ZyXEL Communications VES1724-56 User Manual page 108

Chapter 9 VDSL Setup
Table 34 VDSL Line Profile Setup (continued)
LABEL
US0
Rate Adaptive
MIB PSD MASK
DPBO
RFI BAND
Virtual Noise
Add
Cancel
Clear
Name
VDSL2 Profile
SNR Margin
108
DESCRIPTION
Specify whether you want the Switch to automatically activate the upstream band 0
(Allow) or not (Disable) when necessary. Select Allow to have CPE and the Switch use
the upstream band 0 for upstream traffic over long distances. If you select Disable, the
CPE may not able to transmit data over long distances.
This field displays downstream (DS) and upstream (US) rate adaptive settings.
Manual displays if the Switch fixes the transmission rate as the minimum net data rate
and disables transmission rate adjustment. If the attainable speeds cannot match
configured speeds, then the VDSL link may go down or link communications may be
sporadic due to line errors and consequent retransmissions.
AdaptInit displays if the Switch keeps the transmission rate negotiated between the
Switch and CPE devices. It ranges from the configured minimum to the maximum net
data rate based on the initial line condition.
Dynamic displays if the Switch dynamically changes the transmission rate negotiated
between the Switch and CPE devices during initialization as well as during SHOWTIME
status.
SOS displays if the Switch uses the emergency rate adjustment system for immediate
rate adjustment to reduce crosstalk noise.
Click the Modify link to take you to a screen where you can configure detailed rate
adaptive settings.
The MIB PSD mask allows you to further adjust PSD level for tones according to the limit
PSD mask you have configured.
This field displays how many break points are configured for the downstream (DS) and
upstream (US) MIB PSD mask. For example,"DS:4 BP US:5 BP" displays after you have
configure 4 break points for downstream and 5 break points for upstream in the MIB
PSD mask.
Click the Modify link to take you to a screen where you can configure the MIB PSD
mask.
This field displays whether DPBO is enabled or disabled in this profile.
Click the Modify link to take you to a screen where you can configure detailed DPBO
settings.
This field displays the RFI band setting in this profile.
Click the Modify link to take you to a screen where you can configure detailed RFI band
settings.
This field displays whether virtual noise is enabled or disabled in the downstream and
upstream transmissions.
Click the Modify link to take you to a screen where you can configure detailed virtual
noise settings.
Click Add to save the new rule to the switch. It then displays in the summary table at
the bottom of the screen.
Click Cancel to reset the fields to your previous configuration.
Click Clear to clear the fields to the factory defaults.
This field displays the descriptive name for this profile. Click a profile name in this field
to edit that profile.
This field displays the VDSL2 profile(s) applied to a VDSL line profile.
This field displays the configured upstream and downstream signal to noise ration in
decibels.
VES1724-56 User's Guide