Nokia 12 GSM MODULE REMOTE I/O - Manual (Page 17)

5. OPTIONAL CONFIGURATIONS
5.1 DISABLING ACKNOWLEDGEMENTS
The Nokia 12 GSM Module acknowledges whether or not a text message has
successfully commanded a device. The Nokia 12 GSM Module sends a
response as a text message back to the phone number that sent the control
message. It is also possible to disable this feature to decrease the amount of
communication with the device, for example.
Figure 4 displays a dialog (User Control Mode -> Settings -> General) for
configuring acknowledgement messages.
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