ZyXEL Communications ALC1024, User Manual

Page: 59 / 255

Commands with EEC
ADSL Commands 5-1
Chapter 5
ADSL Commands
The ADSL (Asymmetrical Digital Subscriber Line) subsystem allows you to configure and monitor the
line card’s ADSL ports.
5.1 ADSL Standards Overview
The line card supports both the G.lite and the G.dmt standards. G.lite is intended to minimize the cost for the
consumer market.
Table 5-1 Maximum Transfer Rates of the ADSL Ports
STANDARD MAXIMUM DOWNSTREAM MAXIMUM UPSTREAM
G.dmt 8160 Kbps 1024 Kbps
G.dmt Annex B 8160 Kbps 1024 Kbps
G.lite 1536 Kbps 512 Kbps
ANSI T1.413 issue 2 8160 Kbps 1024 Kbps
5.2 Downstream and Upstream
Downstream refers to traffic going out from the line card to the subscriber’s ADSL modem or router. Upstream
refers to traffic coming into the line card from the subscriber’s ADSL modem or router.
5.3 ATU-C and ATU-R
ATU-C stands for ADSL Termination Unit-Central and refers to the line card or the traffic going out from one of
the line card’s ADSL ports. ATU-R stands for ADSL Termination Unit –Remote and refers to the subscriber’s
ADSL modem or router or traffic coming into the line card from the subscriber’s ADSL device.
5.4 Profiles
A profile is a table that contains a list of pre-configured ADSL settings. Each ADSL port has one (and only one)
profile assigned to it at any given time. The profile defines the maximum and minimum upstream/downstream
rates, the target upstream/downstream signal noise margins, and the maximum and minimum
upstream/downstream acceptable noise margins of all the ADSL ports that have this profile. You can configure
multiple profiles, including profiles for troubleshooting.
Profiles allow you to configure ADSL ports efficiently. You can configure all of the ADSL ports with the same
profile by modifying the profile, thus removing the need to configure the ADSL ports one-by-one. You can also
change an individual ADSL port by assigning it a different profile.