Chapter 2 Hardware
AX/DX/EX/PX Series User’s Guide
36
Figure 14   LED Indicators (EX5300-B3)
The following are the LED descriptions for your DX5301-B2/B3, EX5300-B3 and EX5301-B3.
Table 8   LED Descriptions (DX5301-B2/B3, EX5300-B3 and EX5301-B3)
LED COLOR STATUS DESCRIPTION
POWER  Green On The Zyxel Device is receiving power and ready for use.
Blinking The Zyxel Device is self-testing.
Red On The Zyxel Device detected an error while self-testing, or there is a 
device malfunction.
Blinking The Zyxel Device is upgrading firmware.
Off The Zyxel Device is not receiving power.
DX5301-B2 
WAN 
Green On The DSL or Ethernet WAN or SFP port is connected successfully.
Note: SFP connection has priority over DSL and Ethernet WAN 
connection. Ethernet WAN connection has priority over 
DSL connection. The Ethernet WAN and DSL ports will be 
disabled if SFP link is up. The DSL port will be disabled if 
the Ethernet WAN link is up.
Blinking (Slow) The DX5301-B2 is detecting the connection type (ADSL or VDSL) on its 
DSL port.
Blinking (Fast) The DX5301-B2 connection on its DSL port is in process.
Off The DSL or Ethernet WAN or SFP port is not connected successfully.