D-Link DSL-2790U - ADSL Configuration; ADSL Settings

77D-Link DSL-2790U Wireless N300 ADSL2+ Modem Router User Manual
Section 4 - Conguration
ADSL
ADSL SETTINGS
To congure the ADSL-VDSL modulation, click DSL Settings.
In most cases you can leave the settings at their default values.
Click Apply when you are done.