User Manual
GPRS Solutions for Serial Connections
Copyright
©
2013 SHENZHEN ATC TECHNOLOGY CO., LTD.
3
2.1.2
STATE LED
Message
Description
Off
Not working
Blinking
Searching GSM network
On
GSM Connected
Table 2. STATE LED Message
2.1.3
ACT LED
Message
Description
Off
No data is transmitting between GSM and
serial port
On
Data is transmitting between GSM and
serial port
Table 3. ACT LED Message
2.1.4
PWR LED
Message
Description
On
Power on
Off
Power off
Table4. PWR LED Message
2.2
Installation Procedures
Installation of SIM card:
The SIM card should be install well before power on the DTU. Use a needle object to press the out bottom
