Special Speed reports»
TrueNet's nationwide network of broadband probes (testing units) provides us sufficient data measurements to give reliable comment on throughput speed, i.e. the time it takes to download a file from a website such as a document or a song. The latest results for the first part of November show the "Throughput Speed" by area using data results from our test probes with full speed ADSL services.
Performance of ADSL is dependent on the distance between a user's modem and the DSLAM they are connected to.
The DSLAM (Digital Subscriber Line Access Modulator), is actually another modem at the opposite end of the copper wires connected to your house. The DSLAM equipment includes many modems, one for every user modem connected to a copper pair in the network.
There are guidelines on the "ideal" speed for any distance between the modem in a DSLAM and one in the home. TrueNet is the first to measure such performance in New Zealand, and the results are graphed below.
This article is intended to be of interest to technical specialists, more of an academic exercise for interest. We would appreciate comments.
TrueNet conducted a trial of a 5MB file downloaded to identify how long it takes before the maximum speed of a connection to be reached. The test involves downloading a file and measuring the speed of each decile (10%). The results for each tester were all over the place, some reached the maximum in the second decile, while others took until the 7th decile to reach the maximum.