Good news, Germany and Belgium PSTN Calling plans for user phone numbers are now out of preview and generally available from Microsoft for Skype for Business Online Phone System (previously called Cloud PBX) from today (1st November). According to the Microsoft Teams Roadmap, these should also be available by the end of the year for Microsoft Teams. That brings us up to 9 counties generally available. Currently, there are no new countries in public preview.
Calling Plans is the name of the service where Microsoft provide your user phone numbers directly from the cloud, acting as your “PSTN carrier”.
For both Germany and Belgium it’s not fully automated through the Office 365 Portal, you have to send an email to the service desk to request numbers. This is the same for France, Ireland and Netherlands, some of those have been generally available for some time.
It looks like the documentation still needs updating, but you can find the full details here:
Pricing for calling plans and per minutes rates are here: https://products.office.com/en-us/skype-for-business/calling-plans#requirements
This is nice that you made us understand the steps how to do this. But Being a user I wanted to know more about PSTN.