I’ve red very nice document PowerDownModeActivationUsingOpenAT__rev001-2005-07-04.pdf.
At bottom of this tutorial there is an information:
This application note is delivered as a single
compressed zip archive as follows: Power_Down_Mode_Using_Open-AT.zip Application Note + 2 sample applications…
For low power, please refer to AT cmd guide related to the FW you are using, Appendix 3.1. Working Modes (specify appendix 3.1.1.2.1).
For internet application, there are lots of sample projects comes with the application framework, just select “WIP Library Package” in “Libraries” tab and you will see.