Zhone Technologies 6238-I2 - Manual (Page 51)

6238-A2-ZB20-10 6238 Wi-Fi Router with VOIP User’s Guide 51
DSL Advanced Settings
The test mode can be selected from the DSL Advanced Settings screen.
Test modes include normal, reverb, medley, no retrain, and L3.
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 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.