SMC Networks TigerAccess SMC7816M Uživatelský manuál stáhnout pdf (Strana 751)

100

101

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#

1 2 ... 746 747 748 749 750 751 752 753 754 755 756 ... 961 962

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