User guide

ADSL System description Overview
iMG/RG Software Reference Manual (ADSL Port)
8-2
8.2 ADSL System description
8.2.1 Overview
FIGURE 8-1 ADSL upload interface module
The ADSL port of a Media Gateway can be connected both to an Ethernet DSLAM or to an ATM DSLAM,
observing the figure the connection between the ADSL port and the TCP/IP stack would be done via rfc1483
encapsulation transport in case of an Ethernet DSLAM while will be done using a Point to Point Protocol trans-
port in case of a connection to an ATM DSLAM.
8.2.2 ADSL connection via RFC1483 bridged mode
In order to allow the management of the VLAN directly from the Allied Media Gateway using only one ADSL
PVC (permanent virtual circuit) it is possible to set up an RFC1483 transport attached to the ATI Bridge mod-
ule; ATI Bridge module provides support for virtual VLAN creating a domain, one for each VLAN, in which
RFC1483 bridged transport can carry on frames tagged for each different domain on the Bridge that will corre-
spond to different VLAN the Bridge module provide also standard interfaces for attachment to the system
IP INT ip0
TRANSPORT t1
(Type=Ethernet)
TRANSPORT
pvc_0_35
(Type=RFC1483)
BUN PORT a1
ADSL physical port
TRANSPORT
pvc_1_38
(Type=RFC1483)
BUN PORT a1
IP INT ip_pvc_1_38
ADSL physical port
TRANSPORT
ppoa_transport
(Type=PPP)
BUN PORT a1
IP INT ip_ppoa
ADSL physical port
on ATM DSLAM
qinterface
BRIDGE
IP STACK
BRIDGE IF pvc_0_35_if