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Adding ADSL Line Profiles
You add ADSL line profiles from the
1
In the
Rate Mode
The rate mode defines the form of transmit rate adaptation.
be able to come up at the specified maximum transmit rate
at all.
Adapted Rate at Startup
is greater than the specified minimum transmit rate
maximum transmit rate
2
In the
Upstream
This is the noise margin, in decibels/10, that the modem must achieve with a BER of 10
or better to successfully complete initialization. The typical value for the target margin
is 60. A lower target margin may achieve a higher data rate, but increases noise on the line.
3
If you set the
Min Tx Rate
boxes, type the minimum transmit rate for interleave channels in kbps.
Otherwise, skip this step.
This is the guaranteed minimum transmission rate for all lines to which this profile is
applied.
4
In the
Upstream
rate for interleave channels in kbps.
This is the highest transmission rate to which the modem can adapt for all lines to which
this profile is applied.
5
In the
Upstream
milliseconds.
The interleave depth specifies the delay between consecutive bytes. Larger delays result in
improved noise immunity, but increase transmission delay. A depth of 16 milliseconds is
ideal for maximum noise immunity. However, a depth of 4 to 6 milliseconds is
recommended to achieve maximum transmission speeds.
6
Click
Add
to add the ADSL line profile.
Avidia System Configuration and Management User Manual
ADSL Line Profile Table
box, select the desired rate mode (
means the loop will come up at the highest achievable rate that
(Step
4).
and
Downstream Target Margin
Rate Mode
to
Adapted Rate at Startup,
and
Downstream Interleave Max Tx Rate
and
Downstream Max Interleave Depth
Chapter 20: Configuring Subscriber Services
window.
Fixed Rate
or
Adapted Rate at Startup
Fixed Rate
(Step
4), or it does not come up
(Step
3) but less than the specified
boxes, type the target signal-to-noise margin.
in the
Upstream
and
boxes, type the maximum transmit
boxes, type the interleave depth in
).
means the loop must
-7
Downstream Interleave
387
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