D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual 
Section 2- Product Overview 
 
Hardware Overview 
Front Panel 
A steady green light indicates the unit is powered on. When the device is powered 
off this remains dark. During the Power-On Self-Test this light will be red. If this 
light remains red after the POST, a malfunction has occurred. 
A blinking green light indicates a valid DSL connection. This will be steady light 
after the DSL negotiation process has been settled. 
Steady green light indicates a successful Internet connection. Steady red light 
indicates failed Internet connection. Dark if no WAN protocol is configured. 
Steady green light indicates a successful WAN connection. Dark if no WAN 
device is connected. 
A solid light indicates a valid link on startup. This light will blink when there is 
activity currently passing through the Ethernet port. A green light will be 
illuminated for a 10/100Mbps connection. 
Steady green light indicates the 2.4GHz WLAN is available. 
Steady green light indicates the 5GHz WLAN is available. 
The light will flash while a WPS connection is being established. The light will light 
solid for 5 seconds if a successful WPS connection has been made. This is also 
the WPS button used to initiate the push-button WPS connection. 
Steady green light indicates a successful USB connection. Dark if no USB device 
is connected.