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4.3.3.5
A, Answer Incoming Call
This command answers an incoming VOICE/DATA/FAX call after a RING/+CRING indication is sent to the terminal.
If the incoming call is answered (connected), the g20 sends a CONNECT notification to the terminal.
If the MT call fails, the possible notifications are:
• NO CARRIER - Connection Failure
• ERROR - General Failure
A waiting call (an incoming call during another call) is announced by +CCWA rather than RING. A waiting call can
be answered only if it is a voice call. The waiting voice call should be answered using the AT+CHLD command,
even though ATA will put the active call on hold and connect the waiting call, making it the active call. This ATA
Note
action is the same action as AT+CHLD=2
Exception: In the case of an intruder call (Call Waiting), the ATA command is issued and accepts this call. By all
standards, ATA in this case (one active call and one CW call) should be rejected.
Example
Example - Answering a voice call:
+CRING: VOICE
+CRING: VOICE
ata
CONNECT
ath
NO CARRIER
OK
Example - Answering a data call:
+CRING: REL ASYNC
+CRING: REL ASYNC
ata
CONNECT
4.3.3.6
+CRC, Cellular Result Codes and RING, +CRING - Incoming Call Indication
This command controls whether or not to present the extended format of an incoming call indication. The RING/+CRING
indication is sent from the g20 to the terminal when the g20 is alerted by an incoming call from the network. Once this indication
is sent, information is available on the calling line via +CLIP. When +CRC is disabled, the indication is RING, and when +CRC
is enabled, the indication is +CRING.
98-08901C68-O
//VOICE call connected - g20 is in Command mode
//DATA call connected - g20 is in Online Data mode
AT Commands Reference
59
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