ZyXEL Communications P-661H-61, Manual, Page: 22 / 404

Chapter 1 Introduction
P-661HNU-Fx User’s Guide
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1.2.1 Internet Access
Your ZyXEL Device provides shared Internet access by connecting the DSL port to
the DSL/MODEM jack on a splitter or your telephone wall jack.
Computers can connect to the ZyXEL Device’s ETHERNET ports (or wirelessly).
Figure 1 ZyXEL Device’s Internet Access Application
1.2.1.1 3G WAN
The USB port allows you to wirelessly connect to a 3G network to get Internet
access by attaching a 3G wireless dongle. You must leave the DSL port
unconnected and have a 3G wireless dongle attached to use 3G as your WAN. You
can also have the ZyXEL Device use the 3G WAN connection as a backup. That
means the ZyXEL Device switches to the 3G wireless WAN connection if the wired
DSL connection fails. The ZyXEL Device automatically changes back to use the
wired DSL connection when it is available.
Figure 2 Internet Access Application: 3G WAN
You can also configure the firewall on the ZyXEL Device for secure Internet access.
When the firewall is on, all incoming traffic from the Internet to your network is
blocked unless it is initiated from your network. This means that probes from the
LAN
WAN
DSL