To request a new License, you first need to download the request file from the device. 
The request file contains basic information about the system like:
- Hardware information (MAC address of Master DECT manager)
- Software version
- Number of connected DECT managers / Base stations / handsets
- Enabled licenses
- Country selection
- Data and time
- Provider / profile name
The file content is encrypted.
In the Integrator web-interface go to SETTINGS - System - Licensing - Create Request File
The License request file is downloaded.
(Screenshot is from an N870 switched to Integrator only mode)