Multitech MultiModem Cell MTCBA-C1 User's Guide Page 119
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Chapter 20 – Host Application Scenarios
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 119
Call Processing
Call Origination
Calls are originated by using the ATD command.
Answer Incoming Call
Incoming calls are answered either by using the ATA command or setting the value of the Automatic Answer
S0 register to a non-zero value.
Hang Up Call
Calls can be terminated either by using the ATH command or by negating the modem signal DTR on UART1.
See the AT&D command for more information.
Subscriber Calling Features
Subscriber Calling Features provides voice call services beyond making a single call. The services are to a
large extent implemented on the network side and can, therefore, vary among different operators. The
examples below are for the service provider Verizon but should apply for most operators.
The services supported by the CDMA-C1 device are:
Calling Line ID
Call Forwarding
Call Waiting
Three-way calling
See Call Commands for more information about voice call services.
Calling Line ID
The caller‘s ID, if presented to the network during an incoming call, is reported as a +CLIP unsolicited
message if the AT+CLIP=1 command is issued. For example:
at+clip=1
OK
RING
+CLIP: "9195551212",129
Call Forwarding
Your application can unconditionally forward or cancel forwarding of all incoming calls by using the
AT+CCFC command.
Call Waiting
The device will report an incoming call while a call is active by using the +CCWA unsolicited response.
Three-Way Calling
The AT+WFSH command can be used to initiate and manage three-way calling.
- 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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