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Configuring the ADSL Line Interfaces
Configuring ATM ADSL-DMT interfaces
requested bit rate was too high. The line does not use a higher bit rate, even if it can
support one.
For details about specifying bit rates, see "Fast and interleaved bit-rate parameters" on
page 7-7. For information about defining acceptable noise margins, see "Noise margin
parameters" on page 7-10.
The following parameters in the Line-Config subprofile, shown with default values,
define how rate adaptation operates on the line:
[in AL-DMT/{ any-shelf any-slot 0 }:line-config]
rate-adapt-mode-up = automatic-at-startup
rate-adapt-mode-down = automatic-at-startup
rate-adapt-ratio-up = 100
rate-adapt-ratio-down = 100
Parameter
rate-adapt-mode-up
rate-adapt-mode-down
rate-adapt-ratio-up
rate-adapt-ratio-down
Power-level parameters and power spectral density (PSD)
Maximum aggregate power level is the maximum output power allowed on the line
at the transmitter output. This value is expressed in decibels with reference to one
milliwatt (dBm), where 0 (zero) dBm equals 1 milliwatt. It is defined for both
directions. If you lower the default value, the line consumes less power and has less
capacity. The default value is the maximum allowed setting.
Power spectral density (PSD) is the power of a signal per unit of frequency. In the
Line-Config subprofile, the max-power-spectral-density parameter specifies the PSD
allowed on the line at the transmitter output, expressed in dBm/Hz. It is defined for
the downstream direction only, with a valid range of -34 to -52 in even-number
increments. If you lower the value from its default value of -40, the line consumes
less power but also has a lower capacity. Increasing the value can boost the PSD to
achieve a higher capacity.
7-6
Setting
Specifies the rate-adaptive mode for upstream training.
The default is automatic-at-startup. With the setting
operator-controlled the line trains upstream using a
constant planned bit rate. The dynamic setting is not
currently supported.
Specifies the rate-adaptive mode for downstream
training. The default is automatic-at-startup. With the
setting operator-controlled, the line trains downstream
using a constant planned bit rate. The dynamic setting is
not currently supported.
Not currently supported. Ratio for distributing the excess
upstream bit rate among the fast and interleaved
channels when dual latency is supported.
Not currently supported. Ratio for distributing the excess
downstream bit rate among the fast and interleaved
channels when dual latency is supported.
Stinger® MRT Getting Started Guide
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