The Community version of NethVoice is mainly meant as a free entry point: for testing, small setups, labs, or getting familiar with the product.
It has limits so it’s designed only for very small environments.
The real target for full business use is the subscription version, which removes those limits and adds support, advanced features, and scalability.
So in short: Community = try & learn / small use cases. Subscription = actual business deployment.
At the moment, there are subs only for resellers.