Specifications

Chapter 9 – Call Control Commands
36 Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide
Direct Dial
Syntax: ATD<nb>[;]
Command
Possible Responses
ATD18005551212;
Note: Attempt a
voice call.
OK
Note: Command executed
+WORG:18005551212
Note: Voice call origination sent to Base Station with dial string
“18005551212”.
+WCNT: 9
Note: Call Connected, CDMA traffic channel established with service
option 9. You can now hear audio of the calling party’s phone ringing.
However, this event does not mean the other calling party has
answered.
ATD5551212;
Note: Example of
a failed voice call
attempt.
OK
Note: Command executed
+WORG:5551212
Note: Voice call origination sent to Base Station with dialing string
“5551212”.
+WEND: 3
Note: Call Attempt failed/ended. Reason 22, signal faded.
To receive +WCNT, +WORG, and +WEND unsolicited responses, set AT+WUSLMSK to enable
responses.
Hang-Up Command H
Description: The ATH (or ATH0) command is used by the application to disconnect the remote user. In the
case of multiple calls, all calls are released (active, on-hold and waiting calls).
Syntax: ATH
Command
Possible Responses
ATH
Note: Ask for disconnection
OK
+WEND: 29
Note: Every call, if any, is released
To receive +WEND unsolicited responses, use the AT+WUSLMSK command to enable them.
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.