US Robotics ADSL Ethernet Modem Overview page 9

with your user name.
Logical Link Control allows multiple protocol
LLC running over one virtual circuit with a little bit more
overhead.
Virtual Circuit Multiplexer (null encapsulation)
VCMUX allows only one protocol running per virtual circuit
with less overhead.
Enable Network Address Port Translation allows multiple
NAPT computers to share a single WAN IP Address
Challenge Handshake Access Protocol encrypts
CHAP the password through a DES/MD5 algorithm which
provides more security.
Use Plain-text As Password format for a lesser
PAP
security.
Create a new PPPoA Connection
1. Enter the correct numbers in the VPI and VCI fields.
2. Select the appropriate encapsulation - LLC or VCMUX.
3. Select Enable NAPT if an Internet connection will be shared
among multiple computers.
4. Enter the User name, Password and Authentication – CHAP
or PAP.
5. Click Add. This will create a new VPI/VCI connection. Up to
eight VPI/VCI connections can be set.
6. Click OK to save the settings.*
Note: If you are setting the NAPT inbound server, please refer to the
LAN Settings section of this manual for more configuration instructions.
Modify a PPPoA Connection
1. Select one VPI/VCI pair from the Connection List.
2. Modify the numbers in the VPI and VCI fields and select the
appropriate encapsulation - LLC or VCMUX.
3. Select Enable NAPT if an Internet connection will be shared
among multiple computers.
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4. Enter the User name, Password and Authentication – CHAP
or PAP.
5. Click Modify.
6. Click OK to save the settings.*
Delete a PPPoA Connection
1. Select a VPI/VCI pair from the Connection List.
2. Click Delete.
3. Click OK to save the settings.*
Note: After you click OK, you will be prompted to save your settings.
Make sure you are finished making all your changes before you save
your settings. When you are finished making your changes, click Save .
Configure PPPoE Mode
Click the PPPoE button to use PPP over Ethernet connection mode.
PPP is a single link or multi-link interface between two packet switching
devices, such as a router or bridge. PPP is an efficient conduit for
multiple protocols such as IP and IPX, which are encapsulated across
the communications datalink. PPP over Ethernet is PPP frames that are
carried over standard 802.3 Ethernet frames over ATM.
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