Multitech MultiModem Cell MTCBA-C1 User's Guide Page 11
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Chapter 2 – AT Commands Overview
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 11
Unsolicited Message Syntax
The modem can notify the application of events as they occur. There are two types of unsolicited messages:
those that the modem will always report and those that are optional.
The format for unsolicited messages is:
<CR><LF>+WIND: 4<CR><LF>
As a general rule, unsolicited messages are not embedded in an AT command response. The unsolicited
message may be returned after an AT command is issued and before the AT command response, but not in the
middle.
Therefore, the following is NOT possible:
AT+CGMI<CR>
<CR><LF>WAVEC<CR><LF>RING<CR><LF>OM<CR><LF>
<CR><LF>OK<CR><LF>
However, the following example is possible:
AT+CGMI<CR>
<CR><LF>RING<CR><LF>
<CR><LF>WAVECOM<CR><LF>
<CR><LF>OK<CR><LF>
It is strongly recommended to design the host application parser to ignore unrecognized unsolicited messages.
Such a design allows for modifications to the returned unsolicited messages for testing purposes and possible
future enhancements to the modem. Unsolicited messages are discarded while the modem is in 32khz sleep.
Unsolicited messages can be buffered under certain conditions. The buffer is 15 entries deep and when full will
drop the oldest messages for a new message. To control the unsolicited message continue, use AT+WUSLMSK.
AT commands are buffered in PPP and TCP online data. It is recommended that during buffering that the level of
unsolicited messages be dropped back as far as possible; the Ring Indicator can be used as a replacement for
many unsolicited messages.
- 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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