Advanced Setup
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No Retrain: In this mode the router will try to establish a connection as in normal mode, but once the connection is up it will not retrain if the signal is lost.
L3: Puts the router into the L3 power state.
Select a test mode and click on Apply. Then click on Tone Selection.
Tone Selection
To view the ADSL Tone Settings screen, click on the Tone Selection button of the DSL Advanced Settings screen (see Figure 66).
The frequency band of ADSL is split up into 256 separate tones, each spaced 4.3125 kHz apart. With each tone carrying separate data, the technique operates as if 256 separate modems were running in parallel. The tone range is from 0 to 31 for upstream and from 32 to 255 for downstream.
Do not change these settings unless so directed by your ISP.
Figure 67: Tone Settings
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