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ATM Interface
Clicking on the ATM VC brings up the following screen. The router uses ATM as its WAN interface. Protocols
including 1483 Routing, 1483 Bridging, MAC Encapsulated Routing (MER), PPPoA and PPPoE with LLC-SNAP and VC-
MUX encapsulations are supported for each ATM PVC.
When you have finished entering your connection parameters, click ‘SAVE SETTINGS’. You can verify that you
have established an ADSL connection by clicking ‘Status’ at the bottom of the left-hand menu.
See below for a description of the parameters.
Parameter Description
Protocol
Disable:
Disables the connection
1483 Bridging:
Bridging is a standardized layer
2 technology. It is typically used in corporate
networks to extend the physical reach of a single
LAN segment and increase the number of stations
on a LAN without compromising performance.
Bridged data is encapsulated using the RFC1483
protocol to enable data transport. Please note
that setting the router to bridged mode disables
all advanced features such as VoIP, Firewall, and
QoS, etc
PPPoA:
Point-to-Point Protocol over ATM is a
method of encapsulating data for transmission to
a far point
1
483 Routing:
1483 Routing allows a simple, low-cost
connection to the Internet via a standard Ethernet
port. The router looks up the network address for
each packet seen on the LAN port. If the address
is listed in the routing table as local, it is filtered.
If the address is listed under the ADSL port, it is
forwarded. Or if the address is not found, then it is
automatically forwarded to the default router (i.e.,
the router at the head end)
1.
2.
3.
4.
PPPoE:
Point-to-Point over Ethernet is a common
connection method used for xDSL
MAC Encapsulated Routing:
If your ADSL service
is a Bridged mode service and you want to share
the connection to multiple PC’s, please select MAC
Encapsulated Routing. MER is a protocol that allows
you to do IP routing with NAT enabled
VPI/VCI
Virtual Path Identifier (VPI) and Virtual Circuit
Identifier (VCI). Data flows are broken up into fixed
length cells, each of which contains a Virtual Path
Identifier (VPI) that identifies the path between
two nodes, and a Virtual Circuit Identifier (VCI) that
identifies the data channel within that virtual path.
Each virtual circuit maintains a constant flow of cells
between the two end points.
When there is no data
to transmit, empty cells are sent. When data needs
to be transmitted, it is immediately inserted into the
cell flows.
5.
6.
Chapter 5 :
Advanced Setup
BoB
TM
Advanced Setup Method