R2511-HP MSR Router Series Interface Command Reference(V5)

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Views
ATM (G.SHDSL) interface view
Default command level
2: System level
Parameters
auto: Automatically tunes the transmit power.
value: Power backoff (PBO) value (in dB), which restricts the transmit power. The value range for this
argument is 0 to 6.
Usage guidelines
A G.SHDSL interface automatically tunes its transmission power according to the line noise to ensure an
appropriate signal-to-noise ratio. However, when the line noise is known, or when the
automatically-tuned value is inaccurate, use this command to manually tune the transmission power.
Examples
# Set the tunable value of G.SHDSL interface ATM 1/0’s transmission power to 20 dB.
<Sysname> system-view
[Sysname] interface atm 1/0
[Sysname-Atm1/0] shdsl pbo 20
shdsl psd
Use shdsl psd to set PSD of the G.SHDSL interface working as CPE.
Use undo shdsl psd to restore the default.
Syntax
shdsl psd { asymmetry | symmetry }
undo shdsl psd
Default
The PSD of the G.SHDSL interface is in symmetric mode.
Views
ATM (G.SHDSL) interface view
Default command level
2: System level
Parameters
asymmetry: Specifies the asymmetric mode, where different power spectral densities (PSD) are set for the
central office (CO) and the Customer Premises Equipment (CPE).
symmetry: Specifies the symmetric mode, where the same PSD is set for the CO and CPE.
Usage guidelines
PSD is the amount of power per unit (density) of frequency (spectral) as a function of the frequency. PSD
describes how the power of a time series is distributed with frequency.
Examples
# Set the PSD of G.SHDSL interface ATM 1/0 to asymmetric mode.