GL521MG User Manual
QSZTRACGL521MGUM0100
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2.3. LED Description
Figure 2. GL521MG LEDs
There are two LEDs on GL521MG. They can work separately and in combination to indicate the
status of the device. For the details when they work separately, please see the table below:
Table 5. GL521MG LED Description (work separately)
Fast flash: 100ms on/200ms off
Slow flash: 200ms on/1000ms off
Note:
The LEDs will be on about 5 minutes after power on. After that, they will always be off.
When they work in combination, the details are described as below:
Table 6. GL521MG LED Description (work in combination)
LED
Event
State
Status LED
(Green)
Searching network
Fast flash
The device has been registered on network
Slow flash
SIM is locked by PIN
Solid on
Network modem off
Solid off
GPS LED
(Blue)
GPS is in the process of fixing
Fast flash
GPS is on and GPS gets fix
Slow flash
GPS off
Solid off
During power on
Both the LEDs will be on to indicate the device is being
powered on.
When checking the device status
Both the LEDs will be on to indicate the device still
works.
During power off
Both the LEDs will flash simultaneously to indicate the
device is being powered off.
During charging
Both the LEDs will flash simultaneously to indicate the
device is being charged.
When fully-charged
Both the LEDs will be solid on to indicate the device is
fully charged.
LEDs
