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Chapter 9 – Call Control Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide 35
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.
Command is not valid for Multi-Tech UIP devices when in a AT+WOPEN=1 state.
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 “;”
- CDMA-C1 AT Commands 1
- Copyright 2
- Trademarks 2
- Revisions 2
- Contacting Multi-Tech 2
- Contents 3
- Contents 4
- Document Scope 9
- Related References 9
- Serial Interface Settings 10
- Overview 10
- Terminology 11
- Command Format and Syntax 11
- Command-Line Editing 12
- Input Command Syntax 12
- Other Syntax 12
- Output Response Syntax 12
- Parameter Defaults 13
- Unsolicited Message Syntax 13
- Attention AT 14
- Repeat Last Command A/ 14
- Echo E 14
- +WUSLMSK 15
- Syntax: AT+WPRI? 16
- Hardware Version +WHWV 17
- Capabilities List +GCAP 19
- Subscriber Number +CNUM 19
- Save Configuration &W 21
- General Indicator +WIND 22
- Result 23
- Examples: +WIND: 4 23
- Error Codes: 24
- Chapter 7 – Status Commands 25
- Fixed DTE Rate +IPR 28
- Set DCD Signal &C 29
- Set DTR Signal &D 29
- Set DSR Signal &S 30
- Syntax: AT+DR=<val> 31
- Syntax: AT+WCHD 31
- Automatic Answer S0 32
- Command Edit Character S5 33
- Dial Command D 35
- Hang-Up Command H 36
- Answer a Call A 36
- Syntax: ATA 37
- Incoming Call +RING 38
- Emergency Mode +WSOS 40
- Call Answered +WANS 41
- Call Connected +WCNT 41
- Call Ended +WEND 42
- Call Originated +WORG 43
- CPHS Command +CPHS 43
- Values: <LineId> 44
- Examples: 44
- Call Forwarding +CCFC 45
- Syntax: AT+WFSH 46
- Unsolicited 46
- Send DTMF Tones +VTS 47
- Serving System +CSS 49
- Signal Quality +CSQ 50
- Band Preference +WBND 53
- Service Indication +WSRV 53
- Roam Preference +WRMP 54
- Default Cell Band +WDCB 55
- Roaming Indication +WROM 55
- Values: <indicator> 56
- Values: <mode> 58
- Excess SPC Failures +WLCK 60
- Commit Changes +WCMT 61
- Set IMSI +WIMI 62
- SID and NID +WSID 63
- Commit Successful +WOTC 66
- SPL Unlocked +WOTS 66
- NAM Download OK +WOTN 66
- MDM Download OK +WOTM 67
- IMSI Download OK +WOTI 67
- PRL Download OK +WOTP 67
- Values: <Mode> 74
- Parameter 74
- Send Message +CMGS 75
- Read Message +CMGR 76
- List Message +CMGL 77
- Delete Message +CMGD 79
- Syntax: +WMGF 84
- Audio Subsystem Overview 85
- Chapter 15 – Audio Commands 86
- Microphone Gain +VGT 87
- Speaker Gain Control +VGR 88
- Values: <Gain> 89
- Digital Gain Receive +WDGR 90
- Values: <val1> 91
- Echo Cancellation +ECHO 92
- Audio Loopback &T 94
- Quick Net Connect $QCQNC 95
- R-SCH Selection $QCMIP 96
- MIP Selection $QCMIPP 96
- Chapter 16 – Data Commands 97
- Configure TCP/IP +WIPCFG 99
- Values: <cmdtype> 101
- Bearer Status +WIPBR 102
- Values: <protocol> 103
- Response 105
- Syntax: AT+WIPERR? 105
- Values: 107
- Options and 107
- 32kHz Sleep Mode +W32K 110
- Chapter 18 – Sleep Commands 111
- Syntax: +WNETTIMEGET? 112
- Response Field 112
- Description: 112
- Introduction 113
- Acquiring Cellular Service 113
- Call Processing 114
- Sending Binary Data 115
- TCP Socket Examples 116
- TCP Client Socket Connection 117
- TCP Server Example 117
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