Specifications

ASMi-52 Installation and Operation Manual Chapter 4 Managing ASMi-52 via a Terminal
Configuring the Physical Ports 4-27
ASMi-52
Snext margin (Disable Snext margin)
1. -10 12. 1
2. -9 13. 2
3. -8 14. 3
4. -7 15. 4
5. -6 16. 5
6. -5 17. 6
7. -4 18. 7
8. -3 19. 8
9. -2 20. 9
10. -1 21. 10
11. 0 22. Disable Snext margin
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ESC-prev.menu; !-main menu; &-exit; @-scroll
Figure 4-30. Snext Margin Menu
Configuring the Current Margin
The current margin indicates the minimum desired target margin for the local line
conditions during the startup sequence. This setting is available only if the rate
adaptation is enabled (see the line probing configuration below).
Disabling the current margin parameter allows the use of all line rates, regardless of
line condition.

To configure the current margin:
1. From the SHDSL Port Configuration menu, select Current margin.
The Current Margin menu appears. The display is identical to the Snext
Margin menu, except for its title (see Figure 4-30).
2. Select the current margin by typing the number corresponding to the desired
value, and press <Enter>.
SHDSL Port Configuration menu appears.
3. Select Save to save the changes.
Configuring the Power Spectral Density
By configuring the power spectral density, you define the amount of power applied
to the spectrum of frequencies that carry the information signal in order to achieve
a satisfactory level of signal strength at the receiving end of the circuit.
The power spectral density can be configured for the ASMi-52 units with the line
probing set to fixed.
The power spectral density value depends on the selected modems compatibility:
Annex A or Annex B. The possible values are:
• Symmetric, supported in both Annex A and Annex B modes.
• Asymmetric, supported in Annex A at 768 kbps and in Annex B at 2048 kbps.
Note