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Installation and Operation Manual Chapter 4 Configuration
ASMi-52 Ver. 2.5 Configuring the Physical Ports 4-23
ASMi-52
SHDSL remote port configuration
Transmission mode (Annex_AB)
Asym PSD (Asym/Sym Enable)
Line prob (Adaptive rate)
1. Power backoff (Enable)
2. Snext margin (Disable Snext margin)
3. Current margin (Disable current margin)
4. Loop attenuation threshold (dB)[0–127] (0)
5. SNR margin threshold (dB)[0–15] (0)
6. Save
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ESC-prev. menu; !-main menu; &-exit; @-scroll
Figure 4-28. SHDSL Remote Port Configuration Menu
Configuring the Power Backoff
You can determine if the transmitted power backoff is used.
To configure the use of the power backoff:
1. From the SHDSL Local Port/SHDSL Remote Port menu, select Power backoff
(Main menu > Configuration > SHDSL Configuration > SHDSL Local
Port/SHDSL Remote Port > Power Backoff) (see Figure 4-27 and Figure 4-28)
to enable or disable power backoff.
The display is refreshed and a new value appears.
2. Select Save to save the changes.
•
• After changing the Configured Wire option, ASMi-52 must be reset to implement
the change.
• When operating in Line prob. Adaptive rate, and the clock is internal, the rate is
limited up to 2048 bps.
Configuring the Snext Margin
The Snext margin indicates the minimum required target margin with a worst-case
self next noise model given the current loop insertion (49 SHDSL next is
considered the worst case). This setting is available only if the rate adaptation is
enabled (see the line probing configuration below).
•
Disabling the Snext margin parameter allows the use of all line rates, regardless of
line condition.
To configure the Snext margin:
1. From the SHDSL Remote Port menu, select Snext margin (Main menu >
Configuration > SHDSL Configuration > SHDSL Remote Port > Snext
Margin).
The Snext Margin menu appears (see Figure 4-29).
Note
Notes