GT-540P-3GWA-OEM1 user’s manual v1.0
2.5
LED indicators
There are four LED indicators to help users to know the various conditions of
GT-540P-3GWA-OEM1. The description is as follows
：
EXT(Red)：Power LED to indicate whether the power is input or not. The description is
as follows:
The power is active
The power is not active
on
off
3G (Green)：The modem LED can indicate the status of 3G module.
Modem normal
Modem fail
GPRS
Mode
Blanking per 3 sec
WCDMA
Mode
Twinkling twice per 3 sec
Off
or
Blanking (not 3 sec)
STA(Orange)：System LED is to indicate if the GT-540P-3GWA-OEM1 is normal or
fail.
Condition
External power
Normal
WCDMA/GPRS
Fail
PIN code is wrong
On
Blanking per 1
sec
Always on or off Blinking per 50 ms
GPS (Green)
：
GPS
can indicate the status of GPS module
GPS normal
GPS fail
Blinking per 1 sec
Always on or off
GT-540P-3GWA-OEM1 user’s manual, Version 1.0, 2013/03
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