mbit/s (downstream) over distances of 4 to 5 km, gradually increasing the bit rate up to symmetric 100 Mbit/s as loop-length shortens.
ADSL2+
»en.wikipedia.org/wiki/ADSL2%2B
ADSL2+ extends the capability of basic ADSL by doubling the number of downstream bits. The data rates can be as high as 24 Mbit/s downstream and 1 Mbit/s upstream depending on the distance from the DSLAM to the customer's home.
ADSL2+ is capable of doubling the frequency band of typical ADSL connections from 1.1 MHz to 2.2 MHz. This doubles the downstream data rates of the previous ADSL2 standard of up to 12 Mbit/s, but like the previous standards will degrade from its peak bitrate after a certain distance.
ITU G.992.5 Annex M (ADSL 2 Annex M)
The main difference between this specification and ITU G.992.5 (ADSL2+) is that the upstream/downstream frequency split has been shifted from 138kHz up to 276kHz, allowing upstream bandwidth to be increased from 1 Mbit/s to 3.5 Mbit/s.
ADSL2 Annex L is also known as RE-ADSL2, where 'RE' stands for 'Reach Extended.' With this ADSL standard, the power of the lower frequencies used for transmitting data is boosted up to increase the reach of this signal up to 7 kilometers (23,000 ft). The upper frequency limit for RE-ADSL2 is reduced to 552 kHz to keep the total power roughly the same as annex A. Since RE-ADSL2 is intended for use on long loops there isn't much (any) usable bandwidth above 552 kHz anyway. Although this standard has been ratified by the ITU, not all local loop network maintainers allow this protocol to be used on their network. |
