Multitech MultiModem Cell MTCBA-C1 User's Guide Page 33
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Chapter 9 – Call Control Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 33
Chapter 9 – Call Control
Commands
Dial Command D
Description: The ATD command is used to originate a voice or data call.
For a data call, the application sends the following ASCII string to the product:
ATD<nb> where <nb> is the destination phone number.
Note: ATD<nb> is followed by PPP session startup and negotiation. Standard PPP packets are
HDLC formatted. A packet data call is terminated by de-assertion of the DTR signal to the
modem. See the AT&D command.
For a voice call, the application sends the following ASCII string to the product:
ATD<nb>; where <nb> is the dialing string or destination phone number, followed by a
semicolon “;”. The dialing string may contain characters “0-9”,”#”,”*” only. Note that some
countries may have specific numbering rules for their CDMA handset numbering.
If a call, voice or data, is already in progress, initiating a dial will return an ERROR.
The dial sequence is responsible for handling emergency calls. It is the host application's
responsibility to tear down a data call if an outgoing emergency call has been initiated.
The response to the ATD command is one of the following:
Verbose
Result Code
Numeric Code
(with ATV0 set)
Description
OK 0 Command executed (voice)
ERROR Call already in progress
CONNECT
<speed>
10,11,12,13,14,1
5
If the call succeeds, for data calls only, <speed> takes
the value negotiated by the product
BUSY 7 If the called party is already in communication
NO ANSWER 8 If no hang up is detected after a fixed network time-out
NO CARRIER 3 Call setup failed or remote user release
NO DIALTONE 6 Voice call with missing “;”
Direct Dial Syntax: Command 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.
- CDMA-C1 AT Commands 1
- Contents 3
- Chapter 1 – Introduction 7
- Chapter 2 – AT Commands 8
- Overview 8
- Command Types 9
- Command Format and Syntax 9
- Input Command Syntax 10
- Other Syntax 10
- Output Response Syntax 10
- Parameter Defaults 10
- Unsolicited Message Syntax 11
- Attention AT 12
- Repeat Last Command A/ 12
- Echo E 12
- Bits +WUSLMSK 13
- Chapter 4 – Identification 15
- Commands 15
- Chapter 5 – Query Commands 17
- Chapter 6 – Global 18
- Configuration Commands 18
- Save Configuration &W 19
- Chapter 7 – Status Commands 20
- Chapter 8 – Communication 26
- Set Diagnostic Port +WDMX 27
- Set DCD Signal &C 27
- Set DTR Signal &D 28
- Set DSR Signal &S 28
- Automatic Answer S0 30
- Command Edit Character S5 31
- Chapter 9 – Call Control 33
- Hang-Up Command H 34
- Answer a Call A 34
- Incoming Call +RING 35
- Emergency Mode +WSOS 37
- Call Answered +WANS 38
- Call Connected +WCNT 38
- Call Ended +WEND 39
- Call Originated +WORG 40
- CPHS Command +CPHS 40
- Call Forwarding +CCFC 42
- Send DTMF Tones +VTS 44
- Chapter 10 – Network Service 45
- Signal Quality +CSQ 46
- Band Preference +WBND 49
- Service Indication +WSRV 50
- Roam Preference +WRMP 50
- Default Cell Band +WDCB 51
- Roaming Indication +WROM 51
- Chapter 11 – Provisioning 54
- Control Commands 54
- Excess SPC Failures +WLCK 55
- Download PRL +DPRL 56
- Commit Changes +WCMT 58
- Set IMSI +WIMI 58
- Slot Cycle Index +WSCI 60
- SID and NID +WSID 60
- Chapter 12 – OTASP / OTAPA 61
- Commit Successful +WOTC 62
- SPL Unlocked +WOTS 62
- NAM Download OK +WOTN 62
- MDM Download OK +WOTM 62
- IMSI Download OK +WOTI 63
- PRL Download OK +WOTP 63
- Chapter 14 – Short Message 70
- Service Control Commands 70
- Read Message +CMGR 71
- List Message +CMGL 72
- Delete Message +CMGD 73
- Chapter 15 – Audio Commands 79
- Microphone Gain +VGT 81
- Speaker Gain Control +VGR 82
- Digital Gain Receive +WDGR 84
- Echo Cancellation +ECHO 86
- Speaker Driver Gain +WSDG 87
- Audio Loopback &T 88
- Chapter 16 – Data Commands 89
- R-SCH Selection $QCMIP 90
- MIP Selection $QCMIPP 91
- Chapter 17 – TCP APP AT 98
- Chapter 18 – Sleep Commands 107
- Builds) 111
- Chapter 19 – Antenna 111
- Commands (Not for IP and GPS 111
- +WANTPOLL 113
- Auxiliary GPS Power +WANT 115
- Scenarios 118
- Call Processing 119
- Sending Binary Data 120
- TCP Socket Examples 121
- TCP Server Example 122
- ATZ, and AT&F 123
- Chapter 22 – CDMA 128
- Terminology and Acronyms 128
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