Important Notice...............................................................................................................................3
Safety and Hazards............................................................................................................................3
Limitations of Liability .......................................................................................................................3
Copyright...........................................................................................................................................4
Trademarks........................................................................................................................................4
Contact Information..........................................................................................................................4
Contents ............................................................................................................................................5
1. Overview ...................................................................................................................................7
1.1. Document History .........................................................................................................7
1.2. References.....................................................................................................................7
1.3. Abbreviations ................................................................................................................7
1.4. Products List..................................................................................................................8
1.5. Presentation Rules ........................................................................................................8
1.6. AT Command Syntax......................................................................................................8
2. Introduction ..............................................................................................................................9
2.1. Features.........................................................................................................................9
2.2. Application ....................................................................................................................9
3. Device Connection ..................................................................................................................10
4. Commonest Command ...........................................................................................................13
5. SMS Function ..........................................................................................................................13
5.1. GSM/GPRS/LTE SMS Function .....................................................................................13
5.1.1. GSM/GPRS/LTE Query SMS Center..................................................................14
5.1.2. GSM/GPRS/LTE ASCII Message........................................................................14
5.1.3. GSM/GPRS/LTE PDU Message .........................................................................14
5.1.4. GSM/GPRS/LTE Send short letter ....................................................................14
5.1.5. GSM/GPRS/LTE Message Relate Command ....................................................16
5.1.6. GSM/GPRS/LTE Receive SMS...........................................................................16
5.2. SMS Process ................................................................................................................17
6. Dial Up.....................................................................................................................................17
6.1. Phone and Modem Options........................................................................................18
6.2. Setting the 19200 Modem ..........................................................................................21
6.3. Add Connection...........................................................................................................24
6.4. Dial Up.........................................................................................................................33
6.5. APN/VPDN Setting.......................................................................................................34
6.5.1. APN Setting......................................................................................................34
7. CSD ..........................................................................................................................................35
7.1. Relate Command.........................................................................................................35
7.1.1. Modem Initial Command ................................................................................35
7.1.2. Server Initial ....................................................................................................35
7.1.3. Client Dial A Data Call......................................................................................36
7.1.4. Server Manual Answer ....................................................................................36
