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…
Where can I get this zip file ? I was trying to search on developer.sierrawireless.com, but unsuccessful.