Specifications

Chapter 3 Configuration Installation and Operation Manual
3-8 Configuring Physical Layer Parameters of SHDSL Lines ASMi-54C LRS-102 Ver. 2.0
Parameter Function Values
Line Probe Controls the use of line probing per
ITU-T Rec. G.991.2 for the
corresponding line.
Line probing is used to automatically
select the maximum data rate
supported by the line. When enables,
the Payload Rate of the line is
automatically set to 192 kbps, and is
increased when line conditions permit.
This parameter is relevant only when
when TC Layer is 64/65-OCTET
DISABLE – Line probing is disabled. This is the only
option available when TC Layer is HDLC.
ENABLE – Line probing is enabled. Note that line
probing must always be enabled for the REMOTE
mode.
Default: ENABLE
Payload Rate Selects the line payload rate, in kbps.
This parameter is not displayed when
Line Probe is ENABLE
The available selections are 192 to 5696 kbps, in
multiples of 64 kbps (n × 64 kbps, corresponding to
n values in the range of 3 to 89.
Default: 192
Current
Margin(dB)
Specifies the target margin for the
measured signal-to-noise ratio relative
to the current noise level.
Alternatively, line activation may be
performed in accordance with the
Worst Margin value.
This parameter is displayed only when
the Line Probe is ENABLE
To use the signal-to-noise ratio measured
relative to the current noise level during SHDSL
line activation, select the desired value, in the
range of -10 to +21 dB.
To disable the use of the signal-to-noise ratio
measured relative to the current noise level,
select DISABLE.
Default: 0
Worst
Margin(dB)
Specifies the target margin for the
measured signal-to-noise ratio relative
to the reference worst-case near-end
crosstalk noise specified in ITU-T Rec.
G.991.2.
Alternatively, line activation may be
performed in accordance with the
Current Margin value.
This parameter is displayed only when
the Line Probe is ENABLE
To use the signal-to-noise ratio measured
relative to the near-end crosstalk during SHDSL
line activation, select the desired value, in the
range of -10 to +21 dB.
To disable the use of the signal-to-noise ratio
measured relative to crosstalk and use the
signal-to-noise ratio measured relative to the
current noise level, select DISABLE.
Default: DISABLE
Loop
Attenuation
Threshold (dB)
Selects the loop attenuation threshold:
if the attenuation measured on the
SHDSL link exceeds the threshold
value, and alarm is generated
The allowable range is 0 to 127 (the number
specifies the maximum value, in dB).
Default: 0
SNR Margin
Threshold (dB)
Selects the SNR margin threshold: if
the attenuation measured on the
SHDSL link exceeds the specified value,
an alarm is generated
The allowable range is 0 to 15 (the number specifies
the maximum value, in dB).
Default: 0