P a g e
|
23
Q. There is no audio from the gate, but the person at the gate can hear ok.
A. This can be due to low reception or excessively long power cables.
-Check reception level on site.
-Change SIM card if necessary to another network which may have better coverage.
-Purchase a high gain antenna.
This may also be caused by a defective microphone, water on a microphone from a sprinkler for
example, or dirt/insects blocking the microphone hole. If reception is optimum and the problem
persists, contact your supplier or installer.
Q. The audio quality that can be heard on the remote telephone is poor or humming
(buzzing).
A. A small amount of GSM buzz can be considered normal on GSM intercoms, but not so much
that causes inability to hear the person speaking. This can be caused by the GSM antenna being
mounted too close to the speech panel or not mounted high enough, or poor power cables being
too long or thin.
-Try earthling the speech panel chassis to 0V of the power supply.
-This is also a symptom of poor reception. Try above steps on checking and improving reception.
Q. The keys do not work when the intercom calls a phone.
A. Check if you can hear the relay clicking at the gate when the keys are pressed during a call. If it
can be heard, then the system is working, check wiring between the relay and the lock or gate
panel. If the relays do not make a clicking sound, then check this feature on a different mobile cell
phone or landline. If it works on a different phone, check the settings on the phone in question
under DTMF tones.
Failure of DTMF tones to operate correctly is also a symptom of low reception or insufficient
power cabling. Check steps above on improving reception or addressing the power problem.
Also check that the relays are not already latched by SMS. Try sending unlatch command by SMS
and then try again.
Q. The system was operating the gates fine, but now it will not trigger the gates.
99% of the time, this is cause by the user accidentally latching the relay. This latches the output
relay permanently on. Send the unlatch SMS command and try again.
Q. The unit no longer calls out to phones but I can make a call to it from my phone.
A
– Check there is balance on the SIM card.
A
– Switch off the power, remove the SIM, put it into a phone, and check that a call can be made
from a phone. This will verify if the SIM is still working and in service.