ADC SWD4573I1 Manuale Utente

ADSL line profiles contain a preconfigured set of parameters, including the transmit rate, rate 
adaptation mode, target margin, and interleave delay. ADSL port configuration requires you to 
apply an ADSL line profile to the line, therefore you must configure the desired ADSL line 
profile before configuring the ADSL port. A default profile exists with an index of 1. You 
cannot delete the default profile.

You configure ADSL line profiles from the 

::line=>

 prompt. From the 

::root=>

 prompt, 

type the following command then press 

 to display the 

::line=>

 prompt.

From the 

::line=>

 prompt, type the new command in one of the following formats then press 

 to create a new ADSL line profile. The profile is automatically assigned the next 

available index number in the ADSL line profile table. 

new fixed <margin> <upstream delay> <downstream delay> <maximum

upstream rate> <maximum downstream rate>

new adaptive <margin> <upstream delay> <downstream delay>

<maximum upstream rate> <maximum downstream rate> <minimum

upstream rate> <minimum downstream rate>

(fixed|adaptive)

The form of transmit rate adaptation. Options:

fixed—The loop must be able to come up at the specified maximum upstream rate, or it 
does not come up at all.

adaptive—The loop will come up at the highest achievable rate that is greater than the 
specified minimum upstream rate but less than the maximum upstream rate. This 
adaptation occurs at startup only.

<margin>

The upstream target signal-to-noise margin in decibels that the modem must achieve with 
a BER of 10

-7

 or better to successfully complete initialization. The margin value is typically 

6. A lower margin may result in a higher data rate, but increases noise on the line.