AT COMMANDS
Contents
1 Introduction ...…………..... 1-1
1.1 Overview ............................………………………………………………………...........
1-1
1.1.1 Command Syntax ....………………………………………………………………..…..
1-1
1.1.2 Command Descriptions ..............................……………………………….................
1-1
1.2 Reference Documentation ...………………………….………………………………......
1-2
2 Syntax and Pr……………. 2-1
2.1 Alphabet...............................……………….…………………………………….……..... 2-1
2.2 DTE Commands Lines ..........……………….…………………………………….….......
2-1
2.2.1 Command Line General Format ...........…..........………………………………..........
2-1
2.2.2 Command Line Editing ………………………………………………………..…………
2-2
2.2.3 Command Line Echo ………………………………………………………..………...
2-2
2.2.4 Repeating a Command Line.….....................………………………………................ 2-2
2.2.5 Types of DTE Commands ........................………………………………....................
2-2
2.3 Basic Syntax Commands.…………………………………………………………............
2-3
2.3.1 Basic Syntax Command Format............................………………………………........ 2-3
2.3.2 S-Parameters .......………………………………………………………….………….....
2-3
2.4 Extended Syntax Commands..…………………………………………….……………....
2-4
2.4.1 Command Naming Rule………………………………………………….……………...
2-4
2.4.2 Values .....................……………………………………………………..…………..….. 2-4
Numeric Constants ...................................................……………………….……............. 2-4
String Constants……………………………………………………………………….……...
2-5
Compound Values………………………………………………………………….………… 2-5
2.4.3 Action Commands ..……………………………………………………………….……...
2-5
Action Execution Command Syntax ..............................………………………………...... 2-5
Action Test Command Syntax ........................................………………………………..... 2-6
2.4.4 Parameter Commands……………………………………………………………….…...
2-6
Parameter Types………………………………………………………………………..……..
2-6
Parameter Set Command Syntax ...................................………………………………..... 2-6
Parameter Read Command Syntax.................................…………………………………. 2-7
Parameter Test Command Syntax....................................……………………………….... 2-7
2.4.5 Additional Syntax Rule…………………………………………………………………..…
2-7
Concatenating Commands after Extended Syntax Commands……………………………
2-7
Concatenating Commands after Basic Format Commands..…………………………….....
2-7
2.5 Issuing Commands .............………………………………..………………………………...
2-8
2.6 Executing Commands..........………………………………………………………………..... 2-8
2.6.1 Aborting Commands………………………………………………………….……………...
2-8
2.6.2 Handling of Invalid Numbers and S-Parameter Values………………………………….
2-9
2.7 Modem Responses.......……………………………….....………………………………........
2-9
2.7.1 Responses...........…………………………………………………………………………..... 2-9
2.7.2 Extended Syntax Result Codes ..............…………………………………....................... 2-10
2.7.3 +<name>: <compound_value>Information Text Formats for Test Commands ....….....
2-11
Range of Values…………………………………………………………………………………..
2-11
Compound Range of Values................................................................................................ 2-11
3 Data Command S …3-1
3.1 Command Guidelines ..........………………………………………………………………......
3-1
3.1.1 Escape Code Sequence…………………………………………………………………….. 3-1
3.2 Data Commands...............…………………………………………………………………...... 3-1
3.2.1 Generic Modem Control………………………………………………………………………
3-2
Z - Reset to Default Configuration.......................................................................................
3-2
+FCLASS - Select Active Service Class..............................................................................
3-2
+VCID - Caller ID (CID) ....................................................................................................... 3-3
+VRID - Report Retrieved Caller ID (CID)..............….......................................................... 3-4
