D-link Wireless ADSL2/2+ 4-port Ethernet Router DSL-2640U Manuel d'utilisateur télécharger pdf (Page 31)

The test mode can be selected from the DSL Advanced Settings page. Test modes

include—normal, reverb, medley, no retrain, and L3. After you make your

selections of the test mode, click on Apply to save these settings first before you

go to Tone Selection.

ADSL Tone Settings

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 routers 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

directed by your ISP.

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D-link Wireless ADSL2/2+ 4-port Ethernet Router DSL-2640U Manuel d'utilisateur Page 31