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Also keep the GSM antenna away from the 12V PSU being used
to power the system.
2.
Lower the audio gain settings of the microphone and speaker. In
areas of poor signal coverage high gain settings will increase the
feedback gain and increase the levels of any audio noise present
on the network.
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Question:
What are the most common issues or questions for your
technical support department?
Answer:
The most common questions we get relating to our GSM devices,
in technical support, are:
a)
Questions arising because a Pay As You Go SIM is used
and has no credit and is unable to send text responses to
text commands. This GSM device is also unable to send
itself a text to ensure correct Time of day is available for
system operation.
b)
Questions arising because a Pay As You Go SIM is used
and may have credit but has not been topped up within the
required top up period of the network operator. This leads
to the SIM being de registered from the network with a
gradual removal of its capabilities.