Draytek Vigor 2820 Series - Manual (Page 7)

3
Interface Description
Factory Reset Restore the default settings. Usage: Turn on the router (ACT LED is blinking). Press
the hole and keep for more than 5 seconds. When you see the ACT LED begins to
blink rapidly than usual, release the button. Then the router will restart with the
factory default configuration.
LAN (1-4) Connecters for local networked devices.
DSL Connecter for accessing the Internet through ADSL2/2+.
WAN 2 Connecter for remote networked devices.
USB Connecter for a USB device (for 3G USB Modem or printer).
PWR Connecter for a power adapter.
ON/OFF Power Switch.