Subscriber Port Setup Screens; Adsl Standards Overview; Vdsl Parameters; Psd - ZyXEL Communications MSC1024G Series User Manual

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H A P T E R

Subscriber Port Setup Screens

This chapter explains how to configure settings for individual subscriber ports. It also covers
how to configure permanent virtual circuits.

11.1 ADSL Standards Overview

These are the ADSL standards and rates that the ADSL line card supports at the time of
writing. The actual transfer rates will vary depending on what the subscriber's device supports,
the line conditions and the connection distance.
Table 76 ADSL Standards Maximum Transfer Rates
STANDARD
G.dmt
ANSI T1.413 issue 2
G.lite
ADSL2
ADSL2 Annex M
ADSL2+
ADSL2+ Annex M

11.2 VDSL Parameters

The following sections introduce some VDSL parameters.

11.2.1 PSD

PSD (Power Spectral Density) defines the distribution of a VDSL line's power in the
frequency domain. A PSD mask is a template that specifies the maximum allowable PSD for a
line.

11.2.2 Limit PSD Mask

To reduce the impact of interference and attenuation, ITU-T 993.2 specifies a PSD mask to
limit the VDSL2 transmitters PSD at both downstream and upstream.
MSC1000G/1024G/1224G Series User's Guide
MAXIMUM DOWNSTREAM
8160 Kbps
8160 Kbps
1536 Kbps
12000 Kbps
12000 Kbps
25000 Kbps
25000 Kbps
11
MAXIMUM UPSTREAM
1024 Kbps
1024 Kbps
512 Kbps
1200 Kbps
2400 Kbps
1200 Kbps
2400 Kbps
209