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CHAPTER 5
TROUBLESHOOTING
NO.
GENERAL TROUBLE
POSSIBLE REASON
SOLUTION
Power indicator light turns off
1
2
3
4
5
6
7
8
9
No power input
Check the socket external AC
power is available
All functions disable but all
indicator lights is working
Caller ID presentation is not
active
Activate caller ID
The Master number already
exists
Other Master is already set
in the socket
Change Master number or
recover to factory default
setting
GSM indicator light turns off
Can't find or identify the SIM
card
SIM card not installed properly
The power switch is OFF
Set power to ON mode
Insufficient fee of the SIM card
Check your account
No power input
Check
GSM 158
external AC
power is available
The power switch is OFF
Set power to ON mode
Socket output cannot be
changed by “ “ button
SIM card PIN code is set to
ON mode
Set SIM card PIN code into
off mode
Socket didn't respond to any
operation
GSM 158
wok abnormally
Switch off the power, check
SIM card or reset factory
setting
Network signal weak or
network busy
If mobile phone's signal is
weak too, place the socket at
other place with strong
signal and try again
After power on the socket,
GSM indicator keeps flashing
SIM card PIN code is active
Deactive the SIM card PIN code
SIM card invalid
Contact your respoinsible
telecom company
SMS: “Invalid format. Please
check and try again.”
Invalid command
Refer to the user manual
SMS: "No authorization user"
Wrong user settings
Use the Master mobile phone
to try the command again
