This solution will take you through step by step on how to integrate your mobile account with 4HA.

Step 1: Select the mobile account and right click to ‘Add IP PBX integration’.
Step 2: Select '4HA' from the drop down menu and press 'next'.
Step 3: Enter your 4HA account credentials which will then create a device in the 4HA account for the client account in question (if a 4HA account exists) which you can then associate with a call flow or user if required.  Integration allows the mobile account user to make extension calls to/from their mobile, as well as being able to view the number associated with any inbound calls.
Step 4: Log into 4HA, select the device and allocate it to the desired user.