Internet 'dumping' is when someone takes control of your computer's modem to place calls to high-cost premium rate or international numbers.

This can be achieved by inducing users (often by promising adult content) to download new Internet dialler software, replacing their ISP connection.

Proving that dumping is conducted without the user's knowledge can often be difficult.

To prevent dumping, ask your telecommunications company to place a bar on all premium calls starting with 190 (e.g. 1900, 1901, 1902, etc.) and on international phone services.

If the problem persists, then you can lodge a complaint with the Telecommunications Industry Ombudsman at www.tio.com.au.

If your business PCs are not equipped with modems, dumping should not be a problem for you.