ZyXEL P-661HW-61 User Guide - Page 22
Internet Access
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Chapter 1 Introduction 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 LAN WAN DSL 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 22 P-661HNU-Fx User's Guide