Chapter 22 – AT Command Examples
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
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Incoming Voice Call
AT+CLIP=1
Enable incoming caller id presentation
OK
AT+CNUM
Display module phone number
+CNUM: “Phone”,”8585551212”,129
OK
…Incoming call…
+RING
Incoming call indication
+CLIP: "8585552323",129
Identification of the remote party
ATA
Answer the call
OK
ATA command is being processed
+WANS
Call has been answered
+WCNT:3
Call Connected with CDMA Service Option 3, Traffic channel established
…Conversation…
+WEND:6 Call ended, end reason 6 (Normal Release), call released by the remote party
Call Waiting
ATD8585551212;
Make a voice call (final semicolon character required for voice call)
OK
ATD Command is being processed
+WORG:8585551212
Indication of call origination sent to the Base Station with dialing string 18001234567
+WCNT:3
Call Connected with CDMA Service Option 3, Traffic channel established.
…Conversation…
Conversation with party
+CCWA:”8582701234”,129
Indication of another incoming call, Audio beep sound in the earpiece
AT+WFSH
Send a flash to the Base Station (toggle to the second incoming call).
OK
AT command is being executed.
+WFSH
Flash sent to the Base Station. Call switches to the second call; this is not 100% guaranteed
because the there is no confirmation from the Base Station.
…Conversation…
Conversation with party
AT+WFSH
Send a flash to the Base Station (toggle back to the first call).
OK
AT command is being executed.
+WFSH
Flash sent to the Base Station. Call switches to the first call; this is not 100% guaranteed
because the there is no confirmation from the Base Station.
…Conversation…
Conversation with party
repeat as necessary
ATH
Release all of the calls
OK
ATH command is being executed
+WEND:10
Calls End
Originate Data Call
…Host configured…
Host application configured for PPP dial up access
ATD#777
Initiate data call (no final semicolon character), number string is carrier specific
CONNECT
Data call connected
…PPP negotiation…
PPP layer startup and data exchange
…
…PPP layer shutdown…
Host application terminates PPP session
NO CARRIER
Data call terminated
AT
Module re-enters command mode
OK
Originate Data Call Failure
…Host configured…
Host application configured for PPP dial up access
ATD#777
initiate data call (no final semicolon character), number string is carrier specific
Depending on the PPP session failure point, the module may not enter back into command mode until a network server timeout forces
PPP session shutdown. For a broken data pipe situation, the “+++” command can be used to force the module back into command mode.
NO CARRIER
Data call terminated
AT
Module re-enters command mode
OK