Zyxel IES-6000 [209/1156] Adsl standards overview

Zyxel IES-5106 [209/1156] Adsl standards overview
Management Switch Card User’s Guide 209
CHAPTER 10
Subscriber Port Setup Screens
This chapter explains how to configure settings for individual subscriber ports. It also covers how to
configure permanent virtual circuits.
10.1 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.
10.2 VDSL Parameters
The following sections introduce some VDSL parameters.
10.2.1 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.
10.2.2 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.
Table 91 ADSL Standards Maximum Transfer Rates
STANDARD MAXIMUM DOWNSTREAM MAXIMUM UPSTREAM
G.dmt 8160 Kbps 1024 Kbps
ANSI T1.413 issue 2 8160 Kbps 1024 Kbps
G.lite 1536 Kbps 512 Kbps
ADSL2 12000 Kbps 1200 Kbps
ADSL2 Annex M 12000 Kbps 2400 Kbps
ADSL2+ 25000 Kbps 1200 Kbps
ADSL2+ Annex M 25000 Kbps 2400 Kbps

Содержание

Скачать
Случайные обсуждения

Ответы 1

Потребляемая мощность?
4 года назад

Ответы 0

Мантаж аппаратуры.
4 года назад