User's Manual

GL501MG GL501MG_T GL501MG_S User Manual
6
4. Troubleshooting and Safety Info
4.1. Troubleshooting
Table 2. GL501MG GL501MG_T GL501MG_S Troubleshooting List
Trouble Possible Reason Solution
After the device is turned
on, the Status LED always
flashes quickly.
The signal is too weak. The
device isn’t registered to the
network.
Please move the device to a
place with good network
coverage.
Messages can’t be
reported to the backend
server by GPRS.
APN is not right.
Ask the network operator for
the right APN.
The IP address or port of the
backend server is wrong.
Make sure the IP address for
the backend server is an
identified address in the
internet.
There is no response from
UART when the device is
configured by using UART.
The port is not ready or the
device is not powered on.
Please check the port and the
device to ensure they are
working properly.
The device can’t get GPS
fix.
The GPS signal is weak.
Move the device to a place
under open sky.
It is better to make the side
with antenna face the sky.
FCC Regulations:
This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
This device has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiated radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures: