User`s guide

ADSL/VoIP Gateway User’s Guide
63
12 Internet Access
This chapter describes how to configure the way that your
device connects to the Internet. Your ISP determines what type
of Internet access you should use and provides you with any
information that you need in order to configure the Internet
access to your device.
Your device needs the following address information in order to
access the Internet:
IP address and
subnet mask:
The IP address and subnet mask
assigned to your WAN interface.
Default gateway: The gateway address that identifies the
ISP server through which your Internet
connection will be routed.
DNS servers: The Dynamic Name System (DNS)
servers used by your ISP to dynamically
assign addresses to each of the
computers attached to your LAN.
In most cases, you will not need to configure your device with
these addresses because your ISP is likely to use an Internet
access type which automatically assigns addresses to your
device. For more information, see Types of Internet Access on
page 63.
Types of Internet Access
The types of Internet access available are as follows:
• Automatic Internet access – your device scans the Internet
via the DSL connection in order to find a link to the ISP’s
Internet service. The IP addresses required to access your
ISP’s Internet service are automatically configured.
• PPP Internet access – your device uses a Point to Point
Protocol (PPP) to carry data between your ISP and your
computer. To use PPP Internet access, you must enter a
PPP login username and password the first time to log
on. The IP addresses required to access your ISP’s
Internet service are automatically configured.
Your device supports two types of PPP – PPPoE (over
Ethernet) and PPPoA (over ATM).
• DHCP – your ISP uses a protocol called Dynamic Host
Configuration Protocol (DHCP) to assign addresses and
manage your device. The device is automatically assigned
the IP addresses that it needs to access the Internet.
• Manual – you manually assign the addresses that your
device needs in order to access the Internet. Your ISP
should provide you with the necessary addresses.