ENUK - V1.4 - 25/01/17
50
4000 Series GSM Audio Intercom - Technical Manual
4000 Series GSM Audio Intercom with Proximity
SYSTEM CHECKS AND TESTING
The following table can be used to help diagnose any potential issues that may be occur during installation and the system checks
that can be carried out to help resolve them.
SYMPTOM
TEST
Interference on the speech.
Check the signal strength
1111SIG?
(if the signal strength is too low the GSM module increases
it’s power to compensate, causing interference with the speech circuits). Try relocating the
antenna or using a more powerful or directional antenna (e.g. high gain 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 repeatedly beeps
twice and the back lit name plate of
the module
(not additional button
modules)
does not illuminate.
Check the power supply has adequate voltage as described earlier in this manual (refer to
pages 10 and 26).
Try a full reset (refer to page 29), powering up with terminals g & 8 shorted.
Try a different SIM card.
The GSM PRO intercom module may have a fault.
A long beep is heard when the
button is pressed.
No telephone number setup for that button. Check the programming.
Check the SIM card is fitted correctly (refer to pages 27 and 28).
The intercom panel does not respond
to SMS messages.
Check the SIM card has an 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 GSM PRO intercom panel).
After sending an SMS message to the GSM PRO intercom listen for a single short beep from
the intercom panel. This will indicate that the message was received and understood. If a long
beep is heard it indicates the message was either not understood or the 4 digit master code
was incorrect.
Try resetting the 4 digit master code to 1111 (refer to page 29), powering up with terminals
g & 7 shorted.
The call keeps dropping out.
Increase the call time
(SPT)
in programming (refer to page 34).
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 on the back of the GSM PRO
intercom (refer to page 7).
Try adjusting the volume using the programmable settings during a call (refer to user
commands on page 46).
Check the microphone is fitted correctly in the intercom panel and that the mic hole is not
blocked in any way.
ERROR message returned in SMS
when programming or no SMS
returned at all even though a ? was
included at the end of the message
sent.
Check over the message sent again and compare it with the examples in this manual.
Common errors include:
1. Using two apostrophe marks side by side instead of
“
. Note that these look the
same in the message. An easy way to see if this is the problem is to move the cursor
along in the message and if the cursor can get between the two
“
then it is not the
correct character used.
2. Lower case letters instead of upper case. For example using
stn
when
STN
should be used.
Troubleshooting
