pwr
、
WAN Link
：
continuous green light
WAN Act
：
off at no traffic otherwise yellow light blink with certain time interval
Other LEDs are off in normal state.
Connect power cord and power on the Extension
Expansion Module
ES-0624/0030
When ES-0624 finish power on process, normal LED status as follows:
pwr
、
sync
：
continuous green light
sys1
、
sys2
：
green light blink with certain time interval
PHONE
：
continuous green light when off-hook, green light blink when ringing
the extension, and off otherwise.
LINE
：
off when Line is well-connected and available, continuous green light
when In a call, and blink green light when line is disconnected or ring the line.
Other LEDs are off in normal state.
