ZyXEL Communications VES-1012 - Guia do Utilizador descarregar pdf (Página 51)

VES-1000 Series Ethernet Switch

Port Setup 6-1

Chapter 6

Port Setup

This chapter explains how to configure individual ports on the various line cards.

6.1 Port Setup Overview

The web configurator allows you to configure settings for individual ports on the card.

6.2 Flow Control

IEEE 802.3x flow control manages the sending of traffic so the sending device does not transmit more than the

receiving device can process. This helps prevent traffic from being dropped and having to be resent.

6.3 VDSL Mode

Each VDSL mode operates in a different frequency band allocation, resulting in different upstream and downstream

speeds. The following table summarizes transmission speeds and frequency ranges for each VDSL mode supported

by the VES-1000 Series switch.

Table 6-1 VDSL Mode, Frequency Ranges and Speeds

VDSL

MODE

FREQ.

RANGE (HZ)

LINE SPEED (MBPS)

10 BASE-S

Upstream 4.0M 7.9M 1.56 6.25 9.38 12.50 18.75

Downstream 900K 3.0M 4.17 6.25 8.33 12.50 16.67

ANSI/ETSI

PLAN 998

Upstream 4.0M 5.0M 1.56 3.13 6.25

Downstream 900K 3.0M 4.17 6.25 8.33 12.50 16.67

ETSI PLAN

997

Upstream 4.0M 5.0M 1.56 3.13 6.25

Downstream 900K 2.7M 4.17 6.25 9.38 12.50

SPECIAL

MODE

Upstream 4.0M 7.9M 0.78 1.04 1.17 1.56 2.08 3.12 4.16 4.68 6.25 8.33 9.37 12.5 18.75

Downstream 900K 3.0M 0.78 1.04 1.17 1.56 2.08 3.12 4.16 4.68 6.25 8.33 9.37 12.5 16.66

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