Hi FW
Should you want to make an accurate and usable comparison, consider the info below.
You will have to specify the details on which backhaul ISP you are currently using and how / where / which protocol / when you are measuring the bandwidth throughput, as each test facility will deliver vastly different results as the type of test, the location of the servers, peering of different networks, the time of day, shaping by iBurst and the backhual ISP and many other aspects will greatly affect the results…
To establish which backhaul ISP you are using: Ping
www.google.com if it delivers a starting IP of 72 then you are using Verizon as your bandwith carrier and when it delivers a starting IP of 64, you are using Internet Solutions as your bandwith carrier and these will deliver vastly different results both to local and international sites. (Verizon is preferred)
http://www.ispd.co.za/TOOLS/speed_test/results.php - local
http://www.broadband-help.com/tools/speed-test/ - intl
These tests are rarely accurate and most local tests deliver exaggerated results, but generally you could expect an average throughput to the internet of all services / protocols of 250 Kbps (31.25 KB/s) with an iBurst connection, as the tower/user saturation issue comes into play, the RF issues, shaping and the poor availability of international bandwidth on their network.
Note: Even if iBurst advertises their access speed to the internet of 250 Kbps as 1 Mbps it stays 250 Kbps – see ASASA rulings against iBurst. The test located at
http://www.iburst.co.za/default.aspx?link=account_speedtest is good for tweaking your iBurst connection as this will indicate your throughput to the iBurst network and therefore you should achieve a reading higher than 900 Kbps, with a properly configured connection. (when the iBurst network is stable)