You will receive the following information from Voys:
Login to the Axeos PBX, go to menu options 'Dial Settings' and choose 'Outbound'. Create a new outbound trunk.
Once the SIP trunk has been setup, go to menu option 'Dial Settings' and choose 'Inbound'.
Now you can add the phonenumbers using the following format: +31853456789 (including the plus sign)
Contact Details

e: info@voys.nl
w: http://www.voys.nl