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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
3G (Green)：The modem LED can indicate the status of 3G module.
GPRS
Mode
WCDMA
Mode
STA(Orange)：System LED is to indicate if the GT-540P-3GWA-OEM1 is normal or
fail.
External power
GPS (Green)：GPS can indicate the status of GPS module
GPS normal
Blinking per 1 sec
GT-540P-3GWA-OEM1 user's manual, Version 1.0, 2013/03
on
Modem normal
Blanking per 3 sec
Twinkling twice per 3 sec
Condition
Normal
Blanking per 1
On
GT-540P-3GWA-OEM1 user's manual v1.0
The power is not active
off
Modem fail
Blanking (not 3 sec)
WCDMA/GPRS
Fail
Always on or off Blinking per 50 ms
sec
GPS fail
Always on or off
Off
or
PIN code is wrong
15/52
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