netsys NV-720R User Manual page 17

And the table shows the description.
Connectors
Reset Tact switch Button
Power DC Power Jack
Line RJ-11
USB USB2.0 Type A
Ethernet
RJ-45
(E1-E4)
NV-720R ADSL2+/ VDSL2 Modem Router USER'S MANUAL Ver. A.2
(Table 3-2)
Table 3-2 Description of the router rear connectors
Type
The reset buttons allows users to reboot the VDSL2 or load the default
settings.
Press and hold for 1-5 seconds: Reboot the VDSL2 Router
Press over 5 seconds: Load the default settings
External Power Adapter: Input: AC 85~240Volts/50~60Hz
For connecting to a VDSL2 device.
For connecting to the USB dongle.
For connecting to an Ethernet equipped device.
16
Description
Output: DC 12V/1A