Contents
11 Functions ...............................................................................................35
11.1 Entering the PIN of the SIM Card ........................................................................35
11.2 Insert and Remove SIM Card...............................................................................36
11.3 Checking the Status of the GSM Login................................................................38
11.4 Checking the GSM Signal Quality........................................................................39
11.5 Automatic baud rate detection ............................................................................40
11.5.1 Serial Connection ................................................................................... 40
11.5.2 Phone connection .................................................................................. 41
11.6 Data Flow Control (Handshake) ...........................................................................42
11.6.1 Hardware Data Flow Control (RTS/CTS)................................................. 42
11.6.2 Software Data Flow Control (XON/XOFF) .............................................. 42
11.7 Establishing or Accepting a CSD Data Connection..............................................44
11.8 Establishing a PPP Data Connection....................................................................45
11.9 Automatic call acceptance...................................................................................46
11.10 Sending an SMS Manually ..................................................................................47
11.11 Automatic execution of AT commands................................................................48
11.11.1 Automated PIN entry and login after restart .......................................... 49
11.11.2 Automatic reset...................................................................................... 50
11.11.3 Alarm via DTR Control Line.................................................................... 51
11.12 Configuration of Energy Conservation Modes and Real-Time Clock....................54
11.12.1 Real time clock ....................................................................................... 54
11.12.2 Change Between the Energy Conservation Modes ............................... 56
11.12.3 Sleep Modes........................................................................................... 57
11.12.4 Power-Down Mode ................................................................................ 59
11.12.5 Shutdown mode..................................................................................... 61
11.13 Operation with a PLC...........................................................................................61
11.14 Using USSD Codes..............................................................................................62
11.15 Resetting the Device............................................................................................62
12 AT Command Reference........................................................................63
12.1 General Information to the Command Sets .........................................................63
12.2 Short Description AT Commands ........................................................................64
12.2.1 AT Commands According to V.250 ....................................................... 65
12.2.2 AT Commands for GSM Connections .................................................... 69
12.2.3 AT Commands for SMS ......................................................................... 71
12.2.4 AT Commands for GPRS Connections................................................... 72
12.2.5 AT Commands for Energy Conservation Functions ............................... 78
12.2.6 AT Commands for Time Functions ........................................................ 79
12.2.7 AT Commands for Automatic Functions................................................ 79
13 GSM Service Center Numbers ...............................................................80
14 APN Access Data...................................................................................81
15 Network Provider Codes ........................................................................82
Feb-12 5
