SMC Networks TigerAccess SMC7816M - Manual (Page 751)

D
ISPLAYING
VDSL I
NFORMATION
29-69
Command Usage
• Use this command without the interface parameter to display the
predefined PSD mask used for all VDSL ports on the switch, or with
an interface to display it used for a specific port.
• Refer to Table 29-6, “PSD Mask Options,” on page 29-17 for a list
of the PSD mask options supported by this switch.
Example
This example shows that the PSD mask defined in Annex F of ITU-T
G.993.1 is being used for Port 1.
Related Commands
lre psd-mask-level (29-16)
show lre pbo-config
This command displays the mask used to reduce the power spectral density
(PSD) of transmitted signals at specified frequency breakpoints.
Command Mode
Privileged Exec
Command Usage
• Upstream power back-off (UPBO) is used to mitigate far-end
crosstalk caused by upstream transmissions from shorter to longer
loops, thereby ensuring that the upstream signals passing between
short to long loops are compatible.
• The lre pbo-config command (page 29-18) is used to reshape the
PSD by reducing the power spectral density (PSD) of transmitted
signals at specified frequency breakpoints. (Note that the breakpoint
frequencies are expressed in units or 1000 decibels.)
Console#show lre psd-mask-level 1/1
PSD Mask Level : ANNEX F
Console#