FAQ: Do I really need to use line filters?

You need to have one between each non-ADSL device and the telephone line. That means one plugged in behind each 'audio' device (phone, fax, analog modem, answering machine, whatever).

If you have a few devices on the same phone socket, you can protect both of them with a single filter, using double adaptors or similar approaches.

You can also choose a 'Central Filter/Splitter', which has three connections (one to Telstra, one to your ADSL device, and one to supply your non-ADSL devices). We highly recommend that you get one of these, they come in a 'wire it into your house roof' version, which is designed for a trained and licensed technician to install inside your house wiring so that the sockets around your house are all 'pre-filtered' and you don't need to have filters cluttering up your desks.

In summary:

1. Between every 'audio' device and the wires in the street, there has to be a line filter (You can use a 'central' filter to service multiple audio devices at once, or place individual filters behind each device)
2. Between the ADSL device you use and the wires in the street, there must be no line filter (it has to have an un-filtered path to the world to work)

Consequences of not using a line filter can include the following

1. Line noise in your audio devices
2. The ADSL service failing to work at all, or dropping out whenever you use a phone to make a phone call

Save us all time, service calls, and stress. Use the line filters. Really. And if you want to really have peace of mind, get a central splitter installed.