Sony Ericsson GM28, Integrator'S Manual

Page: 4 / 268

GM28 INTEGRATOR’S MANUAL
4
LZT 123 7468 R1A
3.2 Switching Off the Modem ............................................................................ 36
3.3 Resetting the Modem.................................................................................... 36
3.4 Operating States/LED................................................................................... 37
4. Safety and Product Care........................................................................................38
4.1 Safety Instructions ........................................................................................ 38
4.2 General Precautions...................................................................................... 38
4.3 SIM Card Precautions................................................................................... 39
4.4 Antenna Precautions ..................................................................................... 39
5. Installation of the Modem......................................................................................41
5.1 Where to Install the Modem ......................................................................... 41
5.1.1 Environmental Conditions...............................................................41
5.1.2 Signal Strength ................................................................................41
5.1.3 Connection of Components to GM28 ..............................................42
5.1.4 Network and Subscription ...............................................................42
5.2 How to Install the Modem ............................................................................ 42
5.2.1 Power Supply...................................................................................42
5.2.2 Securing the modem ........................................................................42
5.3 OEM Labeling .......................................................................................... 43
5.4 Antenna .......................................................................................... 43
5.4.1 General ............................................................................................43
5.4.2 Antenna Type...................................................................................44
5.4.3 Antenna Placement..........................................................................44
5.4.4 The Antenna Cable ..........................................................................44
5.4.5 Possible Communication Disturbances...........................................44
5.5 Attachments .......................................................................................... 45
6. Technical Data ........................................................................................................46
7. FCC Certificate.......................................................................................................51
Part 3: Using AT Commands.............................................................................. 53
1. Introduction to AT Commands.............................................................................55
1.1 Overview .......................................................................................... 55
1.2 Syntax Description ....................................................................................... 55
1.2.1 Conventions .....................................................................................55
1.2.2 AT Command Syntax .......................................................................56
1.2.3 AT Response Syntax.........................................................................57
1.3 Error Codes .......................................................................................... 59
1.3.1 +CME ERROR (Mobile Equipment Error Code) ...........................59
1.3.2 +CMS ERROR (Message Service Failure Result Code).................60
1.4 Examples on How to Use the AT Commands............................................. 61
2. Call Control.............................................................................................................63
2.1 AT+CPIN PIN Control ...................................................................... 63
2.2 ATA Answer Incoming Call ..................................................... 63