For this tutorial we will need to define a new button layout:
Choose "Button Layouts" from your left hand side menu, and then click on the "New button layout" button on the right hand side.
You need to keep the "Code" value as "linekey".
Once that's done, edit the autoprovision values. Here are some samples:
Note that type is "fnc=sd+blf+cp" which would take care of "speed dial" and "busy lamp field"
Next, make sure that your phone uses the proper template. On the left hand side menu, choose Phones:
Add or edit your phone, select the correct template, and then populate the first several lines with the right extensions:
Once that's done, scroll to the bottom of the page and choose the newly created button layout:
Set up the proper provisioning server on the phone, as outlined in our other help documents, and then reboot.