Draytek Vigor IPPBX 2820 Series User Manual page 204

ISP Access Setup
IP Address From ISP
value is set by telnet command.
Enter your allocated username, password and authentication
parameters according to the information provided by your ISP.
If you want to connect to Internet all the time, you can check
Always On.
Username – Type in the username provided by ISP in this
field.
Password – Type in the password provided by ISP in this
field.
PPP Authentication – Select PAP only or PAP or CHAP for
PPP.
Idle Timeout – Set the timeout for breaking down the Internet
after passing through the time without any action. This setting
is active only when the Active on demand option for Active
Mode is selected in WAN>> General Setup page.
Usually ISP dynamically assigns IP address to you each time
you connect to it and request. In some case, your ISP provides
service to always assign you the same IP address whenever
you request. In this case, you can fill in this IP address in the
Fixed IP field. Please contact your ISP before you want to use
this function.
WAN IP Alias - If you have multiple public IP addresses and
would like to utilize them on the WAN interface, please use
WAN IP Alias. You can set up to 8 public IP addresses other
than the current one you are using. Notice that this setting is
available for WAN1 only. Type the additional WAN IP
address and check the Enable box. Then click OK to exit the
dialog.
Fixed IP – Click Yes to use this function and type in a fixed IP
address in the box of Fixed IP Address.
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VigorIPPBX 2820 Series User's Guide