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■ For four-wire (dual-pair) G.SHDSL, the interface rate is two times single-pair
rate. For example, if you set single-pair rate to 2,312 kbps, four-wire interface
rate is 4,624 kbps.
■ Because four-wire G.SHDSL interfaces cannot negotiate rate, do not set their
single-pair interface rate to auto mode.
Description Use the
shdsl rate command to set the single-pair interface rate of the SHDSL
interface.
Use the
undo shdsl rate command to restore the default, that is, auto.
In actual applications, likelihood exists that the maximum downlink rate could not
reach the specified rate as restricted by ATU-C and line conditions. If you select the
auto mode, CPE and CO can negotiate a rate commensurate with the current line
condition during the activating process. If fixed rates are set at the two ends, the
two parties negotiate a rate. In case the lower rate between them cannot be
provided, the line could not be activated.
By default, the rate of two-wire G.SHDSL interface is set to auto-negotiation
mode; the single-pair interface rate of four-wire G.SHDSL interface is set to 2,312
kbps (four-wire G.SHDSL interface rate is 4,624 kbps).
Example # Configure ATM 5/0 to operate in the auto-negotiation mode.
<Sysname> system-view
[Sysname] interface atm 5/0
[Sysname-Atm5/0] shdsl rate auto
shdsl snr-margin
Syntax shdsl snr-margin [ current current-margin-value ] [ snext snext-margin-value ]
undo shdsl snr-margin
View ATM (G.SHDSL) interface view
Parameter current-margin-value: Sets a target margin, in the range 0 to 10. During SHDSL
line training, this target margin is considered in addition to the signal-to-noise
ratio (SNR) threshold. A larger margin value means increased link stability and
noise suppression ability.
snext-margin-value: Sets a target margin, in the range 0 to 10. During SHDSL line
training, this target margin is considered in addition to the SNEXT threshold. A
larger margin value means increased link stability and noise suppression ability.
Description Use the
shdsl snr-margin command to set a target margin to signal-to-noise
ratio (SNR).
Use the
undo shdsl snr-margin command to restore the default.