Led Indicators - ICP DAS USA GTM-204M Series User Manual

3.3 LED Indicators

There are two LED indicators to help users to judge the various conditions of
GTM-204M-4G. The description is as follows：
A. PWR(Red)：The PWR LED can indicate the status of Power module.
Power normal
Always ON
B. 4G (Green)：The modem LED can indicate the status of GSM module.
4G module normal
ON 2 sec and OFF 1 sec
ON
OFF
1 2
4G module normal
ON
OFF
2
1
4G module fail
3
4 5 6
3
4 5 6
GTM-204M-4G Series User's Manual v1.3
4G module fail
OFF
or
ON 1 sec and OFF 2
sec
Time(sec)
7
Time(sec)
7
- 5/35 -
Power fail
Always OFF
Data transmission
Blinking per 0.2 sec