Chapter 52 ADSL Commands

The following example displays the tone diagnostics results for DSL port 8.

Figure 252 Tone Diagnostics Command Example

ras> ad lined toneD 1 port: 1

number_of_subcarries:

512

32

latn:

24.1

2.7

satn:

24.1

61.3

snrm:

30.2

25.0

attndr:

28008000

1248000

farEndActatp:

-31.0

11.9

i

log(dB)

QLN(dBm)

SNR(dB)

0

N/A

N/A

N/A

1

N/A

N/A

N/A

2

N/A

N/A

N/A

3

N/A

N/A

N/A

4

N/A

N/A

N/A

5

N/A

N/A

N/A

6

-21.1

-125.5

17.5

7

-15.3

-124.0

26.0

8

-9.9

-123.0

31.0

9

-5.7

-120.5

38.0

----------------------

Snip

------------------------

509

6.0

-124.0

29.0

510

6.0

-124.0

29.0

511

6.0

-123.0

26.5

The following table lists the tone diagnostic parameters. See the ITU-T’s G.992.3 for more information.

Table 98 ToneDiag Command

LABEL

DESCRIPTION

number_of_

Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-

subcarries

carriers (sub-channels) of 4.3125 KHz each.

 

This number indicates how many upstream and downstream DMT sub-carriers

 

the DSL connection is using.

 

 

hlinScale:

The channel characteristics function is represented in linear format by a scale

 

factor and a complex number. This is the maximum upstream and downstream

 

scale factor used in producing the channel characteristics function.

 

 

latn:

This is the upstream and downstream Line Attenuation (in dB).

satn:

This is the upstream and downstream Signal Attenuation (in dB).

snrm:

This is the upstream and downstream Signal-to-Noise Ratio Margin (in dB). A

 

DMT sub-carrier’s SNR is the ratio between the received signal power and the

 

received noise power. The signal-to-noise ratio margin is the maximum that the

 

received noise power could increase with the IES-612-51A still being able to

 

meet its transmission targets.

 

 

attndr:

This is the upstream and downstream Attainable Net Data Rate (in bit/s).

farEndActatp:

This is the upstream and downstream Far End Actual Aggregate Transmit

 

Power (in dBm)

i

This is the index number of the DMT sub-carrier.

 

369

IES-612-51A User’s Guide