Chapter 4 – Call Control Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
22
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 21,
Unsolicited AT Result Codes,
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