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ADSL 2 broadband in technical terms
ADSL2 is also known as ITU G.992.3, which is an ITU (International Telecommunication Union) standard. ADSL2 and ADSL2+ extend the capability of regular ADSL by doubling the number of downstream bits. This can lead to connection speeds of up to 24 Mb downstream and 1Mb upstream, depending on the distance of the DSLAM (DSL Access Multiplexer) from the customer's home.
Local conditions can vary, especially beyond 2km. But the closer you are to the DSLAM the higher your Mbps will be. A DSLAM is a network device that enables telephone lines to have faster connections to the internet. It collects digital signals from its multiple modem ports, and combines them into one signal through a process called "multiplexing".
In this way, the DSLAM allows telephone companies and ISPs to provide fast copper wire internet connection technology (DSL), with the fastest backbone network technology (ATM, asynchronous transfer mode).
How do I get ADSL 2 broadband?
Luckily both ADSL2 and ADSL2+ can run on regular ADSL phone lines, but you may need to upgrade or purchase a new router to get the most out of your new connection.
Who is ADSL2 broadband for?
ADSL2 is great for online gamers, as well as those who want to enjoy music and movie streaming. It's also useful for video conferencing and seamlessly listening to digital radio over the internet. People who use Peer-2-Peer software, (for downloading media), will benefit from the faster speeds that this connection offers.
A new standard for ADSL called ADSL2+ provides extended bandwidth. This follows ITU G.992.5 and provides up to 24Mb/s downstream and 1Mb/s upstream.
A variation of the ADSL2+ specification called Annex M allows up to 24Mb/s downstream and up to 3.5Mb/s upstream. In the UK we cannot achieve the full 3.5Mb/s upstream, as there is a frequency plan that must be followed on all phone lines to avoid interference.
This limits the Annex M uplink. Whilst Annex M is not yet available in the UK we expect it to allow around 2Mb/s uplink.





Telecom Italia had informed us that we were never going to get broadband through our phone line as we live too far from our exchange and it would be too expensive for them to justify installing new phone lines. Telecom Italia actually told us that some of their customers had gone down the satellite broadband route with Italia WiFi and gave us your phone number. We’re SO very happy to finally...