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2.4.9 Voice call settings
Incoming calls are accepted only from the preconfigured (up to 4) phone numbers.
Calls initiated from other phone numbers are rejected automatically.
In case of an incoming call the module answers the call automatically in hands-free
mode after the configured number of rings. The call can be terminated by pressing the
Cancel
key, or by the caller. The call is also terminated if an emergency call is
initiated.
Due to the compact design of the device, its speaker and microphone are close to each
other. Therefore, due to the application of hands-free mode, it may happen that the
caller hears his own voice back through the phone during a conversation. This echo
phenomenon is normal while using the device, therefore it may not be the subject of a
quality complaint.
To reduce possible echo phenomenon, there is possibility to adjust the speaker volume
of the device during a conversation through DTMF commands using the keys of the
phone. By pressing intermittently key 3 on the phone the speaker volume can be
decreased, while pressing key 6 it can be increased.
2.4.10 SMS forwarding
The SMS messages received on the SIM card of the device are forwarded automatically
to the phone number set in memory section 1. (This can be used e.g. for forwarding
pre-pay card balance information messages received from the GSM service provider).
If no phone number is set in memory section 1, the device does not forward and deletes
incoming SMS messages.
2.4.11 SMS restriction
The device has built-in SMS restriction function, which allows sending of max. 50
messages per 12 hours (regarding to the sum of the forwarded and alarm messages).
