I have a zap trunk that I want to use for outbound calls only. For incoming calls I have a fax machine to take the call. The Fax machine is connected in parallel to the Elastix box directly to the POTS line. However for an incoming call on the POTS line the Elastix box tries to route the call using one of the inbound routes. I have a IPKall inbound route for Any DID/Any CID which, I believe, tries to handle the call and rings a group of extensions. How do I stop Elastix from handling any incoming calls on the Zap trunk? Thank you.