Filters eliminate noise on the telephone line caused by your ADSL modem. A microfilter is required on each telephone extension that is not connected to the ADSL modem. FLOW will provide a maximum of three (3) free filters. You may purchase additional filters from FLOW.
Yes, as with any Internet connection security should be taken seriously. FLOW recommends that you install a personal firewall for your security. A firewall may be purchased locally or downloaded from the Internet. It is your responsibility to determine what is best for you.