Extended AT Commands Manual Page 17 of 70 2009-06-25
4. SIGNAL INFORMATION

4.1. MT SMS

Table 4-10
Status Signal Action
AT SMS Notification to Serial and USB ports
Idle,
Data Buzzer
$$SMSNOTIF value “0”: No alert
$$SMSNOTIF value “1”: Buzzer alerts 4 times initially only
$$SMSNOTIF value “2”: Buzzer alerts 4 times initially followed by
once every two sec.
$$SMSNOTIF value “3”: Buzzer alerts 4 times initially only

4.2. MT DATA

Table 4-11
Signal Action
AT ‘RING’ notification
Ring Buzzer Audible Ring (excepting where $$RCV_MODE is 1)