ADSL2+ speeds explained

We push the envelope when it comes to broadband speeds. We built a network to bring stuff to your screen faster, but the question we get asked more than anything is "how fast will it download?"

ADSL2+ explained

First of all, ADSL and broadband are essentially the same thing. Most people will use the two terms interchangeably to refer to high speed Internet that is delivered over a phone line. Technically "broadband" can refer to many different types of Internet connections including cable, ISDN and other transmission methods. But here we are referring to ADSL broadband over your phone line.

ADSL2+ is the technology we use on our iiNetwork. While ADSL1 download speeds typically finish at 1500-8000kbps, ADSL2 finishes at 12,000kbps and ADSL2+ can reach up to 24,000kbps!.

Factors which affect speed

Broadband speeds are difficult to nail down. As broadband travels from your telephone exchange to your home it goes through a number of impact points that affect the final speed you experience.

Our ADSL2+ plans deliver a smoother and more satisfying online experience with download speeds typically much faster than standard ADSL. More than half of our ADSL2+ customers experience download speeds in excess of 10,000kbps with a small percentage clearing 20,000kbps, up to 24,000kbps.

The exact speed you get varies depending on factors such as:

  • the length of your phone line to the exchange;
  • Internet traffic congestion;
  • the quality of your line;
  • signal strength;
  • the number of joins in your line;
  • the speed of the websites you visit; and
  • factors within your home such as unfiltered devices and lengthy phone cords.

In addition, not all ADSL modems/routers are capable of ADSL2+ speeds. If you have an older modem, it may not be ADSL2+ compatible, so we always advise that you check the manufacturer’s website to make sure. If you are an existing customer, you can purchase new ADSL2+ hardware through Toolbox.

Check out the map below of the Sydney metropolitan area from 2008:

Combined ADSL2+ Speed Distribution Map - Sydney

What this map shows is the average speed the combined iiNet and Internode customer experiences in areas covered by both the iiNet and Internode ADSL2+ networks.

The dots you see are telephone exchanges that have DSLAMs installed.

The red splotches surrounding each exchange in this map indicate customers getting ADSL2+ broadband speeds in excess of 12Mbps. As the colours move through orange, yellow and grey, the speed decreases.