NU_MTB200_001_05112013_EN
Date: 05.11.2013 Page 14 / 14
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Trouble
Possible Reason
Solution
The SIM card is not insered
Please insert the SIM card into
MTB200
The signal is too weak; MTB200 can’t
register to the network
Please move MTB200 into place
with good GSM coverage
After MTB200 is
turned on, the GSM
LED flashes quickly
always
PIN locked
Using SIM card without SIM-
PIN, or unlock SIM-PIN
The SIM card in MTB200 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+GTSFR
Enable the function of power
key by AT+GTFKS
Unable to power off
MTB200
Unable to power off MTB200 if
charger connected or using external
battery
Disconnect charger or external
battery, and try again
Remove the data cable
CA80189, and plug it in again.
After this operation, MTB200
will exit from power saving
mode for 10 seconds
No response from
UART when configure
MTB200 through
UART
MTB200 is in power saving mode
Re-try MTB200 manager tool
again, it will try to wake up
device
Please move MTB200 to a place
with open sky
MTB200 can’t get
successful GPS fixing
The GPS signal is week
It is better to let the top
surface face to sky. (The same
surface with indication LED)
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Please do not disassemble the device by yourself
Please do not put the device on the overheating or too humid place, avoid
exposure to direct sunlight. Too high temperature will damage the device
or even cause the battery explosion.
Please do not use MTB200 on the airplane or near medical
equipment
