ZyXEL Communications 2002 Series Guide de l'utilisateur Page 53

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VES-1000 Series Ethernet Switch
Port Setup 5-1
Chapter 5
Port
Setup
Configure your VDSL and Ethernet ports in SMT menu 6.
5.1 Port Configuration
Port type (VDSL or Ethernet) is labeled under Type in menu 6. Enter the port index number to configure it.
This menu only shows the number of ports that are available on your particular VES-1000 Series switch. As an
example, the VES-1008A will show eight available ports and the VES-1012 will show twelve available ports.
5.1.1 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 5-1 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
5.1.2 Rate Adaption
You can configure the maximum rate of an individual VDSL port using the port setup SMT menus. However poor
line quality (due to poor wiring, line noise, cross-talk or VDSL modem-to-switch distance) may affect actual
VDSL speeds attainable.
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