Juniper NETWORK AND SECURITY MANAGER 2010.4 - ADMININISTRATION GUIDE REV1 Administration Manual page 192

Network and Security Manager Administration Guide
142
For devices that use a PPPoA connection to the Internet, you can predefine the
following ADSL parameters:
VPI/VCI Pair. The Virtual Path Identifier and Virtual Channel Identifier (VPI/VCI)
identify the virtual circuit on the DSLAM.
Multiplexing Mode, also known as the ATM encapsulation method. The
multiplexing mode defines how the ADSL interface handles the multiple protocols
on the virtual circuit. Your service provider must tell you the type of multiplexing
used on the ADSL line.
Virtual Circuit (VC)-based multiplexing carries each protocol over a separate
ATM virtual circuit.
Logical Link Control (LLC) carries several protocols to be carried on the same
ATM virtual circuit. This option is the default for the ADSL1 interface on the
NetScreen-5GTADSL security device.
RFC1483 Protocol Mode. RFC 1483 describes methods of transporting bridged or
routed protocol data units (PDUs) over AAL5 links.
Bridged PDUs do not require the overhead of IPSec processing, thus allowing
more usable bandwidth to be available for data traffic. Because non-IPSec traffic
is not secured at the IP packet layer, you should use this mode only with a private
virtual circuit (the service provider assigns a static IP address for the ADSL
interface).
Routed PDUs enable the NetScreen-5GT ADSL device to exchange routing
information with another router through the ADSL interface.
ADSL Operating Mode. The operating mode defines the physical line attributes
for the ADSL interface.
Auto Detect (default mode) enables the ADSL interface to automatically negotiate
the operating mode with the service provider DSLAM.
ANSI T1.413 Issue 2 Mode
ITU G.992.1 Mode enables the ADSL interface to use the International
Telecommunications Union (ITU) G.dmt standard, which supports minimum data
rates of 6.144 Mbps downstream and 640 Kbps upstream.
G.Lite Mode enables the ADSL interface to use the ITU 992.2 standard, which
supports maximum data rates of 1.536 Mbps downstream and 512 Kbps upstream.
Alternatively, you can ask the onsite administrator to specify these parameters
during configlet installation.
If you don't know the ISP environment or the environment has location-specific
networking requirements, prompt the onsite administrator to configure the ISP
environment during configlet installation.
Specify the password for the configlet, or use the default device password (which is
6.
netscreen ).
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