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D-Link DSL-540B ADSL+ 4-Port Router User Manual
Section 7 - Advanced Setup
ADSL Tone Settings
The frequency band of ADSL is split into 56 separate tones, each spaced 4.315 kHz apart. Each tone carries separate
data, so the router operates as if 56 separate routers were running in parallel. The tone range is from 0 to 31 for
upstream and from 3 to 55 for downstream. Do not change these settings unless directed by your ISP.
Summary of Contents for DSL-2540B - ADSL2/2+ Modem With EN Router
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