Chapter 3 Adsl Port Setup; Adsl Port Setup Overview; Adsl Standards Overview; Downstream And Upstream - ZyXEL Communications ALC1224 User Manual

3.1 ADSL Port Setup Overview

The web configurator allows you to configure settings for profiles and individual ADSL ports on the line card. See
Chapter 4 Virtual Channel Management for information on configuring virtual channels and virtual channel

profiles.

3.2 ADSL Standards Overview

STANDARD
G.dmt (ALC1224-71)
G.dmt Annex B (ALC1224-73)
ETSI (ALC1224-73)
ANSI T1.413 issue 2 (ALC1224-71)
1
ADSL2
2
ADSL2+

3.3 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.
3.4 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 latency mode and upstream/downstream latency
delay, 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.
1
These are the rates that the ALC1224 supports for the standards at the time of writing.
2
At the time of writing ADSL2+ is not a standard.
ADSL Port Setup
This chapter explains how to configure the line card's ADSL ports.

Table 3-1 Maximum Transfer Rates of the ADSL Ports

8160 Kbps
8160 Kbps
8160 Kbps
8160 Kbps
12000 Kbps
25000 Kbps
ADSL Port Setup
MAXIMUM DOWNSTREAM
ALC1224 User's Guide
Chapter 3
MAXIMUM UPSTREAM
1024 Kbps
1024 Kbps
1024 Kbps
1024 Kbps
1200 Kbps
1200 Kbps
3-1