PAGE 29 of 32 DIGITAL GSM INTERCOM TECHNICAL MANUAL VER2.1.1
TROUBLE SHOOTING
SYMPTOM TEST
Interference on the speech
Check the signal strength ‘1111SIG?’. If the signal strength
is to low the GSM module will increase it’s power to
compensate causing interference with the speech circuits.
Try relocating the antenna or using a more powerful or
directional antenna.
Ensure the antenna cables are not running close to the
power supply cables or the microphone wires inside the
intercom panel
Try a different SIM card from a different service provider as
they may have better coverage in that area.
The intercom panel shows SIGNAL
ERROR’
Check the power supply is of adequate voltage. 13.8Vdc
Try a full reset as shown earlier in the manual.
Try a different SIM card and or antenna
Check the antenna is tight and in a good location.
Intercom module may have a fault.
SIM card has PIN setup. This must be disabled.
Error is displayed when I try to call an
apartment
No telephone number setup for that number. Check the
programming.
Check the SIM card is fitted correctly.
The intercom panel does not respond to
SMS messages
Check the SIM card has a SMS service centre number
stored. This will require putting the SIM card into a mobile
phone to check. Contact the SIM card provider if you are
not sure.
Check the number you are sending the message to is
correct (The number of the SIM card in the intercom panel
Try resetting the 4 digit code to 1111 as shown earlier in
this manual.
The call keeps dropping out
Increase the call time in programming.
Check the signal strength and if necessary, move or
change the antenna or try a different SIM card provider.
Speech echoes and feeds back
Try lowering the speaker volume using the dip-switches
Try adjusting the volume using the programmable settings
Check the microphone is fitted correctly in the intercom
panel and that the mic hole is not blocked in any way.
Display is blank Ensure the contrast adjustment is set
correctly
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