C
ONFIGURING

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NTERFACE

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ETTINGS

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VDSL P

ORTS

10-7

Configuring Interface Settings for VDSL Ports
This section describes how to configure communication parameters for
VDSL ports such as specifying data band usage plans, setting notches
within the frequency bands to avoid interference with ham radio signals,
setting a mask for power spectral density to meet regional or local
limitations for transmitting signals on phone lines, setting an acceptable
target for the signal-to-noise ratio, and enabling automatic rate adaptation.
Command Attributes
Buttons in Upper Menu Bar
Interface Port – Port identifier. (Range: 1-16)
Retraining – Manually initiates rate adaptation to find the optimal
transmission rate based on existing line conditions.
Manual retraining can be used if auto-retraining has been disabled on
the VDSL Global Configuration screen (page10-6), and the signal
quality or link on a port has dropped. Retraining initiates rate adaptation
and selects the optimal transmission rate based on existing line
conditions and the bounds set in the Data Rate field.
Note that it might take several minutes to retrain a port.
Shut Down – Shuts down a VDSL port.
This command can be used to disable the VDSL chipset tr ansmitter of a
port that is not connected to a working CPE. In some unusual
circumstances, the power emitted by VDSL ports can affect other
VDSL ports. It is recommended that ports that are not wired to CPEs
be shut down in this way. This command can also be used to disable
access to the switch from this port for troubleshooting or security
reasons.
Start Up – Re-enabled a port that has been previously shut down.
Reset – Resets the VDSL controller chip for the specified VDSL port
A port may need to be reset in order to troubleshoot VDSL connection
or performance problems.