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3.0 Command overview .................................................................................... 15
3.1 Introduction ....................................................................................... 15
3.2 Command syntax ................................................................................ 15
3.2.1 DTE Commands ....................................................................... 15
3.2.2 AT Command guidelines ........................................................... 15
3.2.3 Basic command syntax ............................................................... 15
3.3 AT Command ..................................................................................... 15
3.3.1 AT Command guidelines ........................................................... 15
3.3.2 AT Commands, DTE Adaptation .............................................. 15
3.3.3 AT Command Format ............................................................... 16
3.3.4 Escape Code Sequence ............................................................... 16
3.4 AT Commands ................................................................................... 17
3.4.1 AT& Commands ....................................................................... 26
3.4.2 AT% Commands ....................................................................... 30
3.4.3 AT\ Commands ......................................................................... 30
3.5 Error detection and data compression commands ............................... 31
3.5.1 AT% Commands ....................................................................... 31
3.6 Special commands ............................................................................... 31
3.7 AT Command Result Codes ............................................................... 32
3.8 S Registers ........................................................................................... 37
3.8.1 Factory defaults .......................................................................... 37
4.0 AT command set summary ......................................................................... 39
5.0 Service ......................................................................................................... 42
6.0 Trouble-Shooting ........................................................................................ 42