Um.. No info, examples, or documentation on *67?

Yeah… Sounds pretty insane, but after 1-hour of searching the search engine (with many of the links dead and gone), there’s absolutely no information on Calling Number Delivery Blocking. No information on how it works, why it’s disabled, how to enable, or where to find it. There’s nothing in extensions.conf, no example config, nothing…

All other * services/ extensions work for me, but *67 does not exist on this 1.5 install with AMP. Ok… So I give up. Where is the ‘Calling Number Delivery Blocking’ snippet, and or how do I enable it?

Many thanks,