I hope someone can assist me. I am the Administrator of a Norstar Meridian telephone system Compact ICS 4.0. I need a step by step instruction on a restriction filter that will not allow outgoing calls to specific N. American area codes that are not included in the International call block provided by our long distance carrier. We are being hacked by outside sources & I have every other security measure on our PBX.I need to restrict the entire phone system not just specific lines. I would appreciate any help. I am ok programming the simpler features on the phone system. But going that deep into the Admin give me pause. Thank you for any help.