PLANET ADE-3100 - Manual (Page 15)

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PPP Half Bridge: Although the Router mode is capable of terminating the PPP in the
modem and hence does not require PPPoE client software on the host PC, there are
some disadvantages to Router mode when only single-user support is required. For
instance, Router mode uses NAT which requires ALG support. PPP Half Bridge also
terminates the PPP in the modem and does not require a PPPoE client on the PC.
However, PPP Half Bridge does not use NAT and is not limited by ALGs. PPP Half Bridge
will work with Ethernet interface to the PC.
Single-User Mode: Only one computer is connected at the LAN side through Ethernet.
Multi-User Mode: Multiple computers are connected at the LAN side through Ethernet.
5.2 WAN Configuration
The WAN configuration page allows you to set the configuration for the WAN/ADSL
ports. Before you enter the WAN Configuration page, you will be asked to select an
adapter (PVC0 through PVC7) first. Once you select the adaptor, then following page will
appear.
Virtual Circuit: Select Enable to activate the current PVC configuration. The current
PVC is displayed at the top of the page in parenthesis. Default is Enabled for PVC0 and
Disabled for PVC1-PVC7.