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HUAWEI ME909u-521 LTE LGA Module
Application Guide
Contents
Issue 01 (2013-07-05)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4
Contents
1 Overview ......................................................................................................................................... 7
1.1 Conventions and Definitions ............................................................................................................ 7
1.1.1 Conventions ............................................................................................................................. 7
1.1.2 Definitions ................................................................................................................................ 7
1.2 Organization of This Document ........................................................................................................ 8
1.3 Basic AT Command Processing Principles ...................................................................................... 9
1.3.1 Ports ........................................................................................................................................ 9
1.3.2 AT Command Processing Mechanism..................................................................................... 9
1.3.3 Recommended Timeout Mechanism for AT Commands Processed by a Host..................... 12
2 Initialization Application Scenarios ....................................................................................... 14
2.1 Startup Indication ^SYSSTART ...................................................................................................... 14
2.1.1 Reference Process ................................................................................................................ 14
2.1.2 Troubleshooting ..................................................................................................................... 14
2.2 Querying Basic Information ............................................................................................................ 15
2.2.1 Reference Process ................................................................................................................ 15
2.2.2 Troubleshooting ..................................................................................................................... 15
2.3 Network Service Operations .......................................................................................................... 16
2.3.1 Reference Process ................................................................................................................ 16
2.3.2 Troubleshooting ..................................................................................................................... 17
3 Network Searching and Registration Application Scenarios............................................. 18
3.1 Searching and Registering Network............................................................................................... 18
3.1.1 Reference Process ................................................................................................................ 18
3.1.2 Troubleshooting ..................................................................................................................... 20
4 ECM Application Scenarios ...................................................................................................... 21
4.1 ECM Dialing ................................................................................................................................... 21
4.1.1 Reference Process ................................................................................................................ 21
4.1.2 Troubleshooting ..................................................................................................................... 22
4.2 Querying the Dial-up Connection State .......................................................................................... 22
4.2.1 Reference Process ................................................................................................................ 22
4.2.2 Troubleshooting ..................................................................................................................... 23
4.3 Disconnecting the Dial-up Connection ........................................................................................... 23
4.3.1 Reference Process ................................................................................................................ 23