
Chapter 1 Introducing the ZyXEL Device
P-663H-51 User’s Guide
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Figure 5 Front Panel
The following table describes the LEDs.
Table 1 Front Panel LEDs
LED COLOR STATUS DESCRIPTION
SYS Green On The ZyXEL Device is receiving power.
ALM Red On The ZyXEL Device has malfunctioned
LAN
1,2,3,4
Green On The ZyXEL Device has a successful Ethernet connection.
Blinking The ZyXEL Device is sending/receiving data.
Off The ZyXEL Device is not connected to the LAN.
DSL1, DSL2 Green On The respective DSL line is up.
Blinking Fast blinking means the ZyXEL Device is initializing the
respective DSL line. Slow blinking means the respective DSL
line is down.
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