M4 How to block calls

Block calls with specific CallerIDs coming from particular Originator

Within Originator Device settings, "Origination Point" section, "Source (CallerID) Deny" field, put regexp to match CallerIDs you want to block.

Block calls with specific CallerIDs going to particular Terminator

Within Terminator Device settins, "Termination Point" section, "Source (CallerID) Deny" field, put regexp to match CallerIDs you want to block.

Block calls with specific CallerIDs going to particular Dial Peer

Within Dial Peer Settings, "Source" section, "Source deny regexp" field, put regexp to match CallerIDs you want to block.