Call Waiting - Multitech MTCBA-C-IP-N12 Reference Manual

Incoming Voice Call
AT+CLIP=1
OK
AT+CNUM
+CNUM: "Phone","8585551212",129
OK
...Incoming call...
+RING
+CLIP: "8585552323",129
ATA
OK
+WANS
+WCNT:3
...Conversation...
+WEND:6 Call ended, end reason 6 (Normal Release), call released by the remote party

Call Waiting

ATD8585551212;
OK
+WORG:8585551212
+WCNT:3
...Conversation...
+CCWA:"8582701234",129
AT+WFSH
OK
+WFSH
...Conversation...
AT+WFSH
OK
+WFSH
...Conversation...
repeat as necessary
ATH
OK
+WEND:10
Originate Data Call
...Host configured...
ATD#777
CONNECT
...PPP negotiation...
...
...PPP layer shutdown...
NO CARRIER
AT
OK
Originate Data Call Failure
...Host configured...
ATD#777
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
AT
OK
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
Enable incoming caller id presentation
Display module phone number
Incoming call indication
Identification of the remote party
Answer the call
ATA command is being processed
Call has been answered
Call Connected with CDMA Service Option 3, Traffic channel established
Make a voice call (final semicolon character required for voice call)
ATD Command is being processed
Indication of call origination sent to the Base Station with dialing string 18001234567
Call Connected with CDMA Service Option 3, Traffic channel established.
Conversation with party
Indication of another incoming call, Audio beep sound in the earpiece
Send a flash to the Base Station (toggle to the second incoming call).
AT command is being executed.
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 with party
Send a flash to the Base Station (toggle back to the first call).
AT command is being executed.
Flash sent to the Base Station. Call switches to the first call; this is not 100%
because the there is no confirmation from the Base Station.
Conversation with party
Release all of the calls
ATH command is being executed
Calls End
Host application configured for PPP dial up access
Initiate data call (no final semicolon character), number string is carrier specific
Data call connected
PPP layer startup and data exchange
Host application terminates PPP session
Data call terminated
Module re-enters command mode
Host application configured for PPP dial up access
initiate data call (no final semicolon character), number string is carrier specific
Data call terminated
Module re-enters command mode
Chapter 22 – AT Command Examples
guaranteed
173