User guide

Chapter 9 – Call Control Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 34
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: Command syntax: ATH
Command Possible Responses
ATH
Note: Ask for disconnection
OK
+WEND: 29
Note: Every call, if any, is released
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: 29
Note: Call disconnected
Calling Line Identification Presentation +CLIP
Description: This command allows control of the incoming Calling Line Identification Presentation (CLIP)
supplementary service. When CLIP is enabled, the +CLIP response is returned after the RING
unsolicited result code. By default, +CLIP is enabled.
CLIP = Calling Line Identification Presentation is a supplementary service that allows the called
party to receive the line identity of the calling party.
CNAP = Calling Name Presentation provides the name identification of the calling party to the
called party based on the calling party’s number. In this product, the CNAP will always be 129.
Syntax: Response syntax: AT+CLIP=<mode>
Command Possible Responses
AT+CLIP=1
Note: Enable CLIP
OK
Note: CLIP is enabled
AT+CLIP?
Note: Ask for current functionality
+CLIP:<mode>
OK
Note: <mode> defined as below
RING
+CLIP: “8585551212”,129
Note: Incoming call with CLIP and CNAP
AT+CLIP=0
Note: Disable CLIP presentation
OK
Note: Command valid
Values: <mode> This parameter enables or disables the caller +CLIP unsolicited response
0 Disable
1 Enable