Block incoming spam

Hello,
How can I block incoming spam calls in the free version?

I use version 6

I suggest you use ASTPP billing just for billing, and use a PBX for doing everything else.

Ideally, this would be done in ASTPP; there are multiple inbound numbers for clients who do not have a PBX.

Community version is a bit limited. You can edit the XML files or put them on a PBX