Call Control
4-14 AT Commands Reference Manual December 31, 2007
Call Control
The following figure is a detailed view of the states the G24 goes through for Voice and CSD
Data, as shown in Figure 4-2. Note that between the time the OK is received and the actual
connection occurs, call state alerts are received.
Figure 4-10: Call States
Dialing Using ATD
atd+44 34 56 78; // VOICE call; number includes international access code
OK
OK
atd17085763400; //Second VOICE call
OK
OK //Call to 44345678 is being put on hold
ath //Hang up active call
NO CARRIER
OK
AT+CHLD=0 //Hang up held call
NO CARRIER
OK
atd+44 34 56 78 //DATA call
...
OK //Move to online Data state
//ESC sequence back to the Command state. +++ is sent from the
terminal (+++ is not displayed)
ath //Hang up data call
NO CARRIER
OK //Data call terminated
AT+FCLASS=1
OK
atd+44 34 56 78 //FAX call
...
NO CARRIER //Fax call was terminated by remote side
Idle
Dial
Connected
Alert
Released
Hold
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