Hi there!
We’re using FreePBX Distro (5.211.65-6), and we’re very happy with it.
But we have never been able to get this thing working: When we use the Feature Code *8 Asterisk General Call Pickup, when don’t want it to pickup internal calls (From one extension to another).
Suggest you read documentation on call Pickup, Pickup groups and directed call pickup.
Also we have a post “read this before posting”, since you failed to follow the directions and give us information on your system we can only assume you are not vested in a solution.