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See the table below for a description of the parameters.
Parameter
Protocol
VPI/VCI
Description
•
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.
•
PPPoA: Point-to-Point Protocol over ATM is a method
of encapsulating data for transmission to a far point.
•
1483 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 VoIP Router at the head end).
•
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 do IP routing with NAT enabled.
See 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.
WAN
4-23
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