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A – Answer a call
Description:
When the product receives a call, it sets the RingInd signal and sends the ASCII “RING”
or “+CRING: <type>” string to the application (+CRING if the cellular result code
+CRC is enabled).Then it waits for the application to accept the call with the ATA com-
mand.
Syntax:
ATA
Command example
Possible responses
Note
RING
Incoming call
ATA
OK
Answer to this incoming
call, call accepted
ATH
OK
Disconnect call OK,
call disconnected
+CEER – Extended error report
Description:
This command gives the cause of call release when the last call set up
(originating or answering) failed.
Syntax:
AT+CEER
Command example
Possible responses
Note
ATD123456789
NO CARRIER
Outgoing voice call,
call setup failure
AT+CEER
+CEER: Error <xxx>
Ask for reason of release,
OK
<xxx> is the cause
information element
values from GSM recom-
mendation 04.08 or
specific, call accepted
For the cause information element from GSM 04.08 see further in this manual.
“NO CARRIER” indicates that the AT+CEER information is available for failure
diagnosis.
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