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OnCell G2150I AT Command Set Call Control Commands
4-4
Command Possible responses
ATH
Note: Ask for disconnection
OK
Note: Every call, if any, are released
ATH1
Note: Ask for outgoing call disconnection
OK
Note: Outgoing call, if any, is released
Defined values: <n>
0: Ask for disconnection (default value)
1: Ask for outgoing call disconnection
Answer a Call: A
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 command.
Command syntax: ATA
Command Possible responses
RING
Note: Incoming call
ATA
Note: Answer to this incoming call
OK
Note: Call accepted
ATH
Note: Disconnect call
OK
Note: Call disconnected
Defined values: No parameter
Remote Disconnection
This message is used by the product to inform the application that an active call has been released
by the remote user. The product sends “NO CARRIER” to the application and sets the DCD signal.
In addition, for AOC, the product can release the call if credit has expired (release cause 68 with
+CEER command).
Extended Error Report: +CEER
Description: This command gives the cause of call release when the last call set up (originating or
answering) failed.
Command syntax: AT+CEER
Command Possible responses
ATD123456789;
Note: Outgoing voice call
NO CARRIER
Note: Call setup failure
AT+CEER
Note: Ask for reason of release
+CEER: Error <xxx>
OK
Note: <xxx>is the cause information element values
from GSM recommendation 04.08 or specific Call
accepted
“NO CARRIER” indicates that the AT+CEER information is available for failure diagnosis.
Defined values: No parameter