DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
2-2 Basic Installation and Configuration
v1.0, April 2007
7. Set up your VPN connections using Auto Detect. If you do not know your ISP connection,
Auto Detect will attempt to automatically detect your connection type by probing for different
connection methods. If you know your ISP type, you can set up your connections m anually.
(Ensure that you have the ISP information relevant to your connection type before you begin .
Using ADSL Microfilters (optional)
ADSL technology uses the same wires as your telephone service. However, ADSL adds signals to
the telephone lines which create noise in the te lephone service. You must use ADSL microfilters to
filter out these signals before they reach your telephone. If you are planning on using the ADSL
modem port, and an ADSL Microfilter is not included with your ProSafe DGFV338, you should
acquire one.
There are two types of ADSL Microfilters: a one-line filter and a two-line filter with splitter.
•One-Line Microfilter. A simple microfilter provides an interface filter between your
telephone and the phone jack as shown in Figure 2-1. Each device such as a telephone, fax
machine, answering machine, or caller ID display requires an ADSL microfilter..
You can also connect the one-line filter to a phone-jack splitter to allow for connection of the
wireless firewall. However, the phone-jack splitter must be a designated ADSL microfilter/
phone jack splitter.
• ADSL Microfilter with Built-In Splitter. Use an ADSL microfilter with built-in splitter
when there is a single wall outlet which must provide connectivity for both the wireless
firewall and the telephone equipment.
Figure 2-1
Figure 2-2