GL100M User manual
TRACGL100MUM001 - 9 -
4. Troubleshooting and Safety info
4.1. Troubleshooting
Trouble Possible Reason Solution
The SIM card is not inserted. Please insert the SIM card into
GL100M.
The signal is too weak;
GL100M can’t register to the
network.
Please move GL100M into
place with good GSM
coverage.
System do not support hot plug. Before power on the terminal,
insert the SIM card first.
After GL100M is turned on,
the Green LED 1 flashes
quickly always.
PIN locked Using SIM card without
SIM-PIN, or unlock SIM-PIN.
The SIM card in GL100M
doesn’t support GPRS.
Try a GPRS supported SIM
card.
APN is wrong. Some APN can
not visit the internet directly.
Ask the network operator for
the right APN.
Messages can’t be reported
to the backend server by
GPRS.
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.
The function of power key was
disabled by AT+GTFKS.
Enable the function of power
key by AT+GTFKS.
Unable to power off
GL100M.
Unable to power off GL100M if
charger connected.
Disconnect charger, and try
again.
GL100M is turned on after
insert a charging cable.
The function of full power up
was enabled by AT+GTFKS.
Disable the function of full
power up by AT+GTFKS.
No response from UART
when configure GL100M
through UART
GL100M is in power saving
mode.
Remove the Data_Cable_M,
and plug it in again. After this
operation, GL100M will exit
from power saving mode for 10
seconds.
Please move GL100M to a
place with open sky.
It is better to let the top surface
face to sky. (The same surface
with indication LED)
GL100M can’t get
successful GPS fixing.
The GPS signal is weak.
GL100M will stop GPS if it
can’t get GPS fixing in 3
minutes (except in emergency