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Chapter 5 – Call Control Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 36
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.
Syntax: Command syntax: ATA
Command Possible Responses
RING
Note: Incoming call
ATA
Note: Answer to this incoming call
+WANS:0
+WCNT: 10
Note: Call accepted
ATH
Note: Disconnect call
OK
+WEND: 10
Note: Call disconnected
Remote Disconnection
Description: A message is used by the product to inform the application that the remote user has
released an active call. The product sends +WEND: <result code> to the application. The
DCD signal may be set based upon the AT&C2 setting for packet calls. See chapter
3,Unsolicited Results for more information on the +WEND command.
Extended Error Report +CEER
Description: This command gives the cause of any general call processing error or malfunction. See
Chapter 20, Extended Error Report.
Syntax: Command syntax: AT+CEER
Command Possible Responses
ATD18005551212;
ATD1234567;
Note: Outgoing voice call while already in a call
AT+CEER
OK
+WORG:18005551212
+WCNT:3
ERROR
Note: Call setup failure
+CEER: Error 2
OK
Note: Operation not allowed when call in progress
AT+CEER
Note: Ask for reason of release
+CEER : Error <x>
OK
Note: <x>is the cause information element values