Westermo GDW-11 - Manual (Page 28)

28 Call Control commands 6615-2220
A – Answer a call
Description:
When the product receives a call, it sets the RingInd signal and sends the ASCII “RING”
or “+CRING: ” 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
Parameters:
No parameters
Command example Possible responses Note
RING Incoming call
ATA CONNECT 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
Parameters:
No parameters
Command example Possible responses Note
ATD123456789 NO CARRIER Outgoing call, Call setup
failure
AT+CEER +CEER : Error Ask for reason of release,
OK is the cause infor-
mation element values
from GSM recommenda-
tion 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.