Table of Contents
1. Introduction ............................................................................................. 6
1.1 Command Syntax....................................................................................................6
1.2 Syntax of AT+ Commands ....................................................................................7
1.3 Help on AT Commands...........................................................................................7
1.4. Most common AT-commands.............................................................................7
AT? Command Help (Page 30) ....................................................................................7
ATA Answer Command (Page 7) ...............................................................................7
ATD Dial Command (Page 7)......................................................................................7
ATEn Command Echo (Page 20) .................................................................................8
ATHn Hang-Up (Page 9) ...............................................................................................8
ATO Go On-Line (Page 9) ............................................................................................8
ATS Select an S-Register (Page 11) .........................................................................8
ATV Define Response Format (Page 20)...................................................................8
AT&F Restore Factory Settings (Page 12)...............................................................8
AT&V View Active Configuration (Page 12)...........................................................8
A/ Re-execute Command Line (Page 30)................................................................9
+++ Escape Sequence (On-Line Command Mode)...............................................9
2. Descriptions of AT Commands.............................................................. 10
2.1. Call Control........................................................................................................... 10
ATA Answer Command ............................................................................................. 10
ATD Dial Command.................................................................................................... 10
Examples:.......................................................................................................................11
ATH Hang Up Call....................................................................................................... 12
ATL Monitor Speaker Volume ................................................................................. 12
ATM Monitor Speaker Mode................................................................................... 12
ATO Go On-Line......................................................................................................... 12
ATP Set Pulse Dial as Default.................................................................................. 13
ATT Set Tone Dial as Default................................................................................... 13
AT+CHUP Hang Up Call............................................................................................ 13
AT+CRC Cellular Result Codes................................................................................ 13
AT+CSTA Select Type of Address ........................................................................... 14
2.2. Data adapter Control Commands................................................................... 14
ATI Identification........................................................................................................ 14
ATS Select an S-Register.......................................................................................... 15
ATZ Recall Stored Profile.......................................................................................... 15
AT&F Restore Factory Settings............................................................................... 15
AT&V View Active Configuration........................................................................... 15
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