
Table of Contents
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
3
Contents
Chapter 1 – Introduction................................................................................................................................................9
Scope of This Document ............................................................................................................................................9
Related References....................................................................................................................................................9
Terminology and Acronyms......................................................................................................................................10
Chapter 2 – AT Command Features ...........................................................................................................................13
Serial Interface Settings ...........................................................................................................................................13
Command Line.........................................................................................................................................................13
Information Responses and Result Codes ...............................................................................................................13
Chapter 3 - General Commands .................................................................................................................................14
Attention AT ...........................................................................................................................................................14
Request Revision Identification +CGMR .................................................................................................................14
Electronic Serial Number +CGSN ...........................................................................................................................14
Select TE Character Set +CSCS.............................................................................................................................15
Request IMSI +CIMI................................................................................................................................................15
Capabilities List +GCAP..........................................................................................................................................15
Repeat Last Command A/ .......................................................................................................................................15
Phone Offline +CPOF .............................................................................................................................................16
Set Phone Functionality +CFUN .............................................................................................................................16
Phone Activity Status +CPAS..................................................................................................................................16
Report Mobile Equipment Errors +CMEE................................................................................................................16
Keypad Control +CKPD ..........................................................................................................................................17
Clock Management +CCLK.....................................................................................................................................17
Ring Melody Playback +CRMP ...............................................................................................................................17
Ringer Sound Level +CRSL ....................................................................................................................................18
Subscriber Number +CNUM....................................................................................................................................18
Select Type of Address +CSTA...............................................................................................................................18
View Modem Timers +WTMR .................................................................................................................................19
Chapter 4 – Call Control Commands..........................................................................................................................20
Dial Command D.....................................................................................................................................................20
Hang-Up Command H.............................................................................................................................................21
Answer a Call A.......................................................................................................................................................22
Remote Disconnection .............................................................................................................................................22
Extended Error Report +CEER ...............................................................................................................................22
DTMF Signals +VTD, +VTS ...................................................................................................................................23
DTMF Start and Stop Continuous +WSDT, +WSDS ..............................................................................................23
Redial Last Telephone Number DL .........................................................................................................................24
Automatic Dialing with DTR %Dn ............................................................................................................................24
Automatic Answer S0 ..............................................................................................................................................24
Incoming Call Bearer +CICB ...................................................................................................................................25
Single Numbering Scheme +CSNS.........................................................................................................................25
Microphone Gain +VGT...........................................................................................................................................26
Volume Gain Control +VGR ....................................................................................................................................26
Microphone Mute Control +CMUT...........................................................................................................................27
Speaker & Microphone Selection +SPEAKER ........................................................................................................27
Echo Cancellation +ECHO ......................................................................................................................................27
Side Tone Modification +SIDET ..............................................................................................................................28
Initialize Voice Parameters +VIP .............................................................................................................................28
TTY Mode +WTTY ..................................................................................................................................................28
Chapter 5 – Network Service Commands ..................................................................................................................29
Signal Quality +CSQ ...............................................................................................................................................29
Mode Preference +COPS........................................................................................................................................29
Band Preference +WBND .......................................................................................................................................30
Roam Preference +WRMP......................................................................................................................................31
Network Registration & Roaming +CREG ...............................................................................................................31
Change NAM Selection +WNAM.............................................................................................................................32
Read Current NAM +WCNM ...................................................................................................................................32
Emergency Mode +WSOS ......................................................................................................................................33
Extended Roam Indication +WRMW.......................................................................................................................34
Chapter 6 – SIM Card Operational Commands..........................................................................................................35
Enter PIN +CPIN .....................................................................................................................................................35
Enter PIN2 +CPIN2 .................................................................................................................................................36
PIN Remaining Attempt Number +CPINC...............................................................................................................36
Facility Lock +CLCK................................................................................................................................................37
Change Password +CPWD .....................................................................................................................................38